材料科学
钴
星团(航天器)
析氧
Atom(片上系统)
电催化剂
氧气
生产(经济)
氧原子
纳米技术
化学工程
结晶学
物理化学
冶金
分子
电化学
电极
有机化学
嵌入式系统
计算机科学
化学
经济
工程类
宏观经济学
程序设计语言
作者
Hangyuan Zhang,Li Wang,Pengfei Duan,Qi Lei,Beibei Li,Daming Zhu,Meng Tian,Jingyu Sun,Jianhui Sun,Yifei Wang
标识
DOI:10.1002/adfm.202417090
摘要
Abstract The cooperation between metal single atom (SA) and atomic cluster (AC) within an electrocatalyst has showcased enormous potential in 2e − oxygen reduction reaction (ORR) for hydrogen peroxide (H 2 O 2 ) production. Nevertheless, developing an SA‐AC catalyst with the synergy of optimized functional groups to afford advanced catalytic capability has been challenging. Herein, a new and highly effective catalyst with tandem cobalt SA‐AC moieties and C─O─C functional group decorations anchored over carbon nanotubes is presented, which is denoted as Co SA‐AC(C─O─C). As an electrocatalyst, Co SA‐AC(C─O─C) demonstrates favorable activity, selectivity, and stability for 2e − ORR, delivering an onset potential of 0.72 V (vs RHE) and an H 2 O 2 selectivity of 97.6% in 0.5 m H 2 SO 4 . In a flow‐cell reactor, the Co SA‐AC(C─O─C) realizes an H 2 O 2 production rate of 3.88 mol g cat −1 h −1 at 300 mA cm −2 targeting on‐site pollutant treatment by integrating a Fenton‐like process. The theoretical computations guide the selection of C─O─C among the functional group decorations and reveal the actual active sites to locate at Co SAs, while the synergistic effect of Co ACs and C─O─C groups helps optimize the * OOH binding and modulate the electronic structure.
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