Issue 11, 2024

An aqueous Zn-polyoxometalate battery for decoupled hydrogen production from alkaline water electrolysis

Abstract

Decoupled water electrolysis is a feasible technique for the large-scale production of high-purity H2, in which heteropolyacids are attractive electron-coupled proton buffers. An aqueous Zn-phosphomolybdic acid battery is designed for the simultaneous generation of reduced phosphomolybdic acid and electricity. The reported Zn-phosphomolybdic acid battery possesses an open circuit voltage of ∼1.50 V, and the coulombic efficiency of the Zn-phosphomolybdic acid battery can remain at a high level (>90%). Furthermore, the reduced phosphomolybdic acid can be used as an active electron-coupled proton buffer for efficient decoupled hydrogen production from alkaline water electrolysis in the presence of highly dispersed ultrafine Pt nanoparticles (∼2.0 nm) on nickel–cobalt hydroxide nanosheets at a low Pt loading (0.4 mg cm−2) as a free-standing electrode.

Graphical abstract: An aqueous Zn-polyoxometalate battery for decoupled hydrogen production from alkaline water electrolysis

Supplementary files

Article information

Article type
Paper
Submitted
10 Mar 2024
Accepted
27 Apr 2024
First published
03 May 2024

Sustainable Energy Fuels, 2024,8, 2446-2450

An aqueous Zn-polyoxometalate battery for decoupled hydrogen production from alkaline water electrolysis

X. Wang, M. Liu, X. Wu, S. Wang, W. Wu and C. Lu, Sustainable Energy Fuels, 2024, 8, 2446 DOI: 10.1039/D4SE00331D

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