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Low‐Coordinated Edge Sites on Ultrathin Palladium Nanosheets Boost Carbon Dioxide Electroreduction Performance
Author(s) -
Zhu Wenjin,
Zhang Lei,
Yang Piaoping,
Hu Congling,
Luo Zhibin,
Chang Xiaoxia,
Zhao ZhiJian,
Gong Jinlong
Publication year - 2018
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.201806432
Subject(s) - overpotential , palladium , nanomaterial based catalyst , faraday efficiency , electrochemistry , catalysis , adsorption , electrochemical reduction of carbon dioxide , materials science , enhanced data rates for gsm evolution , chemical engineering , hexagonal crystal system , inorganic chemistry , nanotechnology , chemistry , crystallography , carbon monoxide , electrode , organic chemistry , computer science , telecommunications , engineering
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.