合成不同壁厚的Pd@PtNi凹面立方体核壳结构催化剂及其在氧还原反应中的应用
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- 英文论文题名：Structural Evolution of Concave Pd@Pt Ni Nanocubes with Tunable Ultra-Thin Shells for Oxygen Reduction Reactions
- 论文作者：于盛楠 ; 张雷 ; 赵志坚 ; 王骁 ; 李盎 ; 巩金龙
- 英文论文作者：Shengnan Yu ; Lei Zhang ; Zhijian Zhao ; Xiao Wang ; Ang Li ; Jinlong Gong ; School of Chemical Engineering and Technology ; Tianjin University ; Collaborative Innovation Center of Chemical Science and Engineering
- 年：2016
- 作者机构：天津大学化工学院天津化学化工协同创新中心;
- 论文关键词：核壳结构 ; 凹陷结构 ; 氧还原反应
- 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-第二十九分会：电化学材料
- 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-第二十九分会 ; 电化学材料
- 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：186k
- 原文格式：D
- 会议级别：全国
摘要
Pt基催化剂是公认的低温燃料电池体系中活性最高的催化剂,如何最大程度的减少Pt的使用量并且保持催化剂的活性是当前的研究热点。我们将Pt Ni原子通过共还原的方式生长到Pd内核上,并且通过调控生长条件合成具有凹陷结构的立方体催化剂。将催化剂的合成条件与其形貌相对应,我们推断出催化剂的凹陷程度可以通过调节原子的沉积速率和扩散速率之差来实现。合成催化剂的氧还原质量活性是商品化Pt/C催化剂活性的4倍,且稳定性有了很大的提高。
For Pt-based catalysts, how to reduce the consumption of Pt while retaining the high catalytic activity is an urgent issue. We describes a novel, facile synthetic strategy to prepare core-shell Pd@PtN i catalysts with tunable, ultra-thin bimetallic PtN i shells to address this issue. We indicate that the core-shell nanocrystals with concave surfaces were caused by the different rates between the atom deposition and diffusion process during the overgrowth reaction. The as-prepared concave Pd@PtN i nanocubes exhibited excellent catalytic activities than the commercial Pt/C catalysts.
For Pt-based catalysts, how to reduce the consumption of Pt while retaining the high catalytic activity is an urgent issue. We describes a novel, facile synthetic strategy to prepare core-shell Pd@PtN i catalysts with tunable, ultra-thin bimetallic PtN i shells to address this issue. We indicate that the core-shell nanocrystals with concave surfaces were caused by the different rates between the atom deposition and diffusion process during the overgrowth reaction. The as-prepared concave Pd@PtN i nanocubes exhibited excellent catalytic activities than the commercial Pt/C catalysts.
引文
[1]Zhang,L.;Roling,L.T.;Wang,X.;Vara,M.;Chi,M.;Liu,J.;Choi,S.I.;Park,J.;Herron,J.A.;Xie,Z.;Mavrikakis,M.;Xia,Y.Science 2015,349:412.
[2]Xie,S.;Choi,S.I.;Lu,N.;Roling,L.T.;Herron,J.A.;Zhang,L.;Park,J.;Wang,J.;Kim,M.J.;Xie,Z.;Mavrikakis,M.;Xia,Y.Nano Lett.2014,14:3570.
[2]Xie,S.;Choi,S.I.;Lu,N.;Roling,L.T.;Herron,J.A.;Zhang,L.;Park,J.;Wang,J.;Kim,M.J.;Xie,Z.;Mavrikakis,M.;Xia,Y.Nano Lett.2014,14:3570.