DataVXAdvanced MaterialsPaper
journal article·2024-01Open access

Fe Cluster Modified Co9S8 Heterojunction: Highly Efficient Photoelectrocatalyst for Overall Water Splitting and Flexible Zinc‐Air Batteries

Nan Wang, Di Chen, Shunlian Ning, Jiayu Lao, Jinchang Xu, Mi Luo, Weiping Zhang, Jian Chen, Muzi Yang, Fangyan Xie, Yanshuo Jin, Shuhui Sun, Hui Meng

Advanced Materials· Volume 36· Issue 2
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Abstract

Abstract Designing bifunctional low‐cost photo‐assisted electrocatalysts for converting solar and electric energy into hydrogen energy remains a huge challenge. Herein, a heterojunction (Fe cluster modified Co9S8 loaded on carbon nanotubes, Co9S8‐Fe@CNT) for both hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) is demonstrated. Benefiting from the good electronic conductivity and spatial confinement of the carbon skeleton, as well as the electronic structure regulation of the Fe cluster, Co9S8‐Fe@CNT exhibits excellent catalytic performance with a low overpotential of 150 mV for OER and 135 mV for HER at 10 mA cm−2. Upon light irradiation, holes and electrons are generated in the valence band and conduction band of the Co9S8, respectively. Part of the charges are transferred to the interface to facilitate the catalytic reaction, while the remaining are transferred by the electrode. When working as a bifunctional catalyst for overall water splitting, the performance can reach 1.33 V at under light conditions, which is significantly better than 1.52 V in a dark environment. Theoretical calculations revealed lowered Gibbs free energy (∆GH*) of the heterojunction with the effect of Fe modification of Co9S8. This work sheds a new light in designing novel photoelectrochemical materials to convert solar and electric energy into chemical energy.
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Research context

Energy storageNanomaterialsCatalysis & surfaces

OpenAlex topics: Electrocatalysts for Energy Conversion · Advanced Photocatalysis Techniques · Copper-based nanomaterials and applications

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Guangdong Provincial Key Laboratory of Optical Fiber Sensing and Communications Siyuan Laboratory Guangzhou Key Laboratory of Vacuum Coating Technologies and New Energy Materials Guangdong Provincial Engineering Technology Research Center of Vacuum Coating Technologies and New Energy Materials Department of Physics Jinan University Guangzhou 510632 China

Instrumental Analysis & Research Center School of Chemistry Sun Yat‐sen University Guangzhou Guangdong 510275 China

CAS Key Laboratory of Renewable Energy Guangdong Provincial Key Laboratory of New and Renewable Energy Research and Development Guangzhou Institute of Energy Conversion Chinese Academy of Sciences Beijing 100045 China

Guangdong Key Laboratory of Environmental Catalysis and Health Risk Control Guangdong‐Hong Kong‐Macao Joint Laboratory for Contaminants Exposure and Health Institute of Environmental Health and Pollution control Guangdong University of Technology Guangzhou 510006 China

Institut National de la Recherche Scientifique (INRS) Center Énergie Matériaux Télécommunications Varennes Québec J3X 1P7 Canada

Funding

Science and Technology Planning Project of Guangdong Province · Postdoctoral Research Foundation of China · Fundamental Research Funds for the Central Universities · Basic and Applied Basic Research Foundation of Guangdong Province · National Natural Science Foundation of China

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