Jia Feihong, Zou Xiangyu, Wei Xueling, Bao Weiwei, Ai Taotao, Li Wenhu, Guo Yuchen
School of Materials Science and Engineering, Shaanxi University of Technology, Hanzhong 723000, China.
Materials (Basel). 2023 Apr 27;16(9):3411. doi: 10.3390/ma16093411.
Heterostructure construction and heteroatom doping are powerful strategies for enhancing the electrolytic efficiency of electrocatalysts for overall water splitting. Herein, we present a P-doped MoS/NiS electrocatalyst on nickel foam (NF) prepared using a one-step hydrothermal method. The optimized P-MoS/NiS@NF exhibits a cluster nanoflower-like morphology, which promotes the synergistic electrocatalytic effect of the heterostructures with abundant active centers, resulting in high catalytic activity for the hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) in alkaline electrolyte. The electrode exhibits low overpotentials and Tafel slopes for the HER and OER. In addition, the catalyst electrode used in a two-electrode system for overall water splitting requires an ultralow voltage of 1.42 V at 10 mA·cm and shows no obvious increase in current within 35 h, indicating excellent stability. Therefore, the combination of P doping and the heterostructure suggests a novel path to formulate high-performance electrocatalysts for overall water splitting.
异质结构构建和杂原子掺杂是提高用于全水解的电催化剂电解效率的有效策略。在此，我们展示了一种通过一步水热法制备的负载在泡沫镍（NF）上的P掺杂MoS/NiS电催化剂。优化后的P-MoS/NiS@NF呈现出簇状纳米花状形态，促进了具有丰富活性中心的异质结构的协同电催化作用，从而在碱性电解质中对析氢反应（HER）和析氧反应（OER）具有高催化活性。该电极对HER和OER表现出低过电位和塔菲尔斜率。此外，用于全水解的两电极系统中的催化剂电极在10 mA·cm时需要1.42 V的超低电压，并且在35 h内电流没有明显增加，表明具有优异的稳定性。因此，P掺杂与异质结构的结合为设计用于全水解的高性能电催化剂提供了一条新途径。
