Co/La-Ga-O复合氧化物用于催化二氧化碳加氢制乙醇
|
摘要
以LaCo_(1-x)Ga_xO_3为前驱体,还原后得到的Co/La_2O_3-La_4Ga_2O_9复合氧化物催化剂,用于CO_2加氢直接制乙醇。通过XRD、XPS、TPD和TEM等技术对催化剂结构进行了表征,采用微型固定床反应器在230-290℃、3 MPa、空速(GHSV)为3000 mL/(g_(cat)·h)和H_2/CO_2进料物质的量比为3.0的条件下,考察了该Co/La-Ga-O复合氧化物用于CO_2加氢制乙醇的催化性能。结果显示,该Co/La-Ga-O复合氧化物催化剂对生成乙醇具有很高的选择性。与LaCoO_3相比,Ga的掺杂可抑制甲烷的形成,促进醇类(特别是乙醇)的生成。当Co/Ga比为7∶3时,还原后的LaCo_(1-x)Ga_xO_3催化剂体现出最好的催化性能,CO_2转化率为9.8%,总醇选择性达到74.7%,其中,液相产物中的乙醇质量分数可达到88.1%。基于实验结果推测,该催化剂上Co~0和Co~(δ+)的协同作用促使CO_2选择性加氢生成乙醇。
A new Co/La_2 O_3-La_4 Ga_2 O_9 catalyst was prepared by reducing LaCo_(1-x)Ga_xO_3 perovskite and used in the direct synthesis of ethanol from CO_2 hydrogenation. The composite catalyst was characterized by XRD,XPS,TPD and TEM and its catalytic performance in CO_2 hydrogenation was investigated in a micro fixed-bed reactor operated at 230-290 ℃,3 MPa,gas hourly space velocity( GHSV) of 3000 mL/( gcat·h) and H_2/CO_2 molar ratio of 3.0. The results indicate that the Co/La-Ga-O composite oxide catalyst exhibits high selectivity to ethanol in CO_2 hydrogenation. In comparison with the LaCoO_3 catalyst,the incorporation of Ga dopant can inhibit the formation of CH4 and then promote the production of alcohols,especially ethanol. With a Co/Ga atomic ratio of7 ∶3,the Co/La-Ga-O composite oxide catalyst displays the best performance in CO_2 hydrogenation,with a CO_2 conversion of 9.8%,a selectivity of 74.7% to total alcohols and ethanol content of 88.1%( mass ratio) in the alcohols mixture. On the basis of the experimental results,it is speculated that the synergistic effect of surface Co~0 and Co~(δ+) may contribute to the excellent performance of the Co/La_2 O_3-La_4 Ga_2 O_9 catalyst in CO_2 hydrogenation to ethanol.
A new Co/La_2 O_3-La_4 Ga_2 O_9 catalyst was prepared by reducing LaCo_(1-x)Ga_xO_3 perovskite and used in the direct synthesis of ethanol from CO_2 hydrogenation. The composite catalyst was characterized by XRD,XPS,TPD and TEM and its catalytic performance in CO_2 hydrogenation was investigated in a micro fixed-bed reactor operated at 230-290 ℃,3 MPa,gas hourly space velocity( GHSV) of 3000 mL/( gcat·h) and H_2/CO_2 molar ratio of 3.0. The results indicate that the Co/La-Ga-O composite oxide catalyst exhibits high selectivity to ethanol in CO_2 hydrogenation. In comparison with the LaCoO_3 catalyst,the incorporation of Ga dopant can inhibit the formation of CH4 and then promote the production of alcohols,especially ethanol. With a Co/Ga atomic ratio of7 ∶3,the Co/La-Ga-O composite oxide catalyst displays the best performance in CO_2 hydrogenation,with a CO_2 conversion of 9.8%,a selectivity of 74.7% to total alcohols and ethanol content of 88.1%( mass ratio) in the alcohols mixture. On the basis of the experimental results,it is speculated that the synergistic effect of surface Co~0 and Co~(δ+) may contribute to the excellent performance of the Co/La_2 O_3-La_4 Ga_2 O_9 catalyst in CO_2 hydrogenation to ethanol.
引文
[1]WANG D,BI Q,YIN G,ZHAO W,HUANG F,XIE X,JIANG M.Direct synthesis of ethanol via CO2 hydrogenation using supported gold catalysts[J].Chem Commun(Camb),2016,52(99):14226-14229.
