Intrinsic defects in biomass-derived carbons facilitate electroreduction of CO2

doi:10.1007/s12274-020-2683-2

CORC > 宁波材料技术与工程研究所 > 中国科学院宁波材料技术与工程研究所 > 2020专题

	Intrinsic defects in biomass-derived carbons facilitate electroreduction of CO2
	Chen, Mengjie ; Wang, Shuai ; Zhang, Haiyan ; Zhang, Ping ; Tian, Ziqi ; Lu, Min ; Xie, Xiaoji ; Huang, Ling ; Huang, Wei
刊名	NANO RESEARCH
	2020
卷号	13 期号:3 页码:729-735
关键词	ELECTROCATALYTIC REDUCTION OXYGEN REDUCTION ELECTROCHEMICAL REDUCTION MESOPOROUS CARBON DIOXIDE REDUCTION ACTIVATED CARBON EFFICIENT FORMATE SITES
DOI	10.1007/s12274-020-2683-2
英文摘要	Developing efficient carbon-based metal-free electrocatalysts can bridge the gap between laboratory studies and practical applications of CO2 reduction. However, along with the ambiguous understanding of the active sites in carbon-based electrocatalysts, carbon-based electrocatalysts with high selectivity and satisfactory stability for electroreduction of CO2 remain rare. Here, using the nitrogen rich silk cocoon as a precursor, carbon-based electrocatalysts with intrinsic defects can be prepared for efficient and long-term electroreduction of CO2 by a simple two-step carbonization. The obtained electrocatalyst can catalyze CO2 reduction to CO with a Faradaic efficiency of similar to 89% and maintain good selectivity for about 10 days. Particularly, our experimental studies suggest that in-plane defects are the main active sites on which the rate-determining step for CO2 reduction should be the direct electron transfer to CO2 but not the proton-coupled electron transfer. Further theoretical calculations consistently demonstrate that the intrinsic defects in carbon matrix, particularly the pentagon-containing defects, act as main active sites to accelerate the direct electron transfer for CO2 reduction. In addition, our synthetic approach can convert egg white into efficient catalysts for CO2 electroreduction. These findings, providing new insights into the biomass-derived catalysts, should pave the way for fabricating efficient and stable carbon-based electrocatalysts with catalytically active defects by using naturally abundant precursors.
学科主题	Chemistry ; Science & Technology - Other Topics ; Materials Science ; Physics
内容类型	期刊论文
源URL	[http://ir.nimte.ac.cn/handle/174433/19957]
专题	2020专题
作者单位	1.Tian, ZQ (corresponding author), Chinese Acad Sci, Ningbo Inst Mat Technol & Engn, Ningbo 315201, Peoples R China. 2.Lu, M 3.Xie, XJ (corresponding author), Nanjing Tech Univ, Inst Adv Mat, KLOFE, Nanjing 211816, Peoples R China.
推荐引用方式 GB/T 7714	Chen, Mengjie,Wang, Shuai,Zhang, Haiyan,et al. Intrinsic defects in biomass-derived carbons facilitate electroreduction of CO2[J]. NANO RESEARCH,2020,13(3):729-735.
APA	Chen, Mengjie.,Wang, Shuai.,Zhang, Haiyan.,Zhang, Ping.,Tian, Ziqi.,...&Huang, Wei.(2020).Intrinsic defects in biomass-derived carbons facilitate electroreduction of CO2.NANO RESEARCH,13(3),729-735.
MLA	Chen, Mengjie,et al."Intrinsic defects in biomass-derived carbons facilitate electroreduction of CO2".NANO RESEARCH 13.3(2020):729-735.