The development of efficient non‐noble‐metal hydrogen evolution electrocatalysts in alkaline media is crucial for sustainable, ecofriendly production of H₂ through water electrolysis. An alkaline hydrogen evolution reaction (HER) catalyst composed of Ni(OH)₂‐decorated thungsten phosphide (WP) nanorod arrays on carbon paper was synthesized by thermal evaporation and electrodeposition. This hybrid catalyst displayed outstanding HER activity and required a low overpotential of only 77 mV to obtain a current density of 10 mA cm⁻² and a Tafel slope of 71 mV dec⁻¹. The hybrid catalyst also showed long‐term electrochemical stability, maintaining its activity for 18 h. This improved HER efficiency was attributed to the synergetic effect of WP and Ni(OH)₂: Ni(OH)₂ effectively lowers the energy barrier during water dissociation and also provides active sites for hydroxyl adsorption, whereas WP adsorbs hydrogen intermediates and efficiently produces H₂ gas. This interfacial cooperation offers not only excellent HER catalytic activity but also new strategies for the fabrication of effective non‐noble‐metal‐based electrocatalysts in alkaline media.

中文翻译：

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Ni（OH）2-WP混合纳米棒阵列，用于碱性介质中的高效持久氢分解反应

在碱性介质中开发有效的非贵金属氢析出电催化剂对于通过水电解可持续，环保地生产H ₂至关重要。通过热蒸发和电沉积合成了由Ni（OH）₂装饰的磷化钨（WP）纳米棒阵列组成的碱性氢释放反应（HER）催化剂。该杂化催化剂显示出出色的HER活性，仅需77 mV的低超电势即可获得10 mA cm ^-2的电流密度和71 mV dec ^-1的Tafel斜率。杂化催化剂还显示出长期的电化学稳定性，可保持其活性18小时。HER效率的提高归因于WP和Ni（OH）₂的协同作用：Ni（OH）₂有效地降低了水离解过程中的能垒，还提供了羟基吸附的活性位，而WP则吸附了氢中间体并有效地产生了H ₂气。这种界面合作不仅提供了出色的HER催化活性，而且提供了在碱性介质中制备有效的非贵金属基电催化剂的新策略。