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Taming interfacial electronic properties of platinum nanoparticles on vacancy-abundant boron nitride nanosheets for enhanced catalysis.
Nature Communications ( IF 14.7 ) Pub Date : 2017-06-09 , DOI: 10.1038/ncomms15291
Wenshuai Zhu 1, 2 , Zili Wu 2 , Guo Shiou Foo 2 , Xiang Gao 3 , Mingxia Zhou 4 , Bin Liu 4 , Gabriel M Veith 3 , Peiwen Wu 1, 2 , Katie L Browning 3 , Ho Nyung Lee 3 , Huaming Li 5 , Sheng Dai 2 , Huiyuan Zhu 2
Affiliation  

Taming interfacial electronic effects on Pt nanoparticles modulated by their concomitants has emerged as an intriguing approach to optimize Pt catalytic performance. Here, we report Pt nanoparticles assembled on vacancy-abundant hexagonal boron nitride nanosheets and their use as a model catalyst to embrace an interfacial electronic effect on Pt induced by the nanosheets with N-vacancies and B-vacancies for superior CO oxidation catalysis. Experimental results indicate that strong interaction exists between Pt and the vacancies. Bader charge analysis shows that with Pt on B-vacancies, the nanosheets serve as a Lewis acid to accept electrons from Pt, and on the contrary, when Pt sits on N-vacancies, the nanosheets act as a Lewis base for donating electrons to Pt. The overall-electronic effect demonstrates an electron-rich feature of Pt after assembling on hexagonal boron nitride nanosheets. Such an interfacial electronic effect makes Pt favour the adsorption of O2, alleviating CO poisoning and promoting the catalysis.

中文翻译:


驯服空位丰富的氮化硼纳米片上铂纳米颗粒的界面电子特性以增强催化作用。



抑制由伴随物调节的 Pt 纳米颗粒的界面电子效应已成为优化 Pt 催化性能的一种有趣方法。在这里,我们报告了在空位丰富的六方氮化硼纳米片上组装的 Pt 纳米颗粒,及其作为模型催化剂的用途,以包含具有 N 空位和 B 空位的纳米片诱导的 Pt 界面电子效应,从而实现优异的 CO 氧化催化。实验结果表明Pt与空位之间存在强烈的相互作用。 Bader 电荷分析表明,当 Pt 在 B 空位上时,纳米片充当路易斯酸来接受来自 Pt 的电子,相反,当 Pt 位于 N 空位上时,纳米片充当路易斯碱,向 Pt 提供电子。全电子效应表明 Pt 在六方氮化硼纳米片上组装后具有富电子特征。这种界面电子效应使Pt有利于O 2的吸附,减轻CO中毒并促进催化。
更新日期:2017-06-12
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