[2]WANG W,WANG S,MA X,GONG J.Recent advances in catalytic hydrogenation of carbon dioxide[J].Chem Soc Rev,2011,40(7):3703-3727.
[3]WEI W,JINLONG G.Methanation of carbon dioxide:An overview[J].Front Chem Sci Eng,2011,5(1):2-10.
[4]AZIZ M A A,JALIL A A,TRIWAHYONO S,AHMAD A.CO2 methanation over heterogeneous catalysts:Recent progress and future prospects[J].Green Chem,2015,17(5):2647-2663.
[5]POROSOFF M D,YAN B,CHEN J G.Catalytic reduction of CO2 by H2 for synthesis of CO,methanol and hydrocarbons:Challenges and opportunities[J].Energy Environ Sci,2016,9(1):62-73.
[6]SUN K,LU W,QIU F,LIU S,XU X.Direct synthesis of DME over bifunctional catalyst:Surface properties and catalytic performance[J].Appl Catal A:Gen,2003,252(2):243-249.
[7]WANG L,WANG L,ZHANG J,LIU X,WANG H,ZHANG W,YANG Q,MA J,DONG X,YOO S J,KIM J,MENG X,XIAO F.Selective hydrogenation of CO2 to ethanol over cobalt catalysts[J].Angew Chem Int Ed,2018,57(21):6104-6108.
[8]WANG D,BI Q,YIN G,ZHAO W,HUANG F,XIE X,JIANG M.Direct synthesis of ethanol via CO2 hydrogenation using supported gold catalysts[J].Chem Commun,2016,52(99):14226-14229.
[9]QIAN Q,CUI M,HE Z,WU C,ZHU Q,ZHANG Z,MA J,YANG G,ZHANG J,HAN B.Highly selective hydrogenation of CO2 into C2+alcohols by homogeneous catalysis[J].Chem Sci,2015,6(10):5685-5689.
[10]HE Z,QIAN Q,MA J,MENG Q,ZHOU H,SONG J,LIU Z,HAN B.Water-enhanced synthesis of higher alcohols from CO2Hydrogenation over a Pt/Co3O4 catalyst under milder conditions[J].Angew Chem Int Ed,2016,55(2):737-741.
[11]OUYANG B,XIONG S,ZHANG Y,LIU B,LI J.The study of morphology effect of Pt/Co3O4 catalysts for higher alcohol synthesis from CO2 hydrogenation[J].Appl Catal A:Gen,2017,543:189-195.
[12]PRIETO G.Carbon dioxide hydrogenation into higher hydrocarbons and oxygenates:Thermodynamic and kinetic bounds and progress with heterogeneousand homogeneous catalysis[J].ChemSusChem,2017,10(6):1056-1070.
[13]GNANAMANI M K,JACOBS G,KEOGH R A,SHAFER W D,SPARKS D E,HOPPS S D,THOMAS G A,DAVIS B H.FischerTropsch synthesis:Effect of pretreatment conditions of cobalt on activity and selectivity for hydrogenation of carbon dioxide[J].Appl Catal A:Gen,2015,499:39-46.
[14]GNANAMANI M K,HAMDEH H H,JACOBS G,SHAFER W D,HOPPS S D,THOMAS G A,DAVIS B H.Hydrogenation of carbon dioxide over K-promoted FeCo bimetallic catalysts prepared from mixed metal oxalates[J].ChemCatChem,2017,9(7):1303-1312.
[15]GUO H,LI S,PENG F,ZHANG H,XIONG L,HUANG C,WANG C,CHEN X.Roles investigation of promoters in K/Cu-Zn catalyst and higher alcohols synthesis from CO2 hydrogenation over a novel two-stage bed catalyst combination system[J].Catal Lett,2015,145(2):620-630.
[16]GNANAMANI M K,JACOBS G,HAMDEH H H,SHAFER W D,LIU F,HOPPS S D,THOMAS G A,DAVIS B H.Hydrogenation of carbon dioxide over Co-Fe bimetallic catalysts[J].ACS Catal,2016,6(2):913-927.
[17]POUR A N,HOSAINI E,IZADYAR M,HOUSAINDOKHT M R.Particle size effects in Fischer-Tropsch synthesis by Co catalyst supported on carbon nanotubes[J].Chin J Catal,2015,36(8):1372-1378.
[18]ZHOU G,LIU H,XING Y,XU S,XIE H,XIONG K.CO2 hydrogenation to methane over mesoporous Co/SiO2 catalysts:Effect of structure[J].J CO2 Util,2018,26:221-229.
