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Updated: Feb 9, 2026

Scalable Syntheses of Graphene Oxide and Reduced Graphene Oxide using Cascade Design Oxidation and Highly Basic Reduction Reactions
Published on: July 3, 2025
Heterojunctions of silver-iron oxide on graphene for laser-coupled oxygen reduction reactions
Wei-Quan Chen1, Min-Chuan Chung, Joey Andrew A Valinton
1Department of Chemistry, National Sun Yat-sen University, Kaohsiung, 80424, Taiwan. chunhu.chen@mail.nsysu.edu.tw.
Abstract:
We report a two-step hybridization of N-doped graphene and Ag-decorated Fe2O3 hematite to realize a balanced oxygen adsorption/desorption equilibrium and a laser-coupled ORR (LORR). The stable plateau currents with n values of 3.9 in a wide potential range (0.2-0.7 V) and 7.5% peroxide inhibition of the LORR are found to be directly associated with the Ag/Fe2O3 heterojunction, where interactions of semiconductor band gap excitation and plasmonic resonance-induced hot electrons are proposed to occur.
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