Incorporating Transition Metals(Ta/Co) into Nitrogen-Doped Carbon as CEs for DSSCs

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• 英文论文题名：Incorporating Transition Metals(Ta/Co) into Nitrogen-Doped Carbon as CEs for DSSCs
• 论文作者：李晶 ; Xiao Zhou ; Yuzhi Hou ; Wen Fang ; Taihong Zhang ; Yanfang Liu ; 云斯宁
• 英文论文作者：Jing Li ; Xiao Zhou ; Yuzhi Hou ; Wen Fang ; Taihong Zhang ; Yanfang Liu ; Sining Yun ; Functional Materials Laboratory(FML) ; Xi’an University of Architecture and Technology ; School of Materials Science&Engineering ; North University of China ; Key Laboratory of Nanomaterials and Nanotechnology of Shaanxi Province
• 年：2017
• 作者机构：西安建筑科技大学,材料与矿资学院,功能材料研究所;中北大学,材料科学与工程学院;陕西省纳米材料与纳米技术重点实验室;
• 英文论文关键词：Transition metals ; nitrogen-doped carbon ; electrocatalytic activity ; counter electrode ; dye-sensitized solar cells
• 会议召开时间：2017-05-27
• 会议录名称：第四届新型太阳能电池学术研讨会论文集
• 英文会议录名称：Abstract Book of the 4th Conference on New Generation Solar Cells
• 语种：英文
• 分类号：TM914.4
• 学会代码：ZKYQ
• 会议名称：第四届新型太阳能电池学术研讨会
• 会议地点：中国北京
• 主办单位：中国可再生能源学会光化学专业委员会
• 学会名称：中国科学院物理研究所清洁能源实验室
• 页数：1
• 文件大小：679k
• 原文格式：D
• 会议级别：全国

摘要

Carbon materials are potential electrode materials in new energy devices because of their distinct advantages including low cost, high surface area, and high electric conductivity.Nitrogen doping can effectively improve the performance of carbon electrode materials, and introducing transition metals into nitrogen-doped carbon is a promising strategy to develop high-performance electrode materials.In the present work, we successfully prepared two kinds of metal-incorporated nitrogen-doped carbon materials(Co-N-C and Ta/Co-N-C) by pyrolyzing a cobalt(Ⅱ) imidazolate polymer followed by ion exchange.The as-prepared Ta/Co-N-C materials present a better graphite crystal phase and higher Brunauer-Emmett-Teller(BET) specific surface area(421.5 m~2/g) than that of Co-N-C(354.7 m~2/g).As counter electrode(CE) materials in I-mediated dye-sensitized solar cells(DSSCs), Ta/Co-N-C exhibits a superior catalytic activity and electrochemical stability than Co-N-C, resulting in a high power conversion efficiency(PCE) of 6.50%, which is 97% of the level achieved using a Pt electrode(6.71%) in DSSCs.These Ta-and Co-incorporated nitrogen-doped carbon materials are expected to be used in extensive new energy applications, such as biomass, pollution control and hydrogen generation.
Carbon materials are potential electrode materials in new energy devices because of their distinct advantages including low cost, high surface area, and high electric conductivity.Nitrogen doping can effectively improve the performance of carbon electrode materials, and introducing transition metals into nitrogen-doped carbon is a promising strategy to develop high-performance electrode materials.In the present work, we successfully prepared two kinds of metal-incorporated nitrogen-doped carbon materials(Co-N-C and Ta/Co-N-C) by pyrolyzing a cobalt(Ⅱ) imidazolate polymer followed by ion exchange.The as-prepared Ta/Co-N-C materials present a better graphite crystal phase and higher Brunauer-Emmett-Teller(BET) specific surface area(421.5 m~2/g) than that of Co-N-C(354.7 m~2/g).As counter electrode(CE) materials in I-mediated dye-sensitized solar cells(DSSCs), Ta/Co-N-C exhibits a superior catalytic activity and electrochemical stability than Co-N-C, resulting in a high power conversion efficiency(PCE) of 6.50%, which is 97% of the level achieved using a Pt electrode(6.71%) in DSSCs.These Ta-and Co-incorporated nitrogen-doped carbon materials are expected to be used in extensive new energy applications, such as biomass, pollution control and hydrogen generation.

引文

[1]S.Yun,A.Hagfeldt,T.Ma,Adv.Mater.,2014,26,6210–6237.
    [2]S.Yun,M.Wu,Y.Wang,J.Shi,X.Lin,A.Hagfeldt,T.Ma,Chem SusC hem,2013,6,411-416.