State Key Laboratory of Physical Chemistry of Solid Surfaces, Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, China.
J Am Chem Soc. 2011 Aug 24;133(33):12930-3. doi: 10.1021/ja2042029. Epub 2011 Aug 2.
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.
具有高指数晶面的四面体铂纳米晶体 (THH Pt NCs) 具有高密度的活性位，因此与具有低指数晶面的铂纳米晶体相比具有更高的催化活性。在本通讯中，我们首次报道了使用 Bi 原子修饰 THH Pt NCs 表面，并证明了 Bi 修饰的 THH Pt NCs 对 HCOOH 电氧化的催化活性与裸 THH Pt NCs 相比有了显著提高。还揭示了，在所研究的所有覆盖度下，Bi 修饰的 THH Pt NCs 的催化活性总是表现出更高的催化活性，约为 Bi 修饰的 Pt 纳米球的两倍。这项研究对于基础研究和应用都具有重要意义。
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