Ambient Electrosynthesis toward Single‐Atom Sites for Electrocatalytic Green Hydrogen Cycling. Issue 14 (17th February 2023)

• Record Type: Journal Article
• Authors: Zhao, Xin; He, Daping; Xia, Bao Yu; Sun, Yujie; You, Bo
• Is Part Of: Advanced materials. Volume 35:Issue 14(2023)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2023-02-17
• Subjects: ambient electrosynthesis -- electrocatalysis -- fuel cells -- single‐atom sites -- water splitting; Materials -- Periodicals; Chemical vapor deposition -- Periodicals; 620.11
• DOI: 10.1002/adma.202210703
• Languages: English
• ISSNs: 0935-9648

Abstract

Abstract: With the ultimate atomic utilization, well‐defined configuration of active sites and unique electronic properties, catalysts with single‐atom sites (SASs) exhibit appealing performance for electrocatalytic green hydrogen generation from water splitting and further utilization via hydrogen–oxygen fuel cells, such that a vast majority of synthetic strategies toward SAS‐based catalysts (SASCs) are exploited. In particular, room‐temperature electrosynthesis under atmospheric pressure offers a novel, safe, and effective route to access SASs. Herein, the recent progress in ambient electrosynthesis toward SASs for electrocatalytic sustainable hydrogen generation and utilization, and future opportunities are discussed. A systematic summary is started on three kinds of ambient electrochemically synthetic routes for SASs, including electrochemical etching (ECE), direct electrodeposition (DED), and electrochemical leaching–redeposition (ELR), associated with advanced characterization techniques. Next, their electrocatalytic applications for hydrogen energy conversion including hydrogen evolution reaction, oxygen evolution reaction, overall water splitting, and oxygen reduction reaction are reviewed. Finally, a brief conclusion and remarks on future challenges regarding further development of ambient electrosynthesis of high‐performance and cost‐effective SASCs for many other electrocatalytic applications are presented. Abstract : The recent progress in ambient electrosynthesis toward single‐atom sites ranging from nonprecious Fe, Co, Ni, Cu, Zn, V, Cr, Mn, Sn, Pd, and Bi to noble Ru, Rh, Pd, Ag, Ir, Pt, and Au for green hydrogen cycling is reviewed, and further opportunities are discussed. Three electrosynthesis strategies including electrochemical etching, direct electrodeposition, and electrochemical leaching–redeposition are summarized.