[19]LIU H,XU S,ZHOU G,XIONG K,JIAO Z,WANG S.CO2 hydrogenation to methane over Co/KIT-6 catalysts:Effect of Co content[J].Fuel,2018,217:570-576.
[20]LI Z,SI M,XIN L,LIU R,LIU R,LJ.Cobalt catalysts for Fischer-Tropsch synthesis:The effect of support,precipitant and pH value[J].Chin J Chem Eng,2018,26(4):747-752.
[21]JOHNSON G R,BELL A T.Effects of Lewis acidity of metal oxide promoters on the activity and selectivity of Co-based Fischer-Tropsch synthesis catalysts[J].J Catal,2016,338:250-264.
[22]LEE M,JUNG W.Hydrothermal synthesis of LaCO3OH and Ln3+-doped LaCO3OH powders under ambient pressure and their transformation to La2O2CO3 and La2O3[J].Bull Korean Chem Soc,2013,34(12):3609-3614.
[23]CHAKRABARTI D,DE KLERK A,PRASAD V,GNANAMANI M K,SHAFER W D,JACOBS G,SPARKS D E,DAVIS B H.Conversion of CO2 over a Co-based Fischer-Tropsch catalyst[J].Ind Eng Chem Res,2015,54(4):1189-1196.
[24]GAO P,LI F,ZHAN H,ZHAO N,XIAO F,WEI W,ZHONG L,WANG H,SUN Y.Influence of Zr on the performance of Cu/Zn/Al/Zr catalysts via hydrotalcite-like precursors for CO2 hydrogenation to methanol[J].J Catal,2013,298:51-60.
[25]DU H,ZHU H,ZHAO Z,DONG W,LUO W,LU W,JIANG M,LIU T,DING Y.Effects of impregnation strategy on structure and performance of bimetallic CoFe/AC catalysts for higher alcohols synthesis from syngas[J].Appl Catal A:Gen,2016,523:263-271.
[26]BEDEL L,ROGER A C,ESTOURNES C,KIENNEMANN A.Co0 from partial reduction of La(Co,Fe)O3 perovskites for Fischer-Tropsch synthesis[J].Catal Today,2003,85(2/4):207-218.
[27]TONIOLO F S,MAGALHES R N S H,PEREZ C A C,SCHMAL M.Structural investigation of LaCoO3 and LaCoCuO3 perovskite-type oxides and the effect of Cu on coke deposition in the partial oxidation of methane[J].Appl Catal B:Environ,2012,117/118:156-166.
[28]ONRUBIA J A,PEREDA-AYO B,DE-LA-TORRE U,GONZLEZ-VELASCO J R.Key factors in Sr-doped LaBO3(B=Co or Mn)perovskites for NO oxidation in efficient diesel exhaust purification[J].Appl Catal B:Environ,2017,213:198-210.
[29]NIU T,LIU G L,CHEN Y,YANG J,WU J,CAO Y,LIU Y.Hydrothermal synthesis of graphene-LaFeO3 composite supported with CuCo nanocatalyst for higher alcohol synthesis from syngas[J].Appl Surf Sci,2016,364:388-399.
[30]GUO S,LI S,ZHONG H,GONG D,WANG J,KANG N,ZHANG L,LIU G,LIU Y.Mixed oxides confined and tailored cobalt nanocatalyst for direct ethanol synthesis from syngas:A catalyst designing by using Perovskite-Type oxide as the precursor[J].Ind Eng Chem Res,2018,57(6):2404-2415.
[31]PODILA S,DRISS H,ZAMAN S F,ALHAMED Y A,ALZAHRANI A A,DAOUS M A,PETROV L A.Hydrogen generation by ammonia decomposition using Co/MgO-La2O3 catalyst:Influence of support calcination atmosphere[J].J Mol Catal A:Chem,2016,414:130-139.
[32]DE LA PEA O SHEA V A,GONZLEZ S,ILLAS F,FIERRO J L G.Evidence for spontaneous CO2 activation on cobalt surfaces[J].Chem Phys Lett,2008,454(4/6):262-268.
[33]YAZDANI P,WANG B,GAO F,KAWI S,BORGNA A.Role of the strong lewis base sites on glucose hydrogenolysis[J].ChemCatChem,2018,10(17):3845-3853.
