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Unassisted selective solar hydrogen peroxide production by an oxidised buckypaper-integrated perovskite photocathode

Rashmi Mehrotra, Dongrak Oh and Ji-Wook Jang ()
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Rashmi Mehrotra: Ulsan National Institute of Science and Technology (UNIST)
Dongrak Oh: Ulsan National Institute of Science and Technology (UNIST)
Ji-Wook Jang: Ulsan National Institute of Science and Technology (UNIST)

Nature Communications, 2021, vol. 12, issue 1, 1-9

Abstract: Abstract Hydrogen peroxide (H2O2) is an eco-friendly oxidant and a promising energy source possessing comparable energy density to that of compressed H2. The current H2O2 production strategies mostly depend on the anthraquinone oxidation process, which requires significant energy and numerous organic chemicals. Photocatalyst-based solar H2O2 production comprises single-step O2 reduction to H2O2, which is a simple and eco-friendly method. However, the solar-to-H2O2 conversion efficiency is limited by the low performance of the inorganic semiconductor-based photoelectrodes and low selectivity and stability of the H2O2 production electrocatalyst. Herein, we demonstrate unassisted solar H2O2 production using an oxidised buckypaper as the H2O2 electrocatalyst combined with a high-performance inorganic-organic hybrid (perovskite) photocathode, without the need for additional bias or sacrificial agents. This integrated photoelectrode system shows 100% selectivity toward H2O2 and a solar-to-chemical conversion efficiency of ~1.463%.

Date: 2021
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DOI: 10.1038/s41467-021-26832-5

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