Electro‐induced Crystallization Over Amorphous Indium Hydroxide Gels Toward Ampere‐Level Current Density Formate Electrosynthesis

• DOI: 10.1002/adfm.202316167
• Publication Date: 2024-01-10T03:50:57Z
• Authors: Jia Yue Zhao; Kai Huang; Changwei Liu; Xuefeng Wu; Yi Ning Xu; Jiayu Li; Minghui Zhu; Sheng Dai; Cheng Lian; Peng Fei Liu; Hua Gui Yang
• Keywords: Electrosynthesis

Abstract Electrochemical CO 2 reduction reaction (CO RR) provides a promising way for producing value‐added fuels and chemicals via renewable electricity. However, the dynamic reconstruction of electrocatalysts atomic active sites hinders in‐depth understanding catalytic mechanism further industrial application, especially under ampere‐level current density conditions. In this work, electro‐induced crystallization is reported over an amorphous Indium hydroxide gel (In gel) catalyst, which generates efficient selective RR. Molecular calculation reveals process can maintain In‐OH species on surface while generating crystallized metallic electroreduction condition; structural characterizations prove that derived partially stable consisting amorphous/crystalline interface, even biased at high polarization potential −4 V versus reversible hydrogen electrode. The resultant crystalized exhibits highly RR performance toward formate up to 1200 mA cm −2 simultaneously with 91.89% Faradaic efficiency, motivate generation rate 20.55 mmol h −1 . operando Raman spectroscopic functional theoretic results demonstrate optimized adsorption *HCOO intermediate enhanced activity selectivity gel.