Gan Jia-Chun, Zhang Lu, Feng Jiu-Ju, Shi Ya-Cheng, Li Xin-Sheng, Wang Ai-Jun
Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, College of Chemistry and Materials Science, College of Geography and Environmental Sciences, Zhejiang Normal University, Jinhua 321004, PR China.
Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, College of Chemistry and Materials Science, College of Geography and Environmental Sciences, Zhejiang Normal University, Jinhua 321004, PR China.
J Colloid Interface Sci. 2025 Jun;687:24-35. doi: 10.1016/j.jcis.2025.02.048. Epub 2025 Feb 8.
The development of low-cost, efficient, and stable electrocatalysts is urgent in sustainable energy devices. Bifunctional catalysts are particularly crucial because they surmount the kinetics limitations stemming from the sluggish mechanism associated with hydrogen evolution reaction (HER)/oxygen evolution reaction (OER) in water electrolysis. Herein, self-supporting highly branched urchin-like NiCoP/NiFeP heterostructures were in situ grown on Ni foam (NF) through hydrothermal and phosphorization treatments, as examined by a set of characterizations. The role of the compositions played within the material was rigorously investigated to maximize the catalytic properties, coupled by elaborating the catalytic mechanism. The optimized NiCoP/NiFeP/NF exhibited superior performance with the boosted HER activity (overpotential of 43 mV @ 10 mA cm and 120 mV @ 100 mA cm) and high OER activity (overpotential of 261 mV @ 50 mA cm and 299 mV @ 100 mA cm). Notably, the two-electrode electrolyzer assembled with the NiCoP/NiFeP/NF achieved a cell voltage of 1.705 V at 100 mA cm, integrated by keeping stable operation over 100 h. In all, this research sheds some light on preparation of advanced catalysts in electrocatalysis and energy devices, potentially paving the way for efficient and sustainable energy technologies.
在可持续能源装置中，开发低成本、高效且稳定的电催化剂迫在眉睫。双功能催化剂尤为关键，因为它们克服了水电解中与析氢反应（HER）/析氧反应（OER）相关的缓慢机制所带来的动力学限制。在此，通过水热和磷化处理在泡沫镍（NF）上原位生长了自支撑的高度分支的海胆状NiCoP/NiFeP异质结构，并通过一系列表征进行了研究。通过阐述催化机制，严格研究了材料中各成分所起的作用，以最大限度地提高催化性能。优化后的NiCoP/NiFeP/NF表现出优异的性能，具有增强的HER活性（在10 mA cm时过电位为43 mV，在100 mA cm时为120 mV）和高OER活性（在50 mA cm时过电位为261 mV，在100 mA cm时为299 mV）。值得注意的是，用NiCoP/NiFeP/NF组装的两电极电解槽在100 mA cm时实现了1.705 V的电池电压，并在100 h内保持稳定运行。总之，这项研究为电催化和能源装置中先进催化剂的制备提供了一些启示，可能为高效和可持续能源技术铺平道路。
