2results about How to "Improve hydrogen evolution catalytic activity" patented technology

The invention relates to a method for improving the stability of a transition metal phosphide hydrogen evolution catalyst, which comprises the following steps: loading Ce and a metal-glucose precursor on foamed nickel by adopting a one-pot method, phosphorizing to obtain a Ce-doped carbon-coated phosphide catalyst, and protecting the phosphide active phase and improving the hydrogen evolution activity of the catalyst through the synergistic effect of Ce doping and a carbon layer. According to the transition metal phosphide hydrogen evolution catalyst, the Ce element is introduced into the transition metal phosphide hydrogen evolution catalyst, through the synergistic effect between carbon layers formed on the surface of the catalyst, the activity and the stability are improved, the preparation process is simple, the cost is low, the stability and the catalytic activity of the catalyst can be greatly improved through Ce doping, and the application prospect is wide. The method can be widely applied to various important electrochemical reactions such as water / seawater decomposition, carbon dioxide reduction, microbial fuel cells and the like, and has important industrial application value.

The application relates to the field of electrocatalysis, and particularly relates to a high-catalytic-activity Ni-Se-HREE hydrogen evolution electrode and a preparation method thereof.The atomic content percentage of the surface of the nickel-based hydrogen evolution electrode coating layer is as follows: Se: 6-10%; Gd: 0.1-1.0%, and the rest is Ni; or the atomic content percentage of the surface of the nickel-based hydrogen evolution electrode coating layer is as follows: Se: 5-20%; Lu: 1-5%, and the rest is Ni.After optimization, the hydrogen evolution overpotential of the prepared Ni-Se-HREE hydrogen evolution electrode material is less than or equal to 43 mV; after long-time electrolysis of the electrode for 1200 h, the stability is good, the requirements of low hydrogen evolution overpotential, high catalytic activity and high stability are met, and the electrode can be widely applied to the water electrolysis hydrogen production industry.