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Metal-organic framework-derived nano-CoS-enhanced photoelectrochemical water splitting performance of the BiVO4 photoanode

文献类型： 外文期刊

作者： Li, Dongqin 1 ; Chen, Xinchao 2 ; Shao, Mingshi 2 ; Hou, Shushi 2 ; Guo, Jingyi 3 ; Jin, Haoyu 3 ; Yang, Hao 4 ; Chen, Guikui 3 ; Huang, Yongchao 2 ;

作者机构： 1.Guangdong Acad Agr Sci, Inst Qual Stand & Monitoring Technol Agroprod, Guangdong Prov Key Lab Qual & Safety Risk Assessme, Guangzhou 510640, Peoples R China

2.Guangzhou Univ, Inst Environm Res Greater Bay Area, Key Lab Water Qual & Conservat Pearl River Delta, Minist Educ, Guangzhou 510006, Peoples R China

3.South China Agr Univ, Coll Nat Resources & Environm, Guangzhou 510642, Peoples R China

4.Guangxi Univ, Sch Chem & Chem Engn, Guangxi Key Lab Electrochem Energy Mat, Nanning 530004, Peoples R China

期刊名称：JOURNAL OF MATERIALS CHEMISTRY A （ 影响因子：9.5； 五年影响因子：10.3 ）

ISSN： 2050-7488

年卷期： 2025 年 13 卷 28 期

页码：

收录情况： SCI

摘要： The utilization of metal-organic frameworks (MOFs) as oxygen evolution reaction (OER) co-catalysts for BiVO4-based photoelectrochemical (PEC) water splitting is limited by their intrinsic low conductivity and low availability of accessible catalytic metal sites. In this work, we transformed the cobalt-based imidazole-based ZIF-67 catalyst into a MOF-derived CoS cocatalyst through a two-step vulcanization process to construct a novel M-CoS/BiVO4 photoanode. The resulting M-CoS/BiVO4 photoanode demonstrated a photocurrent density of 5.22 mA cm-2 at 1.23 V versus the reversible hydrogen electrode under AM 1.5G light irradiation. Both the experimental results and theoretical calculations indicated that the built-in electric fields of the CoS/BiVO4 heterojunction effectively suppressed charge recombination in the bulk system. Furthermore, the MOF-derived CoS provided active sites with larger specific surface areas and increased the electronic conductivity, which effectively enhanced the charge separation and water oxidation kinetics, promoting the PEC water splitting performance. These findings indicate the potential of this new method in designing highly efficient photoanodes from MOFs.

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