Significantly Enhancing Catalytic Activity of Tetrahexahedral Pt Nanocrystals by Bi Adatom Decoration

被引:131
作者
Chen, Qing-Song [1 ,2 ]
Zhou, Zhi-You [2 ]
Vidal-Iglesias, Francisco J. [1 ]
Solla-Gullon, Jose [1 ]
Feliu, Juan M. [1 ]
Sun, Shi-Gang [2 ]
机构
[1] Univ Alicante, Inst Electrochem, E-03080 Alicante, Spain
[2] Xiamen Univ, Coll Chem & Chem Engn, Dept Chem, State Key Lab Phys Chem Solid Surfaces, Xiamen 361005, Peoples R China
关键词
FORMIC-ACID OXIDATION; IRREVERSIBLY ADSORBED ADATOMS; MODIFIED STEPPED ELECTRODES; SINGLE-CRYSTAL ELECTRODES; HETEROGENEOUS ELECTROCATALYSIS; DISSOCIATIVE ADSORPTION; PLATINUM-ELECTRODES; PT(111) ELECTRODES; POISON FORMATION; SURFACES;
D O I
10.1021/ja2042029
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
Tetrahexahedral Pt nanocrystals (THH Pt NCs) bounded by high-index facets possess a high density of active sites and display therefore a higher catalytic activity in comparison with those enclosed by low-index facets. In the current communication, we report, for the first time, the decoration of THH Pt NC surfaces by using Bi adatoms and have demonstrated that the catalytic activity of the Bi decorated THH Pt NCs toward HCOOH electrooxidation has been drastically enhanced in comparison with bare THH Pt NCs. It has also been revealed that the catalytic activity of Bi decorated THH Pt NCs for all coverages investigated always exhibits a higher catalytic activity that is about double that of Bi decorated Pt nanospheres. The study is of great importance regarding both fundamentals and applications.
引用
收藏
页码:12930 / 12933
页数:4
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