[34]PODILA S,DRISS H,ZAMAN S F,ALI A M,AL-ZAHRANI A A,DAOUS M A,PETROV L A.Effect of preparation methods on the catalyst performance of Co/Mg La mixed oxide catalyst for COx-free hydrogen production by ammonia decomposition[J].Int J Hydrogen Energy,2017,42(38):24213-24221.
[35]ZHANG Y,HAN K,CHENG T,FANG Z.Synthesis,characterization,and photoluminescence property of LaCO3OH microspheres[J].Inorg Chem,2007,46(11):4713-4717.
[36]JENA H,GOVINDAN KUTTY K V,KUTTY T R N.Novel wet chemical synthesis and ionic transport properties of LaGaO3 and selected doped compositions at elevated temperatures[J].Mater Sci Eng B,2004,113(1):30-41.
[37]JAIN R,GOPINATH C S.New strategy toward a dual functional nanocatalyst at ambient conditions:Influence of the Pd-Co interface in the catalytic activity of Pd@Co core-shell nanoparticles[J].ACS Appl Mater Interfaces,2018,10(48):41268-41278.
[38]BIESINGER M C,PAYNE B P,GROSVENOR A P,LAU L W M,GERSON A R,SMART R S C.Resolving surface chemical states in XPS analysis of first row transition metals,oxides and hydroxides:Cr,Mn,Fe,Co and Ni[J].Appl Surf Sci,2011,257(7):2717-2730.
[39]LIU L F,KANG J F,WANG Y,TANG H,KONG L G,SUN L,ZHANG X,HAN R Q.The influence of hydrogen annealing on magnetism of Co-doped TiO2 films prepared by sol-gel method[J].J Magn Magn Mater,2007,308(1):85-89.
[40]ZHAO L,HAN T,WANG H,ZHANG L,LIU Y.Ni-Co alloy catalyst from LaNi1-x Cox O3 perovskite supported on zirconia for steam reforming of ethanol[J].Appl Catal B:Environ,2016,187:19-29.
[41]SAN-JOS-ALONSO D,JUAN-JUAN J,ILLN-GMEZ M J,ROMN-MARTNEZ M C.Ni,Co and bimetallic Ni-Co catalysts for the dry reforming of methane[J].Appl Catal A:Gen,2009,371(1/2):54-59.
[42]LIU F,ZHAO L,WANG H,BAI X,LIU Y.Study on the preparation of Ni-La-Ce oxide catalyst for steam reforming of ethanol[J].Int JHydrogen Energy,2014,39(20):10454-10466.
[43]YANG Q,CAO A,KANG N,AN K,LIU Z,LIU Y.A new catalyst of Co/La2O3-doped La4Ga2O9 for direct ethanol synthesis from syngas[J].Fuel Process Technol,2018,179:42-52.
[44]PEI Y,LIU J,ZHAO Y,DING Y,LIU T,DONG W,ZHU H,SU H,YAN L,LI J,LI W.High alcohols synthesis via Fischer-Tropsch reaction at cobalt metal/carbide interface[J].ACS Catal,2015,5(6):3620-3624.
[45]R W DORNER D R H F,WILLAUER H D.Influence of gas feed composition and pressure on the catalytic conversion of CO2 to hydrocarbons using a traditional cobalt-based Fischer-Tropsch catalyst[J].Energy Fuels,2009,23:4190-4195.
[46]JIAO G,DING Y,ZHU H,LI X,LI J,LIN R,DONG W,GONG L,PEI Y,LU Y.Effect of La2O3 doping on syntheses of C1-C18 mixed linearα-alcohols from syngas over the Co/AC catalysts[J].Appl Catal A:Gen,2009,364(1/2):137-142.
[47]SMITH M L,KUMAR N,SPIVEY J J.CO adsorption behavior of Cu/SiO2,Co/SiO2,and CuCo/SiO2 catalysts studied by in situ DRIFTS[J].J Phys Chem C,2012,116(14):7931-7939.
[48]ZHANG Y,JACOBS G,SPARKS D E,DRY M E,DAVIS B H.CO and CO2 hydrogenation study on supported cobalt Fischer-Tropsch synthesis catalysts[J].Catal Today,2002,71(3/4):411-418.
[49]TAKANABE K,NAGAOKA K,NARIAI K,AIKA K.Titania-supported cobalt and nickel bimetallic catalysts for carbon dioxide reforming of methane[J].J Catal,2005,232(2):268-275.
