酒石酸辅助制备分层的钯锡纳米枝晶及其对乙醇电催化氧化活性研究
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- 英文论文题名：Tartaric Acid Assisted Electrodeposition of Hierarchical Pd-Sn Nanodendrites and Its Electrocatalytic Activity toward Ethanol Oxidation
- 论文作者：张艳宇 ; 赵鸿莹 ; 金碧瑶 ; 赵莲花
- 英文论文作者：Yanyu Zhang ; Hongying Zhao ; Biyao Jin ; Lianhua Zhao ; Department of Chemistry ; College of Science ; Yanbian University
- 年：2016
- 作者机构：延边大学理学院化学系;
- 论文关键词：乙醇电催化氧化 ; 钯锡 ; 树枝状结构 ; 酒石酸
- 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-第四十二分会：能源纳米材料物理化学
- 语种：中文
- 分类号：O621.251;TB383.1
- 学会代码：ZGHY
- 会议名称：中国化学会第30届学术年会-第四十二分会 ; 能源纳米材料物理化学
- 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：192k
- 原文格式：D
- 会议级别：全国
摘要
有研究表明,在钯催化剂的基础上引入锡形成钯锡合金能提高对乙醇的催化活性和抗中毒性[1]。通过调控双金属催化剂的形貌能改善其催化性能。枝晶形貌的催化剂具有大的比表面积能增加催化活性位点[2]。本研究使用酒石酸为络合剂辅助制备分层的钯锡树枝状催化剂,探究酒石酸含量的不同对钯锡合金树枝状形貌及对乙醇的电催化氧化活性的影响。沉积电解液中不含酒石酸时,如Fig.1(a)所示,形成了树枝状结构,但相邻分枝之间彼此粘连。当加入适量酒石酸,如Fig.1(b)所示,形成了清晰、分层的树枝状结构。相邻分枝彼此之间完全分开,这利于提高催化剂表面积。Fig.2为钯催化剂、分层的和不分层的钯锡树枝状催化剂(Pd-Sn-1和Pd-Sn-2)在0.2 mol/L KOH+0.5 mol/L C_2H_5OH中的循环伏安图。对乙醇催化活性由高到低顺序为Pd-Sn-1>Pd-Sn-2>Pd。分层的钯锡树枝状催化剂具有更大的比表面积、更多催化活性位点,这可能是其催化活性更好的原因之一。
As reported, Pd-Sn binary electrocatalysts is more active than Pd for ethanol oxidation reaction [1]. Binary electrocatalysts activity is related to their morphology [2]. Pd-Sn nanodendrites were formed in the absence of tartaric acid. However, nanodendrites were not hierarchical. When the tartaric acid was added, clear trunk and secondary branch structure was observed and completely separated from each other. And We find that the electrocatalysts activity for ethanol oxidation is Pd-Sn-1> Pd-Sn-2> Pd. It is maybe because the hierarchical nanodendrites have more catalytic activity sites and is favorable for ethanol oxidation.
As reported, Pd-Sn binary electrocatalysts is more active than Pd for ethanol oxidation reaction [1]. Binary electrocatalysts activity is related to their morphology [2]. Pd-Sn nanodendrites were formed in the absence of tartaric acid. However, nanodendrites were not hierarchical. When the tartaric acid was added, clear trunk and secondary branch structure was observed and completely separated from each other. And We find that the electrocatalysts activity for ethanol oxidation is Pd-Sn-1> Pd-Sn-2> Pd. It is maybe because the hierarchical nanodendrites have more catalytic activity sites and is favorable for ethanol oxidation.
引文
[1]Du,W.;Mackenzie,K.E.;Milano,D.F.;Deskins,N.A.Catal.2012 2(2):287.
[2]Ding,L.;Wang,A.;Yan,Ou.Sci.Rep.2013,3(2):2045.
[2]Ding,L.;Wang,A.;Yan,Ou.Sci.Rep.2013,3(2):2045.