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题名: pH effect on electrocatalytic reduction of CO2 over Pd and Pt nanoparticles
作者: Gao, Dunfeng1, 2;  Wang, Jing1, 2;  Wu, Haihua1, 2;  Jiang, Xiaole1, 2;  Miao, Shu3;  Wang, Guoxiong1;  Bao, Xinhe1, 3
关键词: pH effect ;  Electrocatalytic reduction ;  Carbon dioxide ;  Palladium nanoparticles ;  Platinum nanoparticles
刊名: ELECTROCHEMISTRY COMMUNICATIONS
发表日期: 2015-06-01
DOI: 10.1016/j.elecom.2015.03.008
卷: 55, 页:1-5
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences
类目[WOS]: Electrochemistry
研究领域[WOS]: Electrochemistry
英文摘要: Adsorbed hydrogen participates in electrocatalytic reduction of CO2 and competitive hydrogen evolution reaction (HER) simultaneously, and its reaction pathway greatly affects the activity and selectivity of CO2 reduction. In this work, we investigate pH effect on electrocatalytic reduction of CO2 over Pd and Pt nanoparticles (NPs) with a similar size in a pH range from 1.5 to 4.2. Pt NPs completely contribute to HER in the pH range. Over Pd NPs, Faradaic efficiency for CO production at -1.19 V (vs. reversible hydrogen electrode) varies from 3.2% at pH of 1.5 to 93.2% at pH of 42, and current density for CO production reaches maximum at pH of 2.2. The significant enhancement of Faradaic efficiency and current density for CO production over Pd NPs at high pH values is attributed to decreased kinetics of hydrogen evolution reaction by increasing hydrogen binding energy and lowered adsorption affinity of CO-like intermediate compared to Pt. (C) 2015 Elsevier B.V. All rights reserved.
关键词[WOS]: CARBON-DIOXIDE ;  ELECTROCHEMICAL REDUCTION ;  PALLADIUM ELECTRODES ;  HYDROGEN ABSORPTION ;  OXIDATION ;  EVOLUTION ;  ACID ;  SELECTIVITY ;  PLATINUM ;  ENERGY
语种: 英语
WOS记录号: WOS:000355366500001
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/146281
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100039, Peoples R China
3.Chinese Acad Sci, Dalian Inst Chem Phys, Dalian Natl Lab Clean Energy, Dalian 116023, Peoples R China

Recommended Citation:
Gao, Dunfeng,Wang, Jing,Wu, Haihua,et al. pH effect on electrocatalytic reduction of CO2 over Pd and Pt nanoparticles[J]. ELECTROCHEMISTRY COMMUNICATIONS,2015,55:1-5.
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