Fe-Doped Ni/Co-Based Selenide Hierarchical Nanosheet Arrays as Self-Supporting Bifunctional Electrocatalysts for Overall Water Splitting

被引：15
作者：
Fan, Xiaoyu [1 ]
Ding, Hui [1 ]
Huang, Tingting [1 ]
Liu, Xia [1 ]
Xiao, Juan [1 ]
Xie, Mengyuan [1 ]
Xu, Guancheng [1 ]
Zhang, Li [1 ,2 ]
机构：
[1] Xinjiang Univ, Coll Chem, State Key Lab Chem & Utilizat Carbon Based Energy, Urumqi 830017, Xinjiang, Peoples R China
[2] Xinjiang Univ, Coll Chem Engn, Urumqi 830017, Xinjiang, Peoples R China
来源：
ACS APPLIED NANO MATERIALS | 2024年 / 7卷 / 10期
基金：
中国国家自然科学基金;
关键词：
bifunctional electrocatalyst; overall water splitting; hierarchical nanosheet arrays; bimetallic selenides; Fe-doping; LAYERED DOUBLE HYDROXIDE; EFFICIENT ELECTROCATALYST; METAL; EVOLUTION; HETEROSTRUCTURE; NANOPARTICLES; CONSTRUCTION; STRATEGIES;
D O I：
10.1021/acsanm.4c01126
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
It is necessary to optimize the electrocatalytic activity of an electrocatalyst by means of morphology and composition regulation. Herein, Fe-doped bimetallic selenide hierarchical nanosheet arrays grown on nickel foam (Fe-NiCoSe/NiCoSe/NF) are obtained for overall water splitting. The Fe-NiCoSe/NiCoSe/NF is fabricated by selenizing the NiCoFe Prussian blue analogue (NiCoFe-PBA) growing on a NiCo-layered double hydroxide (NiCo-LDH). Benefiting from the hierarchical nanosheet arrays, the synergistic effect of the bimetallic selenides, as well as the electronic structure rearrangement caused by Fe-doping, the Fe-NiCoSe/NiCoSe/NF catalyst exhibits low overpotentials of 120 mV for hydrogen evolution reaction (HER) and 199 mV for oxygen evolution reaction (OER) at 10 mA<middle dot>cm(-2) in 1.0 M KOH. In addition, when used as a bifunctional electrocatalyst for overall water splitting, the Fe-NiCoSe/NiCoSe/NF requires a cell voltage of 1.93 V (1.82 V) to reach 100 mA<middle dot>cm(-2) (50 mA<middle dot>cm(-2)). Additionally, Fe-NiCoSe/NiCoSe/NF exhibits prolonged durability lasting for 150 h at 10 mA<middle dot>cm(-2). This work provides a reasonable idea for designing a hierarchical nanostructured bifunctional electrocatalyst toward overall water splitting by regulating the structure and composition.
引用
收藏
页码：11530 / 11540
页数：11
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