单原子催化
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- 英文论文题名：A New Frontier in Heterogeneous Catalysis——Single-Atom-Catalysis
- 论文作者：王爱琴 ; 乔波涛 ; 杨小峰 ; 林坚 ; 魏海生 ; 张磊磊 ; 刘晓艳 ; 张涛
- 英文论文作者：Aiqin Wang ; Botao Qiao ; Xiaofeng Yang ; Jian Lin ; Haisheng Wei ; Leilei Zhang ; Xiaoyan Liu ; Tao Zhang ; State Key Laboratory of Catalysis ; Dalian Institute of Chemical Physics ; Chinese Academy of Sciences
- 年：2016
- 作者机构：中国科学院大连化学物理研究所催化基础国家重点实验室;
- 论文关键词：单原子催化剂 ; 金属-载体相互作用 ; 合金单原子
- 会议召开时间：2016-07-01
- 会议录名称：中国化学会第30届学术年会摘要集-第十五分会：表界面结构调控与催化
- 语种：中文
- 分类号：O643.36
- 学会代码：ZGHY
- 会议名称：中国化学会第30届学术年会-第十五分会 ; 表界面结构调控与催化
- 会议地点：中国辽宁大连
- 主办单位：中国化学会
- 学会名称：中国化学会
- 页数：1
- 文件大小：143k
- 原文格式：D
- 会议级别：全国
摘要
负载型金属催化剂是多相催化剂中最重要的一类催化剂,广泛应用于能源转化、环境催化以及精细化工领域。为了提高金属催化剂的原子利用率,一般将金属活性组分高分散于载体上。金属活性组分分散的极限是单原子分散,即,所有的金属活性组分都以单原子的形式分散于载体表面,我们定义该类催化剂为"单原子催化剂"。自从2011年我们课题组首次提出"单原子催化剂"概念以来,单原子催化在最近5年得到了快速发展,已经成为多相催化领域的研究热点。在本报告中,作者将介绍3类典型的单原子催化剂,包括负载型Pt族金属单原子催化剂(Pt/Fe Ox,Ir/Fe Ox,Au/CeO_2等)、合金化单原子催化剂(Au-Pd,Ag-Pd,Zn-Pd),以及M-N-C(M指过渡金属Fe、Co等)催化剂。结合本课题组的实验结果讨论影响单原子分散的主要因素;阐述单原子催化剂在一氧化碳氧化、芳香硝基化合物的选择加氢、乙炔选择加氢等反应中的优异催化性能;揭示单原子催化剂的构效关系。
Heterogeneous catalysts are critical to energy production,pollution control,and fine chemical synthesis.Supported metal catalysts are among the most important heterogeneous catalysts.The efficiency of such catalysts as used in industry is,however,extremely low on a per metal atom basis,because only the surface active-site atoms are used.Catalysts with single-atom dispersion,which we define as the single-atom catalysts(SAC),are thus highly desirable to maximize the atom efficiency.In this presentation,we will show three types of SACs,including reducible oxide supported noble metal SACs,single-atom alloys,and M-N-C(M refers to Co and Fe).The key factors governing the atomic dispersion of active metals are discussed,the catalytic performances of the single-atom catalysts in CO oxidation and chemoselective reduction of nitroarenes and acetylene are presented and compared with nanoparticle counterparts,and the structure-performance relationship is understood based on a series of characterizations and DFT calculations.
Heterogeneous catalysts are critical to energy production,pollution control,and fine chemical synthesis.Supported metal catalysts are among the most important heterogeneous catalysts.The efficiency of such catalysts as used in industry is,however,extremely low on a per metal atom basis,because only the surface active-site atoms are used.Catalysts with single-atom dispersion,which we define as the single-atom catalysts(SAC),are thus highly desirable to maximize the atom efficiency.In this presentation,we will show three types of SACs,including reducible oxide supported noble metal SACs,single-atom alloys,and M-N-C(M refers to Co and Fe).The key factors governing the atomic dispersion of active metals are discussed,the catalytic performances of the single-atom catalysts in CO oxidation and chemoselective reduction of nitroarenes and acetylene are presented and compared with nanoparticle counterparts,and the structure-performance relationship is understood based on a series of characterizations and DFT calculations.
引文
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[2]Yang,X.;et al.,Acc.Chem.Res.2013,46:1740.
[3]Lin,J.;et al.,J.Am.Chem.Soc.2013,135:15314.
[4]Wei,H.;et al.,Nat.Commun.2014,5:5634.
[5]Pei,G.;et al.,ACS.Catal.2015,5:3717.
[6]Zhou,H.;et al.,ACS Catal.2016,6:1054.
[2]Yang,X.;et al.,Acc.Chem.Res.2013,46:1740.
[3]Lin,J.;et al.,J.Am.Chem.Soc.2013,135:15314.
[4]Wei,H.;et al.,Nat.Commun.2014,5:5634.
[5]Pei,G.;et al.,ACS.Catal.2015,5:3717.
[6]Zhou,H.;et al.,ACS Catal.2016,6:1054.