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journal article·2024-08Open access

Black Ultrathin Single‐Crystalline Flakes of CuVP2S6 and CuCrP2S6 for Near‐Infrared‐Driven Photocatalytic Hydrogen Evolution

Bo Lin, Ruihuan Duan, Yonghui Li, Weibo Hua, Yao Zhou, Jiadong Zhou, Jun Di, Xiao Luo, He Li, Wenting Zhao, Guidong Yang, Zheng Liu, Fucai Liu

Advanced Materials· Volume 36· Issue 32
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Abstract

Abstract The development of new near‐infrared‐responsive photocatalysts is a fascinating and challenging approach to acquire high photocatalytic hydrogen evolution (PHE) performance. Herein, near‐infrared‐responsive black CuVP2S6 and CuCrP2S6 flakes, as well as CuInP2S6 flakes, are designed and constructed for PHE. Atom‐resolved scanning transmission electron microscopy images and X‐ray absorption fine structure evidence the formation of ultrathin single‐crystalline sheet‐like structure of CuVP2S6 and CuCrP2S6. The synthetic CuVP2S6 and CuCrP2S6, with a narrow bandgap of ≈1.0 eV, shows the high light‐absorption edge exceeding 1100 nm. Moreover, through the femtosecond‐resolved transient absorption spectroscopy, CuCrP2S6 displays the efficient charge transfer and long charge lifetime (18318.1 ps), which is nearly 3 and 29 times longer than that of CuVP2S6 and CuInP2S6, respectively. In addition, CuCrP2S6, with the appropriate d‐band and p‐band, is thermodynamically favorable for the H+ adsorption and H2 desorption by contrast with CuVP2S6 and CuInP2S6. As a result, CuCrP2S6 exhibits high PHE rates of 9.12 and 0.66 mmol h−1 g−1 under simulated sunlight and near‐infrared light irradiation, respectively, far exceeding other layered metal phospho–sulfides. This work offers a distinctive perspective for the development of new near‐infrared‐responsive photocatalysts.
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Research context

Catalysis & surfaces

OpenAlex topics: Advanced Photocatalysis Techniques · Quantum Dots Synthesis And Properties · 2D Materials and Applications

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

Affiliations

XJTU‐Oxford International Joint Laboratory for Catalysis School of Chemical Engineering and Technology Xi'an Jiaotong University Xi'an 710049 China

School of Materials Science and Engineering Nanyang Technological University Singapore 639798 Singapore

Department of Physics and Tianjin Key Laboratory of Low Dimensional Materials Physics and Preparing Technology School of Sciences Tianjin University Tianjin 300350 China

Advanced Research Institute of Multidisciplinary Science School of Chemistry and Chemical Engineering Beijing Institute of Technology Beijing 100081 China

Key Lab of Advanced Optoelectronic Quantum Architecture and Measurement (Ministry of Education) Beijing Key Lab of Nanophotonics & Ultrafine Optoelectronic Systems School of Physics Beijing Institute of Technology Beijing 100081 China

School of Chemistry and Chemical Engineering National Special Superfine Powder Engineering Research Center Nanjing University of Science and Technology Nanjing 210094 China

School of Optoelectronic Science and Engineering University of Electronic Science and Technology of China Chengdu 611731 China

Funding

National Key Research and Development Program of China · National Natural Science Foundation of China

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