[2]WANG W,WANG S,MA X,GONG J.Recent advances in catalytic hydrogenation of carbon dioxide[J].Chem Soc Rev,2011,40(7):3703-3727.
[3]WEI W,JINLONG G.Methanation of carbon dioxide:An overview[J].Front Chem Sci Eng,2011,5(1):2-10.
[4]AZIZ M A A,JALIL A A,TRIWAHYONO S,AHMAD A.CO2 methanation over heterogeneous catalysts:Recent progress and future prospects[J].Green Chem,2015,17(5):2647-2663.
[5]POROSOFF M D,YAN B,CHEN J G.Catalytic reduction of CO2 by H2 for synthesis of CO,methanol and hydrocarbons:Challenges and opportunities[J].Energy Environ Sci,2016,9(1):62-73.
[6]SUN K,LU W,QIU F,LIU S,XU X.Direct synthesis of DME over bifunctional catalyst:Surface properties and catalytic performance[J].Appl Catal A:Gen,2003,252(2):243-249.
[7]WANG L,WANG L,ZHANG J,LIU X,WANG H,ZHANG W,YANG Q,MA J,DONG X,YOO S J,KIM J,MENG X,XIAO F.Selective hydrogenation of CO2 to ethanol over cobalt catalysts[J].Angew Chem Int Ed,2018,57(21):6104-6108.
[8]WANG D,BI Q,YIN G,ZHAO W,HUANG F,XIE X,JIANG M.Direct synthesis of ethanol via CO2 hydrogenation using supported gold catalysts[J].Chem Commun,2016,52(99):14226-14229.
[9]QIAN Q,CUI M,HE Z,WU C,ZHU Q,ZHANG Z,MA J,YANG G,ZHANG J,HAN B.Highly selective hydrogenation of CO2 into C2+alcohols by homogeneous catalysis[J].Chem Sci,2015,6(10):5685-5689.
[10]HE Z,QIAN Q,MA J,MENG Q,ZHOU H,SONG J,LIU Z,HAN B.Water-enhanced synthesis of higher alcohols from CO2Hydrogenation over a Pt/Co3O4 catalyst under milder conditions[J].Angew Chem Int Ed,2016,55(2):737-741.
[11]OUYANG B,XIONG S,ZHANG Y,LIU B,LI J.The study of morphology effect of Pt/Co3O4 catalysts for higher alcohol synthesis from CO2 hydrogenation[J].Appl Catal A:Gen,2017,543:189-195.
[12]PRIETO G.Carbon dioxide hydrogenation into higher hydrocarbons and oxygenates:Thermodynamic and kinetic bounds and progress with heterogeneousand homogeneous catalysis[J].ChemSusChem,2017,10(6):1056-1070.
[13]GNANAMANI M K,JACOBS G,KEOGH R A,SHAFER W D,SPARKS D E,HOPPS S D,THOMAS G A,DAVIS B H.FischerTropsch synthesis:Effect of pretreatment conditions of cobalt on activity and selectivity for hydrogenation of carbon dioxide[J].Appl Catal A:Gen,2015,499:39-46.
[14]GNANAMANI M K,HAMDEH H H,JACOBS G,SHAFER W D,HOPPS S D,THOMAS G A,DAVIS B H.Hydrogenation of carbon dioxide over K-promoted FeCo bimetallic catalysts prepared from mixed metal oxalates[J].ChemCatChem,2017,9(7):1303-1312.
[15]GUO H,LI S,PENG F,ZHANG H,XIONG L,HUANG C,WANG C,CHEN X.Roles investigation of promoters in K/Cu-Zn catalyst and higher alcohols synthesis from CO2 hydrogenation over a novel two-stage bed catalyst combination system[J].Catal Lett,2015,145(2):620-630.
[16]GNANAMANI M K,JACOBS G,HAMDEH H H,SHAFER W D,LIU F,HOPPS S D,THOMAS G A,DAVIS B H.Hydrogenation of carbon dioxide over Co-Fe bimetallic catalysts[J].ACS Catal,2016,6(2):913-927.
[17]POUR A N,HOSAINI E,IZADYAR M,HOUSAINDOKHT M R.Particle size effects in Fischer-Tropsch synthesis by Co catalyst supported on carbon nanotubes[J].Chin J Catal,2015,36(8):1372-1378.
