Water electrolysis to produce high-purity hydrogen has been regarded as the most promising and attractive method for renewable energy production. The intrinsic high kinetic barrier of the involved electrode reactions, especially that of the anodic oxygen evolution reaction (OER), however severely hinders the application of the water electrolysis technology for large scale hydrogen production. In this paper, a nano-composite Fe- and Co-based material containing crystalline metal sulfide ((NiFeCo)S) and amorphous metal phosphide ((FeCo)P) was in-situ grown on the surface of foam nickel (NF). The (FC)P-(NFC)S/NF catalyst exhibits ultra-high activities for OER at high current densities in 1.0 M KOH, delivering 500 and 1000 mA cm^-2 at ultralow overpotentials of 274 and 280 mV, respectively with a small Tafel slope of 37.8 mV dec^-1. The excellent catalytic activities of (FC)P-(NFC)S/NF far exceed those of the reference single-component (FC)P/NF and (NFC)S/NF catalysts, and also exceed those of most non-noble metal catalysts reported in literature. Besides, the (FC)P-(NFC)S/NF catalyst exhibits high stability with almost no significant activity attenuation after the chronopotentiometric test at both 100 and 500 mA cm^-2 for 40 h. The synergistic effects between the metal sulfide and metal phosphide have positive impacts on the OER activity through increasing the surface area, enhancing the reactivity of each active site, improving the electrical conductivity as well as the interface between the crystalline and amorphous phases. The present work provides a new strategy to develop cost-effective and efficient electrocatalysts toward OER and water electrolysis.

电解水生产高纯度氢气被认为是最有前途和最具吸引力的可再生能源生产方法。然而，所涉及的电极反应，尤其是阳极析氧反应 (OER) 的内在高动力学势垒，严重阻碍了水电解技术在大规模制氢中的应用。在本文中，在泡沫镍 (NF) 表面原位生长了一种含有结晶金属硫化物 ((NiFeCo)S) 和非晶金属磷化物 ((FeCo)P) 的纳米复合铁钴基材料。 (FC)P-(NFC)S/NF 催化剂在 1.0 M KOH 的高电流密度下表现出超高的 OER 活性，在 274 和 280 的超低过电势下提供 500 和 1000  mA  cm ^-2  mV，分别具有 37.8 mV dec ^-1的小 Tafel 斜率。(FC)P-(NFC)S/NF优异的催化活性远超参考单组份(FC)P/NF和(NFC)S/NF催化剂，也超过大多数非贵金属文献中报道的催化剂。 此外，(FC)P-(NFC)S/NF 催化剂在 100 和 500 mA  cm ^-2下的计时电位测试40后表现出高稳定性，几乎没有明显的活性衰减 H。金属硫化物和金属磷化物之间的协同效应通过增加表面积、增强每个活性位点的反应性、改善电导率以及晶相和非晶相之间的界面，对 OER 活性产生积极影响。目前的工作为开发用于OER和水电解的具有成本效益和高效的电催化剂提供了一种新策略。