Wang Xin, Liu Tianpeng, Li Jie, Yu Shudi, Xu Yuhua, Wu Zhengying, Du Yukou
College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China.
College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China; The School of Science, Xi'an Jiaotong-Liverpool University, Suzhou 215028, China.
J Colloid Interface Sci. 2025 Dec 15;700(Pt 3):138611. doi: 10.1016/j.jcis.2025.138611. Epub 2025 Aug 5.
The design and fabrication of non-noble metal-based electrocatalysts represent the significant research focus because of abundant reserves, low cost and superior performance in hydrogen energy generation. Consequently, the vulcanized Mn-Fe-Ni trimetallic catalyst on nickel foam (NF), recorded as MnFeNiS-2h/NF and characterized by a rough nanostructure and great conductivity, is particularly beneficial to oxygen evolution reaction (OER) when synthesized via the hydrothermal method. It has been demonstrated that the development of derivatives and the integration with conductive substrates can promote the structural optimization and enhance OER performance of layered double hydroxides (LDHs). In the alkaline solution, the electrocatalyst, MnFeNiS-2h/NF, exhibits the excellent performance, achieving low overpotentials of 140 mV to drive 10 mA cm and 234 mV for 100 mA cm, along with a favorable Tafel slope of 25.27 mV dec for the OER. In the context of overall water splitting (OWS), cell voltages of 1.48 V and 1.69 V were achieved with the catalyst to reach current densities of 10 and 100 mA cm in 1 M KOH solution, thus outperforming commercial catalysts. Notably, MnFeNiS-2h/NF demonstrates the considerably long-term durability, highlighting its practical applicability. This work explores OER driving mechanism slightly and provides an effective and promising strategy for synthesizing remarkable catalysts with superior activity and robust stability, utilizing easily available raw materials.
由于储量丰富、成本低廉且在氢能生成方面具有卓越性能，非贵金属基电催化剂的设计与制备成为重要的研究焦点。因此，泡沫镍（NF）上的硫化锰铁镍三金属催化剂，记为MnFeNiS-2h/NF，具有粗糙的纳米结构和良好的导电性，通过水热法合成时对析氧反应（OER）特别有利。已证明衍生物的开发以及与导电基底的整合可促进层状双氢氧化物（LDHs）的结构优化并提高其OER性能。在碱性溶液中，电催化剂MnFeNiS-2h/NF表现出优异的性能，驱动10 mA cm时的过电位低至140 mV，驱动100 mA cm时为234 mV，同时OER的塔菲尔斜率为25.27 mV dec。在全水解（OWS）的情况下，该催化剂在1 M KOH溶液中达到10和100 mA cm的电流密度时，电池电压分别为1.48 V和1.69 V，因此优于商业催化剂。值得注意的是，MnFeNiS-2h/NF表现出相当长的长期耐久性，突出了其实际应用价值。这项工作对OER驱动机制进行了初步探索，并提供了一种有效且有前景的策略，即利用易得的原材料合成具有卓越活性和强大稳定性的出色催化剂。
