Interface-Engineered Co@Co<sub>3</sub>O<sub>4</sub>@NC Nanoparticles on BiVO<sub>4</sub> Photoanodes for Efficient Charge Transfer and Solar Water Oxidation

The employment of Co-based cocatalysts in BiVO4 (BVO) photoanodes is still suffering from inefficient hole transfer to active sites and sluggish charge kinetic processes. To address this issue, we designed a hierarchical dual-shell Co@Co3O4@NC (Co-DS) cocatalyst synthesized via the controlled pyrolysis of CoCo Prussian blue analogs under micro-oxygen conditions. The designed hierarchical structure consists of a graphitic carbon shell that encases the Co3O4 interlayer, which is abundant in OER-active sites, coupled with a metallic Co core that enhances hole accumulation and charge transfer across interfaces. The optimized Mo-BVO/Co-DS photoanode achieves a photocurrent density of 4.95 mA/cm2 at 1.23 VRHE, representing a 129% enhancement over pristine BVO (2.16 mA/cm2). This work provides fundamental insights into the design principles of metal-oxide-based cocatalysts for overcoming efficiency limitations in photochemical water oxidation.

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Publication Details

Journal
ACS Applied Energy Materials
Published
2025-09-05
DOI
https://doi.org/10.1021/acsaem.5c01883
Primary Topic
Advanced Photocatalysis Techniques
Type
article
Field-Weighted Citation Impact
0.00

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article

Interface-Engineered Co@Co3O4@NC Nanoparticles on BiVO4 Photoanodes for Efficient Charge Transfer and Solar Water Oxidation

Haoyang Dong, Yiman Zhang, Jiangxin Wang, Yachun Wang et al.
ACS Applied Energy Materials
Advanced Photocatalysis Techniques
article

Interface-Engineered Co@Co3O4@NC Nanoparticles on BiVO4 Photoanodes for Efficient Charge Transfer and Solar Water Oxidation

Haoyang Dong, Yiman Zhang, Jiangxin Wang, Yachun Wang, Danfeng Cui, Minmin Liu, Juan Zhang, Kaixin Zhang, Shuo Li, Weiguo Xu, Zimu Li, Kuanhong Mei
article en

Abstract

The employment of Co-based cocatalysts in BiVO4 (BVO) photoanodes is still suffering from inefficient hole transfer to active sites and sluggish charge kinetic processes. To address this issue, we designed a hierarchical dual-shell Co@Co3O4@NC (Co-DS) cocatalyst synthesized via the controlled pyrolysis of CoCo Prussian blue analogs under micro-oxygen conditions. The designed hierarchical structure consists of a graphitic carbon shell that encases the Co3O4 interlayer, which is abundant in OER-active sites, coupled with a metallic Co core that enhances hole accumulation and charge transfer across interfaces. The optimized Mo-BVO/Co-DS photoanode achieves a photocurrent density of 4.95 mA/cm2 at 1.23 VRHE, representing a 129% enhancement over pristine BVO (2.16 mA/cm2). This work provides fundamental insights into the design principles of metal-oxide-based cocatalysts for overcoming efficiency limitations in photochemical water oxidation.

ACS Applied Energy MaterialsVol. 8(18)
Liaoning University (CN), New York State Department of Transportation (US), Institute of Molecular Functional Materials (CN), GDL (China) (CN), Clean Energy (United States) (US), Green Chemistry (PL), Zhejiang University (CN)
National Natural Science Foundation of China, Natural Science Foundation of Liaoning Province
Openalex Percentile: Top 84%
Advanced Photocatalysis Techniques
DOISourceOpenAlex
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