Surface modification of CoMoO4 microrod arrays: Highly efficient electrocatalysts for alkaline overall water splitting

被引：0
作者：
Cao, Chaocao [1 ]
Guo, Aixia [1 ]
Zhao, Ziqi [1 ]
Wang, Tiantong [1 ]
Guo, Wen [1 ]
Shi, Yulin [2 ]
Bao, Fuxi [1 ]
机构：
[1] Shihezi Univ, Sch Chem & Chem Engn, Key Lab Green Proc Chem Engn Xinjiang Bingtuan, Shihezi 832003, Peoples R China
[2] Xinjiang Univ, Sch Chem Engn & Technol, State Key Lab Chem & Utilizat Carbon Based Energy, Urumqi 830017, Peoples R China
来源：
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY | 2025年 / 111卷
关键词：
Surface reconstruction; Ferrous gluconate coating; Dual anion doping; Hydrogen evolution reaction; Oxygen evolution reaction; HYDROGEN EVOLUTION REACTION; LAYERED DOUBLE HYDROXIDE; BIFUNCTIONAL ELECTROCATALYSTS; HETEROSTRUCTURE; STRATEGIES; NANOSHEETS;
D O I：
10.1016/j.ijhydene.2025.02.333
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
The development of efficient, low-cost and durable oxygen evolution reaction (OER) and hydrogen evolution reaction (HER) electrocatalysts for water splitting is still urgently needed. Herein, two strategies have been employed to modify the CoMoO4 microrod arrays supported on nickel foam to prepare efficient HER and OER electrocatalysts. For HER, the P/Se co-doped CoMoO4 microrod arrays (PSe-CMO) obtained via a simultaneous phosphorization/selenization process show superior HER performance (overpotential = 211 mV at-300 mA cm- 2). And it is found that the dissolution of Mo, P and Se promotes the formation of Co(OH)2 nanosheets modified with PO43-and SeO32-. For OER, the P/Se co-doped CoMoO4 microrods hybridized with iron and carbon species (PSe-Fe/C-CMO), synthesized by a ferrous gluconate coating treatment, require only an overpotential of 258 mV at 150 mA cm- 2, which can be attributed to the rapid reconstruction of PSe-Fe/C-CMO surface, where the reconstructed FeOOH, PO43- and SeO42- promotes the formation of CoOOH and CoO2. Finally, a two-electrode cell assembled using the PSe-Fe/C-CMO and PSe-CMO as anode electrode and cathode electrode, respectively, possesses outstanding performance with an ultralow cell voltage of 1.677 V at 200 mA cm- 2. This work provides new ideas for the surface modification of CoMo-based materials as electrodes for alkaline water splitting.
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页码：513 / 523
页数：11
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