Fe-Doped Ni3S2/NixP Heterojunction with Enhanced Electron Transfer for Efficient Electrochemical Water Splitting
Fe-Doped Ni3S2/NixP Heterojunction with Enhanced Electron Transfer for Efficient Electrochemical Water Splitting
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DOI：
10.1021/acs.jpcc.3c06622
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发表时间：
2023-12
期刊：
影响因子：
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通讯作者：
Yu‐Xuan Xiao;Zhen-Zhao He;Licheng Bai;Qiang Chen;Jie Ying
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文献类型：
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作者：
Yu‐Xuan Xiao;Zhen-Zhao He;Licheng Bai;Qiang Chen;Jie Ying
电化学水裂解是一种重要的能量转化过程，需要高活性、高耐久性和低成本的析氢/析氧催化剂来制备可持续的绿色氢气。过渡金属硫化物（TMS）作为一种廉价的双功能催化剂已被广泛研究，但其活性和稳定性并不令人满意。本文报道了一种简单的两步合成方法，即先溶剂热法，再磷化法，在泡沫镍上制备Fe掺杂的Ni 3S 2/NixP异质结（简称Fe-Ni 3S 2/NixP/NF）。磷化处理使Fe-Ni 3S 2/NixP/NF表面粗糙，具有纳米棒阵列形貌和增强的电子转移。与未磷化样品（Fe-Ni 3S 2/NF）和贵金属基基准催化剂相比，Fe-Ni 3S 2/NixP/NF表现出上级OER、HER和总体水裂解性能，具有低过电位，并且在耐久性测试后电位几乎不变。这项工作为设计高性能双功能TMS基纳米材料实现电催化水裂解提供了新的思路。
Electrochemical water splitting is a significant energy conversion process to produce sustainable and green hydrogen, which demands highly active, highly durable, and low-cost hydrogen evolution reaction (HER)/oxygen evolution reaction (OER) electrocatalysts. Transition metal sulfides (TMS) have been widely explored as low-cost bifunctional catalysts for electrochemical water splitting, but their activities and stabilities are not satisfactory. Herein, we report a facile two-step synthesis of Fe-doped Ni3S2/NixP heterojunction on nickel foam (denoted as Fe–Ni3S2/NixP/NF) by first solvothermal and then phosphorization. Phosphorization treatment provides Fe–Ni3S2/NixP/NF with a rough surface with a nanorod array morphology and enhanced electron transfer. Compared to the nonphosphorized samples (Fe–Ni3S2/NF) and noble metal-based benchmark catalysts, Fe–Ni3S2/NixP/NF exhibits superior OER, HER, and overall water splitting performances with low overpotentials and nearly unchanged potential after durability tests. This work sheds new light on the design of high-performance bifunctional TMS-based nanomaterials toward electrocatalytic water splitting.