首页|原位构建多尺度、多孔NiFeZn/NiZn-Ni异质结用于高效全水解

原位构建多尺度、多孔NiFeZn/NiZn-Ni异质结用于高效全水解

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开发高效非贵金属双功能电解水催化剂对于促进析氧反应(OER)和析氢反应(HER)的动力学至关重要.采用电沉积-退火-腐蚀策略,在泡沫镍(NF)表面原位制备一种具有三重异质界面的自支撑、多尺度多孔NiFeZn/NiZn-Ni异质结催化剂(NiFeZn/NiZn-Ni/NF).独特的多界面工程和三维多孔骨架显著提高了物质传输效率,增强了电子相互作用,实现了超强的水分解双功能电催化性能.在碱性溶液中及600mA/cm2的电流密度下,NiFeZn/NiZn-Ni/NF催化剂使HER和OER的过电位分别降低至187和320 mV,且连续催化超过150 h几乎无活性损失.此外,使用NiFeZn/NiZn-Ni/NF作为阴极和阳极组装的电解槽分别在1.796和1.901 V的电池电压下获得了600和1000 mA/cm2的电流密度,并在50 mA/cm2电流密度和时间超过100 h条件下仍保持极高的稳定性.NiFeZn/NiZn-Ni/NF作为低成本、高效的双功能催化剂在全水解领域显示出潜在的应用前景.
In-situ building of multiscale porous NiFeZn/NiZn-Ni heterojunction for superior overall water splitting
The development of efficient nonprecious bifunctional electrocatalysts for water electrolysis is crucial to enhance the sluggish kinetics of the oxygen evolution reaction(OER)and hydrogen evolution reaction(HER).A self-supporting,multiscale porous NiFeZn/NiZn-Ni catalyst with a triple interface heterojunction on nickel foam(NF)(NiFeZn/NiZn-Ni/NF)was in-situ fabricated using an electroplating-annealing-etching strategy.The unique multi-interface engineering and three-dimensional porous scaffold significantly modify the mass transport and electron interaction,resulting in superior bifunctional electrocatalytic performance for water splitting.The NiFeZn/NiZn-Ni/NF catalyst demonstrates low overpotentials of 187 mV for HER and 320 mV for OER at a current density of 600 mA/cm2,along with high durability over 150 h in alkaline solution.Furthermore,an electrolytic cell assembled with NiFeZn/NiZn-Ni/NF as both the cathode and anode achieves the current densities of 600 and 1000 mA/cm2 at cell voltages of 1.796 and 1.901 V,respectively,maintaining the high stability at 50 mA/cm2 for over 100 h.These findings highlight the potential of NiFeZn/NiZn-Ni/NF as a cost-effective and highly efficient bifunctional electrocatalyst for overall water splitting.

NiFeZn alloymultiple interfaceporous structuredealloyingoverall water splitting

李雅馨、杨红晓、张秋萍、简天真、马文庆、徐彩霞、周秋霞

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济南大学前沿交叉科学研究院(iAIR),济南 250022

西南医科大学医学信息与工程学院,泸州 646000

NiFeZn合金 多重界面 多孔结构 脱合金化 全水解

National Natural Science Foundation of ChinaNatural Science Foundation of Shandong Province,ChinaNatural Science Foundation of Shandong Province,ChinaNatural Science Foundation of Shandong Province,ChinaNatural Science Foundation of Shandong Province,ChinaProject of"20 Items of University"of Jinan,ChinaTaishan Scholar Project of Shandong Province,China

52201254ZR2023ME155ZR2020MB090ZR2020QE012ZR2020MB027202228046tsqn202306226

2024

10.1016/S1003-6326(24)66589-1

中国有色金属学报(英文版)
中国有色金属学会

中国有色金属学报(英文版)

CSTPCD
影响因子：1.183
ISSN：1003-6326
年,卷(期)：2024.34(9)
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