Designing 2D carbon dot nanoreactors for alcohol oxidation coupled with hydrogen evolution

Qitao Chen, Baodong Mao (), Yanhong Liu (), Yunjie Zhou, Hui Huang, Song Wang, Longhua Li (), Wei-Cheng Yan (), Weidong Shi () and Zhenhui Kang ()
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Qitao Chen: Jiangsu University
Baodong Mao: Jiangsu University
Yanhong Liu: Jiangsu University
Yunjie Zhou: Soochow University
Hui Huang: Soochow University
Song Wang: Hubei University of Arts and Science
Longhua Li: Jiangsu University
Wei-Cheng Yan: Jiangsu University
Weidong Shi: Jiangsu University
Zhenhui Kang: Soochow University

Nature Communications, 2024, vol. 15, issue 1, 1-14

Abstract: Abstract The coupled green energy and chemical production by photocatalysis represents a promising sustainable pathway, which poses great challenges for the multifunction integration of catalytic systems. Here we show a promising green photocatalyst design using Cu-ZnIn2S4 nanosheets and carbon dots as building units, which enables the integration of reaction, mass transfer, and separation functions in the nano-space, mimicking a nanoreactor. This function integration results in great activity promotion for benzyl alcohol oxidation coupled H2 production, with H2/benzaldehyde production rates of 45.95/46.47 mmol g−1 h−1, 36.87 and 36.73 times to pure ZnIn2S4, respectively, owning to the enhanced charge accumulation and mass transfer according to in-situ spectroscopies and computational simulations of the built-in electrical field. Near-unity selectivity of benzaldehyde is achieved via the effective separation enabled by the Cu(II)-mediated conformation flipping of the intermediates and subsequent π-π conjugation. This work demonstrates an inspiring proof-of-concept nanoreactor design of photocatalysts for coupled sustainable systems.

Date: 2024
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DOI: 10.1038/s41467-024-52406-2

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