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Engineering S-scheme W18O49/ZnIn2S4 heterojunction by CoxP nanoclusters for enhanced charge transfer capability and solar hydrogen evolution.

Authors :
Liu, Xiaojie
Liu, Erkang
Wang, Zixian
Zhang, Wen
Dou, Mingyu
Yang, Hua
An, Changhua
Li, Dacheng
Dou, Jianmin
Source :
Nano Research; Sep2024, Vol. 17 Issue 9, p8095-8103, 9p
Publication Year :
2024

Abstract

Enhancement of the light-absorption response and utilization of the photogenerated carriers represent a robust strategy for the design of high-performance photocatalyst. In this work, grafting Co<subscript>x</subscript>P nanoclusters onto S-scheme heterojunction of W<subscript>18</subscript>O<subscript>49</subscript>/ZnIn<subscript>2</subscript>S<subscript>4</subscript> (WO/ZIS-Co<subscript>x</subscript>P) with strong response to the ultraviolet–visible–near infrared ray (UV–vis–NIR) region has been achieved, which possesses efficient electron-transfer-channel, and boosts charge-separation and transport kinetics. The as-prepared WO/ZIS-Co<subscript>x</subscript>P yields an impressive solar-driven hydrogen production rate of 45 mmol·g<superscript>−1</superscript>·h<superscript>−1</superscript>. The increased photocatalytic performance is attributed to the synergistic effect of the composite catalyst: (1) The local surface plasmon resonance-induced "hot electron" injection of W<subscript>18</subscript>O<subscript>49</subscript> significantly increases the electron density; (2) the engineered S-scheme directional electron transfer promotes charge separation and enhances the reducing capability of photoexcited electrons; and (3) Co<subscript>x</subscript>P as electron-trap site for accelerating surface proton reduction reaction. This work provides a platform to impart nonprecious co-catalyst for engineering S-scheme heterojunction, serving a class of efficient solar-driven photocatalyst towards hydrogen production. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
19980124
Volume :
17
Issue :
9
Database :
Complementary Index
Journal :
Nano Research
Publication Type :
Academic Journal
Accession number :
179142690
Full Text :
https://doi.org/10.1007/s12274-024-6773-4