High-efficiency low-cost and long-term stable hydrogen evolution catalysts play a decisive role in the production of hydrogen energy. Different from many previous studies that use binder to adhere nanoparticles to electrode substates CeO₂ nanoparticles are successfully introduced to a porous Ni-Cu substrate without binders in this work. The CeO₂-modified Ni-Cu catalyst has abundant active sites which can promote the mass transfer and facilitate the H_atom adsorption of hydrogen evolution reaction. In addition the oxygen vacancies of CeO₂ and the synergistic effect between Ce³⁺ and Ce⁴⁺ are manifested during the hydrogen evolution reaction. For producing hydrogen through water electrolysis results show that the obtained porous CeO₂/Ni-Cu catalyst presents an overpotential of 72 mV at a current density of 10 mA·cm⁻² as well as a long-term stability of more than 24 h. This work provides new idea for the development of the composite catalyst derived from non-precious metals with the stable structure for hydrogen evolution reaction in alkaline condition.

高效低成本、长期稳定的析氢催化剂在氢能生产中起着举足轻重的作用。与之前许多使用粘合剂将纳米颗粒粘附到电极基板上的研究不同，在这项工作中，CeO ₂纳米颗粒成功地引入到多孔 Ni-Cu 基板中，而无需使用粘合剂。CeO ₂修饰的Ni-Cu催化剂具有丰富的活性位点，可以促进传质和析氢反应的H_原子吸附。另外CeO ₂的氧空位和Ce ³⁺和Ce ⁴⁺之间的协同作用在析氢反应中表现出来。水电解制氢结果表明，所得多孔CeO ₂ /Ni-Cu催化剂在10 mA·cm ^-2的电流密度下表现出72 mV的过电位以及超过24 h的长期稳定性。该工作为开发具有稳定结构的非贵金属衍生的复合催化剂在碱性条件下析氢反应提供了新思路。