A new method to improve surface morphology of Ni-Fe-Mo-Co alloy electrode and its catalytic activity for HER
来源期刊：Rare Metals2007年第3期
论文作者：LUO Beiping,), REN Buye), XU You), and ZHENG Yajie) ) Department of Chemistry and Chemical Engineering, Hunan Institute of Science and Technology, Yueyang , China ) College of Metallurgical Science and Engineering, Central South University, Changsha , China ) Research Institute of Materials Science, South China University of Technology, Guangzhou , China
文章页码：205 - 212
摘 要：A new pretreatment method has been developed to improve the catalytic activity of the Ni-Fe-Mo-Co alloy elec- trode for hydrogen evolution reaction （HER）. The procedure involves pre-electrolyzing the Ni-Fe-Mo-Co alloy electrode in 30% KOH solution containing 10% potassium sodium tartrate at 70°C for 2 h, until some of the Mo and Fe elements are leached out. The surface morphology of the Ni-Fe-Mo-Co alloy demonstrates a unique hive-like structure after the pre- treatment, which has the pore size in a nanometer range （about 50 nm）, a very large real surface area, and good stability. The results of the electrochemical studies show that compared to other similar electrode materials and the treated Ni-Fe-Mo-Co electrode by leaching method, the pre-treated Ni-Fe-Mo-Co electrode has a much lower overpotential and much higher exchange current density for HER. In addition, a long-term continuous electrolysis test with a current interrup- tion shows that the Ni-Fe-Mo-Co alloy has excellent catalytic stability.
LUO Beiping1,2), REN Buye3), XU You1), and ZHENG Yajie2) 1) Department of Chemistry and Chemical Engineering, Hunan Institute of Science and Technology, Yueyang 414000, China 2) College of Metallurgical Science and Engineering, Central South University, Changsha 410083, China 3) Research Institute of Materials Science, South China University of Technology, Guangzhou 510640, China
摘 要：A new pretreatment method has been developed to improve the catalytic activity of the Ni-Fe-Mo-Co alloy elec- trode for hydrogen evolution reaction （HER）. The procedure involves pre-electrolyzing the Ni-Fe-Mo-Co alloy electrode in 30% KOH solution containing 10% potassium sodium tartrate at 70°C for 2 h, until some of the Mo and Fe elements are leached out. The surface morphology of the Ni-Fe-Mo-Co alloy demonstrates a unique hive-like structure after the pre- treatment, which has the pore size in a nanometer range （about 50 nm）, a very large real surface area, and good stability. The results of the electrochemical studies show that compared to other similar electrode materials and the treated Ni-Fe-Mo-Co electrode by leaching method, the pre-treated Ni-Fe-Mo-Co electrode has a much lower overpotential and much higher exchange current density for HER. In addition, a long-term continuous electrolysis test with a current interrup- tion shows that the Ni-Fe-Mo-Co alloy has excellent catalytic stability.
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