[18]ZHOU G,LIU H,XING Y,XU S,XIE H,XIONG K.CO2 hydrogenation to methane over mesoporous Co/SiO2 catalysts:Effect of structure[J].J CO2 Util,2018,26:221-229.
[19]LIU H,XU S,ZHOU G,XIONG K,JIAO Z,WANG S.CO2 hydrogenation to methane over Co/KIT-6 catalysts:Effect of Co content[J].Fuel,2018,217:570-576.
[20]LI Z,SI M,XIN L,LIU R,LIU R,LJ.Cobalt catalysts for Fischer-Tropsch synthesis:The effect of support,precipitant and pH value[J].Chin J Chem Eng,2018,26(4):747-752.
[21]JOHNSON G R,BELL A T.Effects of Lewis acidity of metal oxide promoters on the activity and selectivity of Co-based Fischer-Tropsch synthesis catalysts[J].J Catal,2016,338:250-264.
[22]LEE M,JUNG W.Hydrothermal synthesis of LaCO3OH and Ln3+-doped LaCO3OH powders under ambient pressure and their transformation to La2O2CO3 and La2O3[J].Bull Korean Chem Soc,2013,34(12):3609-3614.
[23]CHAKRABARTI D,DE KLERK A,PRASAD V,GNANAMANI M K,SHAFER W D,JACOBS G,SPARKS D E,DAVIS B H.Conversion of CO2 over a Co-based Fischer-Tropsch catalyst[J].Ind Eng Chem Res,2015,54(4):1189-1196.
[24]GAO P,LI F,ZHAN H,ZHAO N,XIAO F,WEI W,ZHONG L,WANG H,SUN Y.Influence of Zr on the performance of Cu/Zn/Al/Zr catalysts via hydrotalcite-like precursors for CO2 hydrogenation to methanol[J].J Catal,2013,298:51-60.
[25]DU H,ZHU H,ZHAO Z,DONG W,LUO W,LU W,JIANG M,LIU T,DING Y.Effects of impregnation strategy on structure and performance of bimetallic CoFe/AC catalysts for higher alcohols synthesis from syngas[J].Appl Catal A:Gen,2016,523:263-271.
[26]BEDEL L,ROGER A C,ESTOURNES C,KIENNEMANN A.Co0 from partial reduction of La(Co,Fe)O3 perovskites for Fischer-Tropsch synthesis[J].Catal Today,2003,85(2/4):207-218.
[27]TONIOLO F S,MAGALHES R N S H,PEREZ C A C,SCHMAL M.Structural investigation of LaCoO3 and LaCoCuO3 perovskite-type oxides and the effect of Cu on coke deposition in the partial oxidation of methane[J].Appl Catal B:Environ,2012,117/118:156-166.
[28]ONRUBIA J A,PEREDA-AYO B,DE-LA-TORRE U,GONZLEZ-VELASCO J R.Key factors in Sr-doped LaBO3(B=Co or Mn)perovskites for NO oxidation in efficient diesel exhaust purification[J].Appl Catal B:Environ,2017,213:198-210.
[29]NIU T,LIU G L,CHEN Y,YANG J,WU J,CAO Y,LIU Y.Hydrothermal synthesis of graphene-LaFeO3 composite supported with CuCo nanocatalyst for higher alcohol synthesis from syngas[J].Appl Surf Sci,2016,364:388-399.
[30]GUO S,LI S,ZHONG H,GONG D,WANG J,KANG N,ZHANG L,LIU G,LIU Y.Mixed oxides confined and tailored cobalt nanocatalyst for direct ethanol synthesis from syngas:A catalyst designing by using Perovskite-Type oxide as the precursor[J].Ind Eng Chem Res,2018,57(6):2404-2415.
[31]PODILA S,DRISS H,ZAMAN S F,ALHAMED Y A,ALZAHRANI A A,DAOUS M A,PETROV L A.Hydrogen generation by ammonia decomposition using Co/MgO-La2O3 catalyst:Influence of support calcination atmosphere[J].J Mol Catal A:Chem,2016,414:130-139.
[32]DE LA PEA O SHEA V A,GONZLEZ S,ILLAS F,FIERRO J L G.Evidence for spontaneous CO2 activation on cobalt surfaces[J].Chem Phys Lett,2008,454(4/6):262-268.
[33]YAZDANI P,WANG B,GAO F,KAWI S,BORGNA A.Role of the strong lewis base sites on glucose hydrogenolysis[J].ChemCatChem,2018,10(17):3845-3853.
