期刊文献+

单原子层Pd壳的Pt_3Ni纳米立方体的甲酸氧化性能(英文) 被引量:1

Formic Acid Oxidation by Pd Monolayers on Pt_3Ni Nanocubes
下载PDF
导出
摘要 通过一种结合了CO辅助合成Pt_3Ni纳米立方粒子和单原子层Cu壳欠电位沉积再置换为Pd的方法,成功制备出了具有单原子层Pd壳和Pt_3Ni纳米立方粒子核结构的Pt_3Ni@Pd/C催化剂。电感耦合等离子体元素分析、X射线衍射和透射电子显微镜法被用于研究表征此种Pt_3Ni@Pd/C催化剂,结果显示大部分Pt_3Ni纳米粒子的表面都由{100}族的晶面所构成。而且在这些{100}族的晶面上,单原子层Pd壳通过电沉积的外延生长,也获得了{100}族的晶面。本文进一步对Pt_3Ni@Pd/C作为甲酸氧化电催化剂的性能进行了研究,并与商业Pd/C和原Pt_3Ni/C催化剂进行了比较。结果显示,由于Pt_3Ni@Pd/C的单原子层Pd壳的结构和所暴露出的Pd{100}族的晶面,Pt_3Ni@Pd/C催化剂具有优异的甲酸氧化电催化性能。与原Pt_3Ni/C催化剂相比较,Pt_3Ni@Pd/C催化剂的贵金属质量比活性提高到了7.5倍。此外,与商业Pd/C催化剂相比,Pt_3Ni@Pd/C催化剂的比表面活性和Pd质量比活性也分别提高到了2.5和8.3倍。 We designed and synthesized carbon-supported cubic Pt3Ni nanoparticles (NPs) with Pd monolayer shells (Pt3Ni@Pd/C) by a two-step method: generally, CO-assisted preparation of cubic Pt3Ni NPs, Pd monolayer deposition through underpotential deposition of a Cu monolayer, and displacement of Cu with Pd. The as-synthesized Pt3Ni@Pd/C catalyst was characterized with inductively coupled plasma elemental analysis, X-ray diffraction, and transmission electron microscopy. Most Pt3Ni NPs had a cubic nanostructure enclosed by {100} facets, on which the Pd monolayer shells were deposited epitaxially via electrodeposition, by which the Pd monolayers gained the crystallographic orientation of the {100} facets. We then used Pt3Ni@Pd/C as an electrocatalyst for formic acid oxidation (FAO), comparing it with commercial Pd/C and the pristine Pt3Ni/C catalysts. The Pt3Ni@Pd/C exhibited superior electrocatalytic performance because of its monolayer structure and exposed Pal{100} facets. The noble-metal mass activity of the Pt3Ni/C with the deposited Pd monolayer shell was 7.5 times greater than that of the Pt3Ni/C catalyst alone. Moreover, the area-specific and Pd mass activities of Pt3Ni@Pd/C were 2.5 and 8.3 times greater than those of the commercial Pd/C catalyst, respectively.
出处 《物理化学学报》 SCIE CAS CSCD 北大核心 2016年第1期337-342,共6页 Acta Physico-Chimica Sinica
基金 supported by the National Natural Science Foundation of China(21373135) Science Foundation of Ministry of Education of China(413064) and Program of Introducing Talents of Discipline to Universities,China("111 Project")(B13018)~~
关键词 电催化剂 甲酸氧化 单原子层Pd壳 立方体结构 核壳结构 Electrocatalyst Formic acid oxidation Palladium monolayer Cubic structure Core-shell structure
  • 相关文献

参考文献26

  • 1Niu, Z.; Peng, Q.; Gong, M.; Rong, H.; Li, Y. Angew. Chem. 2011, 123, 6439. doi: 10.1002/ange.201100512.
  • 2Mazumder, V.; Chi, M.; Mankin, M. N.; Liu, Y.; Metin, O.; Sun, D.; More, K. L.; Sun, S. Nano Lett. 2012, 12, 1102. doi: 10.1021/nl2045588.
  • 3Wang, R.; Liao, S.; Ji, S. J. Power Sources 2008, 180, 205. doi: 10.1016/j.jpowsour.2008.02.027.
  • 4Rice, C.; Ha, S.; Masel, R. I.; Waszczuk, P.; Wieckowski, A.; Barnard, T. J. Power Sources 2002, 111, 83. doi: 10.1016/S0378-7753(02)00271-9.
  • 5Chen, M.; Wang, Z. B.; Zhou, K.; Chu, Y. Y. Fuel Cells 2010, 10, 1171. doi: 10.1002/fuce.v10.6.
  • 6Wang, S.; Kristian, N.; Jiang, S.; Wang, X. Electrochem. Commun. 2008, 10, 961. doi: 10.1016/j.elecom.2008.04.018.
  • 7Yang, J.; Tian, C.; Wang, L.; Fu, H. J. Mater. Chem. 2011, 21, 3384. doi: 10.1039/c0jm03361h.
  • 8Babu, P. K.; Kim, H. S.; Chung, J. H.; Oldfield, E.; Wieckowski, A. J. Phys. Chem. B 2004, 108, 20228. doi: 10.1021/jp0403893.
  • 9Larsen, R.; Ha, S.; Zakzeski, J.; Masel, R. I. J. Power Sources 2006, 157, 78. doi: 10.1016/j.jpowsour.2005.07.066.
  • 10Li, H.; Sun, G.; Jiang, Q.; Zhu, M.; Sun, S.; Xin, Q. Electrochem. Commun. 2007, 9, 1410. doi: 10.1016/j.elecom.2007.01.032.

同被引文献3

引证文献1

二级引证文献5

相关作者

内容加载中请稍等...

相关机构

内容加载中请稍等...

相关主题

内容加载中请稍等...

浏览历史

内容加载中请稍等...
;
使用帮助 返回顶部