Xu Lin, Zheng Lei, Xu Yixue, Hao Chenyang, Hu Xuemin, Wang Yuqiao
Research Center for Nano Photoelectrochemistry and Devices, School of Chemistry and Chemical Engineering, Southeast University, Nanjing 211189, China; Yangtze River Delta Carbon Neutrality Strategy Development Institute, Southeast University, Nanjing 210096, China.
MIIT Key Laboratory of Advanced Display Materials and Devices, School of Materials Science and Engineering, Nanjing University of Science and Technology, Nanjing 210094, Jiangsu, China.
J Colloid Interface Sci. 2025 Feb;679(Pt A):109-118. doi: 10.1016/j.jcis.2024.09.238. Epub 2024 Sep 30.
Nickel-based catalysts are suitable for water splitting to generate hydrogen. However, the low conductivity and weak stability have always been urgent issues to be addressed in nickel-based catalysts. Fe-doped nickel oxide/nickel phosphide (Fe-NiO/NiP) was prepared as a bifunctional electrocatalyst by doping metal and constructing heterogeneous interface. The introduction of Fe contributed to the reinforced interfacial coupling effect of NiO/NiP to promote charge transfer and accelerate reaction kinetics. The heterojunction regulated the interfacial charge density between NiO and NiP to improve the electronic environment of Ni and enhance conductivity. The O-Fe-P bond at the heterogeneous interface induced the directional transfer of electrons and ensured the structure stability. The synergistic effect of Fe doping and heterogeneous interface increased the adsorption energy of *O and coordinated the adsorption energy of *H, advancing the catalytic performance. Fe-NiO/NiP exhibited the overpotential of 242 mV and 141 mV at 10 mA cm for oxygen and hydrogen evolution, respectively.
镍基催化剂适用于水分解制氢。然而，低导电性和弱稳定性一直是镍基催化剂亟待解决的问题。通过掺杂金属和构建异质界面，制备了铁掺杂氧化镍/磷化镍（Fe-NiO/NiP）双功能电催化剂。铁的引入有助于增强NiO/NiP的界面耦合效应，促进电荷转移并加速反应动力学。异质结调节了NiO和NiP之间的界面电荷密度，改善了Ni的电子环境并提高了导电性。异质界面处的O-Fe-P键诱导了电子的定向转移并确保了结构稳定性。铁掺杂和异质界面的协同效应增加了O的吸附能并协调了H的吸附能，提升了催化性能。Fe-NiO/NiP在10 mA cm时析氧和析氢的过电位分别为242 mV和141 mV。
