TiO_2负载的纳米Au-Pd双金属催化剂的XPS和LEIS的研究
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- 英文论文题名：The Study of TiO_2 supported Au Pd nano-particles by XPS and LEIS
- 论文作者：李洋洋 ; 马冬冬 ; 郑燕萍 ; 陈明树 ; 万惠霖
- 英文论文作者：Yangyang Li ; Dongdong Ma ; Yanping Zheng ; Mingshu Chen ; Huilin Wan ; State Key Laboratory of Physical Chemistry of Solid Surfaces ; National Engineering Laboratory for Green Chemical Productions of Alcohols-Ethers-Esters ; Department of Chemistry ; College of Chemistry and Chemical Engineering ; Xiamen University
- 年：2016
- 作者机构：固体表面物理化学国家重点实验室醇醚酯化工清洁生产国家工程实验室厦门大学化学化工学院化学系厦门大学;
- 论文关键词：AuPd合金 ; TiO_2 ; X-光电子能谱 ; 低能离子散射谱 ; 表面组成
- 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：207k
- 原文格式：D
- 会议级别：全国
摘要
相对于单一的贵金属催化剂,贵金属合金催化剂由于电子效应和几何效应等往往具有更好的催化性能。本报告制备了TiO_2负载的高分散Au Pd合金催化剂,通过在不同温度和不同气氛处理,利用X-光电子能谱(XPS)和低能离子散射谱(LEISS)等检测手段,建立催化剂表面的组成、价态与合金纳米粒子组成以及所处环境的关系[1]。空气气氛升温,相对于单负载的Pd/TiO_2,合金有一定的抗氧化性能,并且Pd在表面有一定的富集。氢的处理会导致Au在表面的富集,真空处理导致合金粒子在表面的分散变差。
Noble metal alloy catalyst always have better catalytic performance because of the special electronic effect and geometric effect.In this presentation,the high dispersed Au Pd/TiO_2 catalysts were prepared and treated under different reaction conditions and at various temperatures.It was found that the alloy has better anti-oxidation property,and Pd is enriched on the surface in air treatments.In contrast,Au is enriched on the surface under H2 treatments,and the alloy metal particles sinters fast under vacuum.
Noble metal alloy catalyst always have better catalytic performance because of the special electronic effect and geometric effect.In this presentation,the high dispersed Au Pd/TiO_2 catalysts were prepared and treated under different reaction conditions and at various temperatures.It was found that the alloy has better anti-oxidation property,and Pd is enriched on the surface in air treatments.In contrast,Au is enriched on the surface under H2 treatments,and the alloy metal particles sinters fast under vacuum.
引文
[1]C.-W.Yi,K.Luo,T.Wei,D.W.Goodman.J.Phys.Chem.B,2005,109(39):18535.