Ultra-low potential formaldehyde electrooxidation to formate and H 2 on an Ag/Ag 2 O heterostructure catalyst

作者：Haitao Shi, Rui Zhang, Chongchong Wang, Xiaoping Kong, Linlin Pan, Mei‐Jie Wei, Wei Wang, Weixin Lv, Lei Wang · 发表于：Nano Research · 年份：2024 · DOI：10.26599/nr.2025.94907110 · 被引用次数：5 · 研究领域：Catalysis and Oxidation Reactions、Catalytic Processes in Materials Science、Oxidative Organic Chemistry Reactions

Formaldehyde oxidation reaction (FOR) is a promising reaction alternative to the anodic oxygen evolution reaction (OER) owing to its ultra-low electrolysis potential and ability to produce formate and hydrogen gas. In this work, the electrode for FOR is prepared using Ag/Ag 2 O nanoparticles (Ag/Ag 2 O NPs) covered with Nafion membrane as the catalysts modified onto nickel foam (NF). Ag/Ag 2 O NPs@NF exhibits significantly higher FOR activity than Ag NPs@NF and Ag 2 O NPs@NF. At 100 mA·cm −2 , the FOR potential on the Ag/Ag 2 O NPs@NF electrode is only 0.16 V (vs. RHE). Meanwhile, the Faradaic efficiencies can reach up to 100% for both formate and H 2 produced by FOR. Density functional theory (DFT) calculations indicate that the Ag/Ag 2 O heterostructure exhibits lower reaction energy barriers for generating formate and H 2 than pure Ag and Ag 2 O. This work introduces a new synthetic approach for developing novel FOR catalysts and offers insights into the potential application prospects of FOR.