[34]PODILA S,DRISS H,ZAMAN S F,ALI A M,AL-ZAHRANI A A,DAOUS M A,PETROV L A.Effect of preparation methods on the catalyst performance of Co/Mg La mixed oxide catalyst for COx-free hydrogen production by ammonia decomposition[J].Int J Hydrogen Energy,2017,42(38):24213-24221.
[35]ZHANG Y,HAN K,CHENG T,FANG Z.Synthesis,characterization,and photoluminescence property of LaCO3OH microspheres[J].Inorg Chem,2007,46(11):4713-4717.
[36]JENA H,GOVINDAN KUTTY K V,KUTTY T R N.Novel wet chemical synthesis and ionic transport properties of LaGaO3 and selected doped compositions at elevated temperatures[J].Mater Sci Eng B,2004,113(1):30-41.
[37]JAIN R,GOPINATH C S.New strategy toward a dual functional nanocatalyst at ambient conditions:Influence of the Pd-Co interface in the catalytic activity of Pd@Co core-shell nanoparticles[J].ACS Appl Mater Interfaces,2018,10(48):41268-41278.
[38]BIESINGER M C,PAYNE B P,GROSVENOR A P,LAU L W M,GERSON A R,SMART R S C.Resolving surface chemical states in XPS analysis of first row transition metals,oxides and hydroxides:Cr,Mn,Fe,Co and Ni[J].Appl Surf Sci,2011,257(7):2717-2730.
[39]LIU L F,KANG J F,WANG Y,TANG H,KONG L G,SUN L,ZHANG X,HAN R Q.The influence of hydrogen annealing on magnetism of Co-doped TiO2 films prepared by sol-gel method[J].J Magn Magn Mater,2007,308(1):85-89.
[40]ZHAO L,HAN T,WANG H,ZHANG L,LIU Y.Ni-Co alloy catalyst from LaNi1-x Cox O3 perovskite supported on zirconia for steam reforming of ethanol[J].Appl Catal B:Environ,2016,187:19-29.
[41]SAN-JOS-ALONSO D,JUAN-JUAN J,ILLN-GMEZ M J,ROMN-MARTNEZ M C.Ni,Co and bimetallic Ni-Co catalysts for the dry reforming of methane[J].Appl Catal A:Gen,2009,371(1/2):54-59.
[42]LIU F,ZHAO L,WANG H,BAI X,LIU Y.Study on the preparation of Ni-La-Ce oxide catalyst for steam reforming of ethanol[J].Int JHydrogen Energy,2014,39(20):10454-10466.
[43]YANG Q,CAO A,KANG N,AN K,LIU Z,LIU Y.A new catalyst of Co/La2O3-doped La4Ga2O9 for direct ethanol synthesis from syngas[J].Fuel Process Technol,2018,179:42-52.
[44]PEI Y,LIU J,ZHAO Y,DING Y,LIU T,DONG W,ZHU H,SU H,YAN L,LI J,LI W.High alcohols synthesis via Fischer-Tropsch reaction at cobalt metal/carbide interface[J].ACS Catal,2015,5(6):3620-3624.
[45]R W DORNER D R H F,WILLAUER H D.Influence of gas feed composition and pressure on the catalytic conversion of CO2 to hydrocarbons using a traditional cobalt-based Fischer-Tropsch catalyst[J].Energy Fuels,2009,23:4190-4195.
[46]JIAO G,DING Y,ZHU H,LI X,LI J,LIN R,DONG W,GONG L,PEI Y,LU Y.Effect of La2O3 doping on syntheses of C1-C18 mixed linearα-alcohols from syngas over the Co/AC catalysts[J].Appl Catal A:Gen,2009,364(1/2):137-142.
[47]SMITH M L,KUMAR N,SPIVEY J J.CO adsorption behavior of Cu/SiO2,Co/SiO2,and CuCo/SiO2 catalysts studied by in situ DRIFTS[J].J Phys Chem C,2012,116(14):7931-7939.
[48]ZHANG Y,JACOBS G,SPARKS D E,DRY M E,DAVIS B H.CO and CO2 hydrogenation study on supported cobalt Fischer-Tropsch synthesis catalysts[J].Catal Today,2002,71(3/4):411-418.
[49]TAKANABE K,NAGAOKA K,NARIAI K,AIKA K.Titania-supported cobalt and nickel bimetallic catalysts for carbon dioxide reforming of methane[J].J Catal,2005,232(2):268-275.