A chemically etched CuCo-oxide (CE-CCO) electrode prepared by electrodeposition was used for oxygen evolution reaction electrocatalyst. Surface chemical etching of CuCo-oxide (CCO) introduced oxygen vacancies and thus increased electrical conductivity to promote oxygen generation. During practical applicability testing, when CE-CCO was used as the anode of an anion-exchange membrane water electrolyzer, enhanced oxygen evolution performance was observed (current density = 1390 mA/cm² at 1.8 V_cell), which, among other reactions, was ascribed to the easy removal of O₂ from the aerophobic electrode surface. In addition to featuring low mass transfer resistance even at high current density with substantial gas generation, the CE-CCO electrode featured remarkable durability, exhibiting stable performance over 3600 h under the conditions of continuous O₂ evolution. Thus, this work shows that the performance of electrodeposited oxide catalysts can be enhanced by introducing oxygen vacancies, while the energy conversion efficiency of the corresponding water electrolysis systems can be increased by lowering mass transfer resistance via efficient gas removal and reactant supply.

通过电沉积制备的化学蚀刻的CuCo-氧化物（CE-CCO）电极被用于析氧反应电催化剂。CuCo-氧化物（CCO）的表面化学蚀刻引入了氧空位，因此增加了电导率以促进氧的产生。在实际适用性测试中，当将CE-CCO用作阴离子交换膜水电解槽的阳极时，观察到增强的析氧性能（1.8 V_电池下的电流密度= 1390 mA / cm ²），除其他反应外，归因于容易除去O ₂从好氧电极表面。CE-CCO电极不仅具有即使在高电流密度下仍能产生大量气体的低传质阻力，又具有出色的耐用性，在连续释放O ₂的条件下，在3600小时内表现出稳定的性能。因此，这项工作表明，通过引入氧空位可以提高电沉积氧化物催化剂的性能，同时可以通过有效的气体去除和反应物供应来降低传质阻力，从而提高相应水电解系统的能量转化效率。