Single-atom Cu anchored catalysts for photocatalytic renewable H2 production with a quantum efficiency of 56%

Yumin Zhang, Jianhong Zhao, Hui Wang, Bin Xiao, Wen Zhang, Xinbo Zhao, Tianping Lv, Madasamy Thangamuthu, Jin Zhang, Yan Guo, Jiani Ma, Lina Lin, Junwang Tang (), Rong Huang () and Qingju Liu ()
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Yumin Zhang: National Center for International Research on Photoelectric and Energy Materials, School of Materials and Energy, Yunnan University
Jianhong Zhao: National Center for International Research on Photoelectric and Energy Materials, School of Materials and Energy, Yunnan University
Hui Wang: University College London
Bin Xiao: National Center for International Research on Photoelectric and Energy Materials, School of Materials and Energy, Yunnan University
Wen Zhang: Northwest University
Xinbo Zhao: National Center for International Research on Photoelectric and Energy Materials, School of Materials and Energy, Yunnan University
Tianping Lv: National Center for International Research on Photoelectric and Energy Materials, School of Materials and Energy, Yunnan University
Madasamy Thangamuthu: University College London
Jin Zhang: National Center for International Research on Photoelectric and Energy Materials, School of Materials and Energy, Yunnan University
Yan Guo: Northwest University
Jiani Ma: Northwest University
Lina Lin: East China Normal University
Junwang Tang: University College London
Rong Huang: East China Normal University
Qingju Liu: National Center for International Research on Photoelectric and Energy Materials, School of Materials and Energy, Yunnan University

Nature Communications, 2022, vol. 13, issue 1, 1-10

Abstract: Abstract Single-atom catalysts anchoring offers a desirable pathway for efficiency maximization and cost-saving for photocatalytic hydrogen evolution. However, the single-atoms loading amount is always within 0.5% in most of the reported due to the agglomeration at higher loading concentrations. In this work, the highly dispersed and large loading amount (>1 wt%) of copper single-atoms were achieved on TiO2, exhibiting the H2 evolution rate of 101.7 mmol g−1 h−1 under simulated solar light irradiation, which is higher than other photocatalysts reported, in addition to the excellent stability as proved after storing 380 days. More importantly, it exhibits an apparent quantum efficiency of 56% at 365 nm, a significant breakthrough in this field. The highly dispersed and large amount of Cu single-atoms incorporation on TiO2 enables the efficient electron transfer via Cu2+-Cu+ process. The present approach paves the way to design advanced materials for remarkable photocatalytic activity and durability.

Date: 2022
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DOI: 10.1038/s41467-021-27698-3

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