Kong Qian, Yu Chengcheng, Lu Qing, Yang Xingyu, Xu Tongguang, Song Qi, Li Huatong, Yuan Zhaoshuo, Liu Hongyu, Qiao Qian, He Gang, Wang Yufan, Yao Linglong, Dai Xiaoping, Zhang Xin
State Key Laboratory of Heavy Oil Processing, College of Chemical Engineering and Environment, China University of Petroleum, Beijing, 102249, China.
Jihua Laboratory, Foshan, 528200, China.
Small. 2025 Sep;21(35):e2503398. doi: 10.1002/smll.202503398. Epub 2025 Jul 10.
The electrolysis of water for hydrogen production has gained increasing attention as a sustainable and efficient method to obtain high-purity green hydrogen. The development of efficient catalysts for hydrogen evolution is crucial in order to achieve this target under industrial conditions. The objective of this work is to synthesize a highly efficient F-CoFe(PO)/IF catalyst with ultra-low impedance for hydrogen evolution in electrolytic water by incorporating metal phosphatides into metal oxide nanoclusters through a controlled two-step process involving melting and electrodeposition. The nano-heterostructure of F-CoFe(PO)/IF exhibits a low overpotential of 276 mV at a current density of 1000 mA cm, while having an electrochemical impedance comparable to commercial Pt/C/CP (0.41 Ω), and long-term stability up to 200 h in 1 M KOH electrolyte. The synergistic effect of crystal/amorphous heterojunctions, F doping, and oxygen vacancies further enhances the kinetics of water cracking. Impressively, when combined with NiFeCo LDH/NiS/NF as membrane electrodes, F-CoFe(PO)/IF || NiFeCo LDH/NiS/NF achieves a water decomposition voltage of 2.03 V at a current density of 1000 mA cm and demonstrates stable operation for over 500 h, showing great potential for large-scale commercial production.
作为一种可持续且高效的获取高纯度绿色氢气的方法，水电解制氢已受到越来越多的关注。为了在工业条件下实现这一目标，开发高效的析氢催化剂至关重要。本工作的目的是通过一个涉及熔融和电沉积的可控两步法，将金属磷脂化物引入金属氧化物纳米团簇中，合成一种具有超低阻抗的高效F-CoFe(PO)/IF催化剂用于电解水析氢。F-CoFe(PO)/IF的纳米异质结构在电流密度为1000 mA cm时表现出276 mV的低过电位，同时具有与商业Pt/C/CP相当的电化学阻抗(0.41 Ω)，并且在1 M KOH电解液中具有长达200 h的长期稳定性。晶体/非晶异质结、F掺杂和氧空位的协同效应进一步增强了水裂解的动力学。令人印象深刻的是，当与NiFeCo LDH/NiS/NF作为膜电极结合时，F-CoFe(PO)/IF || NiFeCo LDH/NiS/NF在电流密度为1000 mA cm时实现了2.03 V的水分解电压，并展示了超过500 h的稳定运行，显示出大规模商业化生产的巨大潜力。
