Hou Zhengfang, Fan Fangyuan, Wang Zhe, Du Yeshuang
Hubei Key Laboratory of Pollutant Analysis & Reuse Technology, College of Chemistry and Chemical Engineering, Hubei Normal University, Huangshi 435002, China.
Dalton Trans. 2024 Apr 30;53(17):7430-7435. doi: 10.1039/d3dt04034h.
Recently, there has been a significant interest in the study of highly active and stable transition metal-based electrocatalysts for the oxygen evolution reaction (OER). Non-noble metal nanocatalysts with excellent inherent activity, many exposed active centers, rapid electron transfer, and excellent structural stability are especially promising for the displacement of precious-metal catalysts for the production of sustainable and "clean" hydrogen gas through water-splitting. Herein, efficient electrocatalyst N-doped nickel molybdate nanorods were synthesized on Ni foam by a hydrothermal process and effortless chemical vapor deposition. The heterostructure interface of N-NiMoO/NiO led to strong electronic interactions, which were beneficial for enhancing the OER activity of the catalyst. Excellent OER catalytic activity in 1.0 M KOH was shown, which offered a small overpotential of 185.6 mV to acquire a current density of 10 mA cm (superior to the commercial benchmark material RuO under the same condition). This excellent electrocatalyst was stable for 90 h at a constant current density of 10 mA cm. We created an extremely reliable and effective OER electrocatalyst without the use of noble metals by doping a nonmetal element with nanostructured heterojunctions of various active components.
最近，对于用于析氧反应（OER）的高活性和稳定的过渡金属基电催化剂的研究引起了极大的关注。具有优异固有活性、众多暴露活性中心、快速电子转移和出色结构稳定性的非贵金属纳米催化剂，对于通过水分解生产可持续且“清洁”氢气的过程中替代贵金属催化剂而言，尤其具有前景。在此，通过水热法和简便的化学气相沉积法在泡沫镍上合成了高效的电催化剂N掺杂钼酸镍纳米棒。N-NiMoO/NiO的异质结构界面导致了强烈的电子相互作用，这有利于提高催化剂的OER活性。在1.0 M KOH中表现出优异的OER催化活性，在获得10 mA cm的电流密度时提供了185.6 mV的小过电位（在相同条件下优于商业基准材料RuO）。这种优异的电催化剂在10 mA cm的恒定电流密度下稳定90小时。通过用各种活性组分的纳米结构异质结掺杂非金属元素，我们制备了一种无需使用贵金属的极其可靠且有效的OER电催化剂。
