Coupling hydrothermal and photothermal single-atom catalysis toward excellent water splitting to hydrogen

Abstract

© 2020 Elsevier B.V. Photocatalytic hydrogen evolution reaction (PER) suffers from deficient solar light efficiency, high cost of noble-metal cocatalysts and low responses to visible and infrared light. In this article, we report single-atom silver incorporated g-C3N4 (SAAg-g-CN) as a low-cost and stable catalyst with higher activities in PER and solar-heat-assisted PER processes than Ag nanoparticle decorated g-C3N4 (AgNP-g-CN) and PtNP-g-C3N4. The excellent activity of SAAg-g-CN is benefited from the proper Gibbs free energy of the adsorbed hydrogen atom (ΔGH*) and robust structure of N-Ag bonding of the SAAg-g-CN. The PER rate of SAAg-g-CN at 55 °C was doubled as compared to that at 25 °C, meanwhile, AgNP-g-CN and PtNP-g-CN showed descending PER performances, due to the agglomeration of metal NPs. This work demonstrates the ultrahigh photoactivity and photothermal stability of SAAg-g-CN, and its potential in facilitating the full exploitation of solar energy.

RAS ID

32804

Document Type

Journal Article

Date of Publication

2021

Volume

283

Funding Information

Australian Research Council

School

School of Engineering

Grant Number

ARC Number : DP150103026DP170104264DP150102044DP180100731 DP180100568

Grant Link

http://purl.org/au-research/grants/arc/DP150103026 http://purl.org/au-research/grants/arc/DP170104264 http://purl.org/au-research/grants/arc/DP150102044 http://purl.org/au-research/grants/arc/DP180100731 http://purl.org/au-research/grants/arc/DP180100568

Copyright

subscription content

Publisher

Elsevier

Comments

Li, X., Zhao, S., Duan, X., Zhang, H., Yang, S. Z., Zhang, P., … Wang, S. (2021). Coupling hydrothermal and photothermal single-atom catalysis toward excellent water splitting to hydrogen. Applied Catalysis B: Environmental, 283, article 119660. https://doi.org/10.1016/j.apcatb.2020.119660

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Link to publisher version (DOI)

10.1016/j.apcatb.2020.119660