CoP_3和CoSP_3自支撑纳米线阵列的电催化析氢性能
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摘要
为开发廉价高效的电解水析氢催化材料,采用水热和气氛热处理法在碳纤维纸(carbon fiber paper,CFP)表面制备出了均匀生长的CoP_3和CoSP_3纳米线阵列(CoP_3NWs/CFP和CoSP_3NWs/CFP)。应用X射线衍射(X-ray diffraction,XRD)和扫描电子显微镜(scanning electron microscope,SEM)分析其物相和微观形貌,并测试其在酸性溶液中的析氢催化性能,从电化学阻抗谱(electrochemical impedance spectroscopy,EIS)和电化学活性面积(electrochemically active surface area,ECSA)两方面分析了CoSP_3NWs/CFP具有优异催化性能的原因。结果表明,CoSP_3具有比CoP_3更高的本征催化活性,CoSP_3NWs/CFP仅需要89mV和129mV的过电位即能驱动10mA/cm2和100mA/cm2的析氢电流密度,其Tafel斜率值为40.3mV/dec,并展现出良好的析氢稳定性。
The development of low-cost and efficient electrocatalysts for hydrogen evolution reaction is of great significance.In this paper,CoP_3 and CoSP_3 nanowire arrays were successfully grown on carbon fiber paper(CFP)via hydrothermal and atmospheric heat treatment method.X-ray diffraction(XRD)and scanning electron microscope(SEM)were used to analyze the phases and morphology of the as-obtained samples,respectively.The catalytic performance for hydrogen evolution reaction in acidic solution was tested.And the excellent performance of CoSP_3 NWs/CFP was supported by the electrochemical impedance spectroscopy(EIS)and electrochemically active surface area(ECSA)reults.It suggests that CoSP_3 has higher intrinsic catalytic activity than CoP_3.For CoSP_3 NWs/CFP,to drive current densities of 10 mA/cm2 and 100 mA/cm2,overpotential of 89 mV and129 mV will be only needed,respevtively,with a low Tafel slope of 40.3 mV/dec.Besides,CoSP_3 NWs/CFP also exhibited good stability at the same time.
The development of low-cost and efficient electrocatalysts for hydrogen evolution reaction is of great significance.In this paper,CoP_3 and CoSP_3 nanowire arrays were successfully grown on carbon fiber paper(CFP)via hydrothermal and atmospheric heat treatment method.X-ray diffraction(XRD)and scanning electron microscope(SEM)were used to analyze the phases and morphology of the as-obtained samples,respectively.The catalytic performance for hydrogen evolution reaction in acidic solution was tested.And the excellent performance of CoSP_3 NWs/CFP was supported by the electrochemical impedance spectroscopy(EIS)and electrochemically active surface area(ECSA)reults.It suggests that CoSP_3 has higher intrinsic catalytic activity than CoP_3.For CoSP_3 NWs/CFP,to drive current densities of 10 mA/cm2 and 100 mA/cm2,overpotential of 89 mV and129 mV will be only needed,respevtively,with a low Tafel slope of 40.3 mV/dec.Besides,CoSP_3 NWs/CFP also exhibited good stability at the same time.
引文
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[4]ZHANG Bao,LIU Jia,WANG Jinsong,et al.Interface engineering:the Ni(OH)2/MoS2 heterostructure for highly efficient alkaline hydrogen evolution[J].Nano Energy,2017,37:74-80.
[5]RAO Yuan,WANG Yang,NING Hui,et al.Hydrotalcite-like Ni(OH)2nanosheets in situ grown on nickel foam for overall water splitting[J].ACS Applied Materials&Interfaces,2016,8:33601-33607.
[6]JING Shengyu,ZHANG Lishang,LUO Lin,et al.N-doped porous molybdenum carbide nanobelts as efficient catalysts for hydrogen evolution reaction[J].Applied Catalysis B:Environmental,2018,224:533-540.
[7]ZHANG Jian,CUI Renjie,LI Xing’ao,et al.A nanohybrid consisting of NiPS3 nanoparticles coupled with defective graphene as a pH-universal electrocatalyst for efficient hydrogen evolution[J].Journal of Materials Chemistry A,2017,5(45):23536-23542.
[8]WU Tianli,PI Mingyu,ZHANG Dingke,et al.3Dstructured porous CoP3nanoneedle arrays as an efficient bifunctional electrocatalyst for the evolution reaction of hydrogen and oxygen[J].Journal of Materials Chemistry A,2016,4(38):14539-14544.
[9]CALLEJAS J F,READ C G,POPCZUN E J,et al.Nanostructured Co2P electrocatalyst for the hydrogen evolution reaction and direct comparison with morphologically equivalent CoP[J].Chemistry of Materials,2015,27(10):3769-3774.
[10]ZHANG Long,WANG Tao,SUN Lan,et al.Hydrothermal synthesis of 3Dhierarchical MoSe2/NiSe2composite nanowires on carbon fiber paper and their enhanced electrocatalytic activity for the hydrogen evolution reaction[J].Journal of Materials Chemistry A,2017,37(5):19752-19759.
[11]WANG Ke,XI Dan,ZHOU Congjian,et al.CoSe2necklace-like nanowires supported by carbon fiber paper:a 3Dintegrated electrode for the hydrogen evolution reaction[J].Journal of Materials Chemistry A,2015,3(18):9415-9420.
[12]WANG Ke,ZHOU Chongjian,XI Dan,et al.Component-controllable synthesis of Co(SxSe1-x)2nanowires supported by carbon fiber paper as high-performance electrode for hydrogen evolution reaction[J].Nano Energy,2015,18:1-11.
[13]LI Yanguang,WANG Hailiang,XIE Liming,et al.MoS2 nanoparticles grown on graphene:an advanced catalyst for the hydrogen evolution eeaction[J].Journal of the American Chemical Society,2011,133(19):7296-7299.
[14]AN Li,HUANG Liang,ZHOU Panpan,et al.A selfstanding high-performance hydrogen evolution electrode with nanostructured NiCo2O4/CuS heterostructures[J].Advanced Functional Materials,2015,43(25):6814-6822.
[15]KWAK I H,IM H S,JANG D M,et al.CoSe2and NiSe2nanocrystals as superior bifunctional catalysts for electrochemical and photoelectrochemical water splitting[J].ACS Applied Materials&Interfaces,2016,8(8):5327-5334.
[16]MA Lianbo,HU Yi,CHEN Renpeng,et al.Self-assembled ultrathin NiCo2S4nanoflakes grown on Ni foam as high-performance flexible electrodes for hydrogen evolution reaction in alkaline solution[J].Nano Energy,2016,24:139-147.
[17]YANG Yaqing,ZHANG Kai,LIN Huanlei,et al.MoS2-Ni3S2 heteronanorods as efficient and stable bifunctional electrocatalysts for overall water splitting[J].ACS Catalysis,2017,7(4):2357-2366.