|Cite this article as:|
|Lihua Liu, Ning Li, Jingrui Han, Kaili Yao, and Hongyan Liang, Multicomponent transition metal phosphide for oxygen evolution, Int. J. Miner. Metall. Mater.,(2021). https://doi.org/10.1007/s12613-021-2352-9|
Transition metal phosphides (TMPs) have exhibited decent performance for oxygen evolution reaction (OER), which is a kinetic bottleneck in many energy storages and conversion systems. However, most reported catalysts are composed of three or fewer metallic components, and the investigation of Multicomponent TMPs with more than four metallic components is hindered by their intrinsic complexity in rationally design the structure and fundamentally comprehension in the component-activity correlation. Here, we reported a facile strategy for combining TMPs with tunable elemental compositions (Ni, Fe, Mn, Co, Cu) on a two-dimensional titanium carbide (MXene) flake through a hydrothermal growth and subsequent phosphorization. The obtained TMPs/MXene hybrid nanostructures present homogeneously distributed elements, high electrical conductivity, and strong interfacial interaction, resulting in an accelerated reaction kinetics and long-term stability. OER performance of catalysts with different components was compared and the results show that NiFeMnCoP/MXene is the most active one with a low overpotential of 240 mV at 10 mA cm-2, a small Tafel slope of 41.43 mV dec-1, and a robust long-term electrochemical stability. The electrocatalytic mechanism investigation revealed that the enhanced OER performance of NiFeMnCoP/MXene results from a strong synergistic effect of the multi-elemental composition. Our work, therefore, provides a scalable synthesis route for multi-elemental TMPs and a valuable guideline for designing efficient MXene-supported catalysts.