High‐Entropy Alloy Aerogels: A New Platform for Carbon Dioxide Reduction

• DOI: 10.1002/adma.202209242
• Publication Date: 2022-11-14T10:02:07Z
• Authors: Hanjun Li; Honggang Huang; Yao Chen; Feili Lai; Hui Fu; Longsheng Zhang; Nan Zhang; Shuxing Bai; Tianxi Liu
• Keywords: 13. Climate action; 01 natural sciences; 7. Clean energy; 0104 chemical sciences

High-entropy alloy aerogels (HEAAs) combined with the advantages of high-entropy alloys and are prospective new platforms in catalytic reactions. However, due to differences reduction potentials miscibility behavior different metals, realization HEAAs a single phase is still great challenge. Herein, series fabricated via freeze-thaw method as highly active durable electrocatalysts for carbon dioxide reaction (CO2 RR). Especially, PdCuAuAgBiIn can achieve Faradaic efficiency (FE) C1 products almost 100% from -0.7 -1.1 V versus reversible hydrogen electrode (VRHE ), maximum FE formic acid (FEHCOOH ) 98.1% at VRHE , outperforming particles (HEAPs) Pd metallic (MAs). Specifically, current density FEHCOOH 200 mA cm-2 87% flow cell. The impressive CO2 RR performance attributed strong interactions between metals surface unsaturated sites, which regulate electronic structures allow optimal HCOO* intermediate adsorption desorption onto catalysts enhance HCOOH production. work not only provides facile synthetic strategy fabricate HEAAs, but also opens avenue development efficient beyond.