In:
Angewandte Chemie, Wiley, Vol. 135, No. 52 ( 2023-12-21)
Abstract:
Developing novel synthesis technologies is crucial to expanding bifunctional electrocatalysts for energy‐saving hydrogen production. Herein, we report an ambient and controllable γ‐ray radiation reduction to synthesize a series of noble metal nanoparticles anchored on defect‐rich manganese oxides (M@MnO 2‐x , M=Ru, Pt, Pd, Ir) for glycerol‐assisted H 2 evolution. Benefiting from the strong penetrability of γ‐rays, nanoparticles and defect supports are formed simultaneously and bridged by metal‐oxygen bonds, guaranteeing structural stability and active site exposure. The special Ru−O−Mn bonds activate the Ru and Mn sites in Ru@MnO 2‐x through strong interfacial coordination, driving glycerol electrolysis at low overpotential. Furthermore, only a low cell voltage of 1.68 V is required to achieve 0.5 A cm −2 in a continuous‐flow electrolyzer system along with excellent stability. In situ spectroscopic analysis reveals that the strong interfacial coordination in Ru@MnO 2‐x balances the competitive adsorption of glycerol and OH* on the catalyst surface. Theoretical calculations further demonstrate that the defect‐rich MnO 2 support promotes the dissociation of H 2 O, while the defect‐regulated Ru sites promote deprotonation and hydrogen desorption, synergistically enhancing glycerol‐assisted hydrogen production.
Type of Medium:
Online Resource
ISSN:
0044-8249
,
1521-3757
DOI:
10.1002/ange.v135.52
DOI:
10.1002/ange.202314569
Language:
English
Publisher:
Wiley
Publication Date:
2023
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