零维Pd基直接乙醇燃料电池催化剂的性能
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摘要
以NaBH4为还原剂制备了Pd-Ru/C催化剂,研究不同Ru掺杂量对燃料电池阳极催化剂活性等的影响。利用XRD、EDS、TEM等技术表征催化剂的组成及微观结构;同时用BET等测试了催化剂的孔径和粒度分布。采用电化学工作站测试循环伏安特性来表征其电催化性能。测试结果表明,当Pd/Ru摩尔比为2∶1时,催化剂表现出最佳的抗中毒能力,电流稳定在50mA处,并且此时催化剂的电阻较小,具有较好的催化活性为207.40mA·cm-2。
NaBH4was used as reducing agent in the preparation of Pd-Ru/C as a catalyst.Effect of different Ru doping level on the catalyst activity were investigated.X-ray diffraction,transmission electronmicroscopy had been used to characterize microstructures and composition of the catalytic.Meanwhile,pore size and particle size distribution had also been tested.Cycle voltammetry was used to represent the electrochemical performance of all catalytics by using electrochemical workstation.It is found that when the molar ratio of Pd/Ru is 2∶1,the catalyst shows the best anti-poisoning ability and lower impendance.At the same time,the stable current is 50 mA and the catalytic activity is 207.40mA·cm-2.
NaBH4was used as reducing agent in the preparation of Pd-Ru/C as a catalyst.Effect of different Ru doping level on the catalyst activity were investigated.X-ray diffraction,transmission electronmicroscopy had been used to characterize microstructures and composition of the catalytic.Meanwhile,pore size and particle size distribution had also been tested.Cycle voltammetry was used to represent the electrochemical performance of all catalytics by using electrochemical workstation.It is found that when the molar ratio of Pd/Ru is 2∶1,the catalyst shows the best anti-poisoning ability and lower impendance.At the same time,the stable current is 50 mA and the catalytic activity is 207.40mA·cm-2.
引文
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[3]X.H.Wang,S.M.Yuan,Y.Zhu,H.J.Ni.Preparation and performance research of PtSn catalyst supported on carbon fiber for direct ethanol fuel cells[J].Journal of Fuel Chemistry and Technology,2012,40(12):1454~1458.
[4]X.G.Wang,W.M.Wang,Z.Qi,et al.Novel Raney-like nanoporous Pd catalyst with superior electrocatalytic activity towards ethanol electro-oxidation[J].International Journal of Hydrogen Energy,2012,37(3):2579~2587.
[5]杨京,楼白杨,熊京远,徐斌.Pt/Co改性石墨电极的制备及其电催化性能[J].材料科学与工程学报,2011,29(2):242~245.
[6]A.B.A.A.Nassr,A.Quetschke,E.Koslowski,M.Bron.Electrocatalytic oxidation of formic acid on Pd/MWCNTs nanocatalysts prepared by the polyol method[J].Electrochimica Acta,2013,102(15):202~211.
[7]S.Y.Shen,T.S.Zhao,J.B.Xu,Y.S.Li.Synthesis of PdNi catalysts for the oxidation of ethanol in alkaline direct ethanol fuel cells[J].Journal of Power Sources,2010,195(4):1001~1006.
[8]L.Ma,H.He,A.Hsu,R.R.Chen.PdRu/C catalysts for ethanol oxidation in anion-exchange membrane direct ethanol fuel cells[J].Journal of Power Sources,2013,241:696~702.
[9]吴嵩,刘宾虹,杨俊强,刘芙.Pd/MWCNT的合成及其对甲酸电化学氧化的催化性能[J].材料科学与工程学报,2010,28(2):189~192.
[10]C.Suryanarayana.Mechanical alloying and millin[J].Prog Mater Sci.,2001;46:1~184.
[11]陈滢.炭载Pd阳极催化剂制备及其对甲酸氧化的电催化性能的研究[D].陆天虹,南京:南京师范大学,2009.5.21.
[12]X.G.Wang,W.M.Wang,Z.Qi,et al.Novel Raney-like nanoporous Pd catalyst with superior electrocatalytic activity towards ethanol electro-oxidation[J].International Journal of Hydrogen Energy,2012,37:2579~2587.
[13]W.Pan,X.K.Zhang,H.Y.Ma,J.T.Zhang.Electrochemical synthesis,voltammetric behavior,and electrocatalytic activity of Pd nanoparticles[J].Phys Chem C,2008,112(3):2456~2461.
[14]X.Wang,Y.W.Tang,Y.Gao,T.H.Lu.Carbon-supported Pd-Ir catalyst as anodic catalyst in direct formic acid fuel cell[J].Power Sources,2008,175(2):784~8.
[15]Z.X.Liang,T.S.Zhao,J.B.Xu,L.D.Zhu.Mechanism study of the ethanol oxidation reaction on palladium in alkaline media[J].Electrochim Acta,2009,54(8):2203~8.
[16]Q.F.Yi,F.J.Niu,L.Z.Sun.Fabrication of novel porous Pd particles and their electroactivity towards ethanol oxidation in alkaline media[J].Fuel,2011,90(8):2617~23.
[17]Y.H.Qin,H.H.Yang,X.S.Zhang,et al.Electrophoretic deposition of network-like carbon nanofibers as a palladium catalyst support for ethanol oxidation in alkaline media[J].Carbon,2010,48(12):3323~9.
[18]沈娟章,杨改秀,唐亚文,陆天虹.直接甲酸燃料电池的研究进展[J].应用化学,2010,27(8):869~9.
[19]J.H.Chen,M.Y.Wang,B.Liu,et al.Platinum catalysts prepared with functional carbon nanotube defects and its improved catalytic performance for methanol oxidation[J].The Journal of Physical Chemistry B.,2006,110(24):11775~11779.