双金属片
材料科学
法拉第效率
电化学
格式化
可逆氢电极
铋
电催化剂
锡
纳米颗粒
纳米技术
吸附
催化作用
光化学
化学工程
无机化学
电极
冶金
物理化学
工作电极
金属
有机化学
化学
工程类
作者
Guobin Wen,Dong Un Lee,Bohua Ren,Fathy M. Hassan,Gaopeng Jiang,Zachary P. Cano,Jeff T. Gostick,Eric Croiset,Zhengyu Bai,Lin Yang,Zhongwei Chen
标识
DOI:10.1002/aenm.201802427
摘要
Abstract A highly selective and durable electrocatalyst for carbon dioxide (CO 2 ) conversion to formate is developed, consisting of tin (Sn) nanosheets decorated with bismuth (Bi) nanoparticles. Owing to the formation of active sites through favorable orbital interactions at the Sn‐Bi interface, the Bi‐Sn bimetallic catalyst converts CO 2 to formate with a remarkably high Faradaic efficiency (96%) and production rate (0.74 mmol h −1 cm −2 ) at −1.1 V versus reversible hydrogen electrode. Additionally, the catalyst maintains its initial efficiency over an unprecedented 100 h of operation. Density functional theory reveals that the addition of Bi nanoparticles upshifts the electron states of Sn away from the Fermi level, allowing the HCOO* intermediate to favorably adsorb onto the Bi‐Sn interface compared to a pure Sn surface. This effectively facilitates the flow of electrons to promote selective and durable conversion of CO 2 to formate. This study provides sub‐atomic level insights and a general methodology for bimetallic catalyst developments and surface engineering for highly selective CO 2 electroreduction.
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