PdCu二十面体纳米晶的可控合成及电催化性质研究
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- 英文论文题名：Controlled synthesis of PdCu icosahedral nanocrystals and their electrocatalytic properties
- 论文作者：陈梅珊 ; 陈巧丽 ; 匡勤 ; 谢兆雄
- 英文论文作者：Meishan Chen ; Qiaoli Chen ; Qin kuang ; Zhaoxiong Xie ; State Key Laboratory of Physical Chemistry of Solid Surfaces and Department of Chemistry ; College of Chemistry and Chemical Engineering ; Xiamen University
- 年：2016
- 作者机构：厦门大学化学化工学院化学系固体表面物理化学国家重点实验室;
- 论文关键词：Pd-Cu合金 ; 甲酸氧化
- 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-第三十七分会：纳米催化
- 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-第三十七分会 ; 纳米催化
- 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：2
- 文件大小：309k
- 原文格式：D
- 会议级别：全国
摘要
Pd是许多催化剂中的关键组成元素,同时它也是最有希望取代Pt基催化剂的材料,正因如此,近年来Pd基催化剂以其独特的物理化学性质在各大高科技领域收到越来越多的关注。在许多情况下,双金属合金纳米晶体不仅显示相关属性的简单组合,而且在一个给定的性质上与单金属相比也可以表现出极大的增强,这就是所谓的协同作用。非贵重过渡金属3d的掺入,如Cu,不仅可以降低成本,而且还实现了表面d带中心移动。在本文,我们成功合成了尺寸为10nm的二十面体PdCu纳米晶,并且可以通过改变前驱体的用量实现了对合金比例的调控,Cu的含量可以从13%调整到67%。在催化甲酸氧化过程中,我们发现Pd_(43)Cu_(57)表现出了更高催化活性。
Pd is not only a key component of many catalysts,but also the most promising candidate to substitute Pt-based catalysts.Due to its unique physical and chemical properties,Pd-based catalysts have received increasing attentions in recent years.In addition,bimetallic-alloy nanocrystals not only exhibit a simple combination of the properties related to their two parent metals but also can exhibit great enhancement in a given physicochemical property compared with their monometallic counterparts.Typically,the incorporation of a non-noble 3d transition metal,such as Cu,into Pd can not only lower the cost but also achieve a shift of the surfaced-band center.Herein we succeeded in synthesizing icosahedral PdCu alloy nanocrystals of 10 nm in size.By changing the amount of precursors,the Cu content in PdCu alloy nanocrystals can be tuned from 13% to 67%.Our experimental results demonstrated that in the process of catalytic oxidation of formic acid,Pd_(43)Cu_(57) exhibited higher catalytic activity than other PdCu alloy nanocrystals.
Pd is not only a key component of many catalysts,but also the most promising candidate to substitute Pt-based catalysts.Due to its unique physical and chemical properties,Pd-based catalysts have received increasing attentions in recent years.In addition,bimetallic-alloy nanocrystals not only exhibit a simple combination of the properties related to their two parent metals but also can exhibit great enhancement in a given physicochemical property compared with their monometallic counterparts.Typically,the incorporation of a non-noble 3d transition metal,such as Cu,into Pd can not only lower the cost but also achieve a shift of the surfaced-band center.Herein we succeeded in synthesizing icosahedral PdCu alloy nanocrystals of 10 nm in size.By changing the amount of precursors,the Cu content in PdCu alloy nanocrystals can be tuned from 13% to 67%.Our experimental results demonstrated that in the process of catalytic oxidation of formic acid,Pd_(43)Cu_(57) exhibited higher catalytic activity than other PdCu alloy nanocrystals.
引文
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