双功能催化剂:多级微介孔金属-有机框架材料负载合金纳米协同催化
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- 英文论文题名：Hierarchically micro-and mesoporous MOF-supported alloy nanocrystals as bifunctional catalysts:Toward cooperative catalysis
- 论文作者：黄远标 ; 曹荣
- 英文论文作者：Yuan-Biao Huang ; Rong Cao ; State Key Laboratory of Structural Chemistry ; Fujian Institute of Research on the Structure of Matter ; Chinese Academy of Sciences
- 年：2016
- 作者机构：中国科学院福建物质结构研究所结构化学国家重点实验室;
- 论文关键词：多级孔金属-有机框架 ; 合金纳米晶 ; 协同催化 ; 醇脱氢 ; 多相催化
- 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-第三十二分会： 多孔功能材料
- 语种：中文
- 分类号：TB383.1;O643.36
- 学会代码：ZGHY
- 会议名称：中国化学会第30届学术年会-第三十二分会 ; 多孔功能材料
- 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：129k
- 原文格式：D
- 会议级别：全国
摘要
MOFs在负载纳米颗粒进行催化时一般仅仅是作为载体保护纳米颗粒不团聚,而且大多数金属-有机框架化合物是微孔材料,这限制了反应底物和产物进入孔道中的活性中心导致活性较低。1我们首次利用多级微介孔金属-有机框架化合物MM-MIL-53(Al)成功地将PtPd合金纳米晶分散在其孔道中。有趣地是,MM-MIL-53(Al)上的路易斯酸碱活性中心与PtPd合金纳米晶组成双功能催化剂,能有效地在无氧条件下协同催化仲醇脱氢转化为酮(Fig.1)。
MOFs in most metal nanoparticles(NPs)/MOFs composite systems serve only as supports to protect NPs from agglomeration.Up to now,most MOFs have still been largely restricted to the microporous regime,which limits the diffusion and mass transfer of substrates and products.We use hierarchically micro-and mesoporous MOFs to immobilize highly dispersed PtPd bimetallic alloy NPs.The obtained composites as bifunctional catalysts based on the combination of MOFs and alloy NPs show synergistic enhanced catalysis of oxidant-free dehydrogenation of alcohols.The mesopores facilitate diffusion and accessibility of substrates and products,while the micropores provide large pore volumes and high surface areas to create more active sites to enhance the catalytic activity.
MOFs in most metal nanoparticles(NPs)/MOFs composite systems serve only as supports to protect NPs from agglomeration.Up to now,most MOFs have still been largely restricted to the microporous regime,which limits the diffusion and mass transfer of substrates and products.We use hierarchically micro-and mesoporous MOFs to immobilize highly dispersed PtPd bimetallic alloy NPs.The obtained composites as bifunctional catalysts based on the combination of MOFs and alloy NPs show synergistic enhanced catalysis of oxidant-free dehydrogenation of alcohols.The mesopores facilitate diffusion and accessibility of substrates and products,while the micropores provide large pore volumes and high surface areas to create more active sites to enhance the catalytic activity.
引文
[1]a)Huang,Y.;Lin,Z.;Cao,R.Chem.Eur.J.2011,17:12706;b)Huang,Y.;Shen,M.;Wang,X.;Shi,P.;Li,H.;Cao,R.J.Catal.2015,330:452.