过电位
钯
法拉第效率
纳米材料基催化剂
电化学
催化作用
二氧化碳电化学还原
材料科学
GSM演进的增强数据速率
吸附
六方晶系
无机化学
化学工程
纳米技术
化学
物理化学
结晶学
电极
一氧化碳
有机化学
纳米颗粒
计算机科学
工程类
电信
作者
Wenjin Zhu,Lei Zhang,Ping Yang,Congling Hu,Zhibin Luo,Xiaoxia Chang,Zhi‐Jian Zhao,Jinlong Gong
标识
DOI:10.1002/anie.201806432
摘要
Abstract Electrochemical conversion of carbon dioxide (CO 2 ) to value‐added products is a possible way to decrease the problems resulting from CO 2 emission. Thanks to the eminent conductivity and proper adsorption to intermediates, Pd has become a promising candidate for CO 2 electroreduction (CO 2 ER). However, Pd‐based nanocatalysts generally need a large overpotential. Herein we describe that ultrathin Pd nanosheets effectively reduce the onset potential for CO by exposing abundant atoms with comparatively low generalized coordination number. Hexagonal Pd nanosheets with 5 atomic thickness and 5.1 nm edge length reached CO faradaic efficiency of 94 % at −0.5 V, without any decay after a stability test of 8 h. It appears to be the most efficient among all of Pd‐based catalysts toward CO 2 ER. Uniform hexagonal morphology made it reasonable to build models and take DFT calculations. The enhanced activity originates from mainly edge sites on palladium nanosheets.
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