Issue 6, 2023

Gold–nickel phosphide heterostructures for efficient photocatalytic hydrogen peroxide production from real seawater

Abstract

Direct hydrogen peroxide (H2O2) photosynthesis from Earth-abundant seawater provides an attractive path for scalable and cost-effective solar fuel production for the future, but the sluggish half-reaction of water oxidation and unpropitious rapid charge recombination of photocatalysts impede the solar-to-H2O2 conversion efficiency. We report here Au covalently anchored on Ni5P4 (Au@Ni5P4) as an active and durable photocatalyst for non-sacrificial H2O2 synthesis from real seawater. Au@Ni5P4 photoirradiated by λ > 420 nm simulated sunlight efficiently boosts two-electron O2 reduction and four-electron water oxidation, yielding a high solar-to-H2O2 conversion efficiency of 0.29%, along with excellent stability. Mechanism studies reveal that the decoration of plasmonic Au significantly suppresses the charge-carrier recombination and the oxidation of halide ions in seawater assists in the production of H2O2. We envision that this study will allow the future design of more efficient plasmon-mediated photocatalysts and advance their applicability for H2O2 production from seawater.

Graphical abstract: Gold–nickel phosphide heterostructures for efficient photocatalytic hydrogen peroxide production from real seawater

Supplementary files

Article information

Article type
Research Article
Submitted
14 Dez 2022
Accepted
16 Feb 2023
First published
16 Feb 2023

Inorg. Chem. Front., 2023,10, 1907-1918

Gold–nickel phosphide heterostructures for efficient photocatalytic hydrogen peroxide production from real seawater

W. Wang, Q. Luo, J. Li, Y. Li, L. Li, X. Huo, X. Du and N. Wang, Inorg. Chem. Front., 2023, 10, 1907 DOI: 10.1039/D2QI02662G

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