Abstract Hydrogen evolution catalysts with excellent catalytic activity and low cost play an essential role in industrialization of water electrolysis. Ni-S electrocatalysts with carbon doping are promising hydrogen evolution reaction catalysts because of its high catalytic activity. Carbon has good electrical conductivity, and the synergistic effects of carbon and nickel-based catalysts can further improve the electrocatalytic activity. In order to dope carbon, nickel-thiourea complex was synthesized on the surface of electrocatalysts by a bubble template-directed method. The cauliflower-type Ni-S-C films are formed on the surface, which have much better electrocatalytic activity than porous Ni-S and Ni films in 1 M KOH solution. This work demonstrates that the presence of carbon in the surface layer benefits the charge transfer and improves the electrochemical activity.

中文翻译：

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用于析氢反应的碳掺杂自支撑多孔 Ni-S 电催化剂

摘要 具有优异催化活性和低成本的析氢催化剂在水电解工业化中发挥着重要作用。具有碳掺杂的 Ni-S 电催化剂由于其高催化活性而成为有前途的析氢反应催化剂。碳具有良好的导电性，碳和镍基催化剂的协同作用可以进一步提高电催化活性。为了掺杂碳，采用气泡模板导向法在电催化剂表面合成了镍硫脲配合物。表面形成菜花型Ni-SC膜，在1M KOH溶液中比多孔Ni-S和Ni膜具有更好的电催化活性。