Synthesis of well-dispersed Pt-Pd nanoparticles stabilized by silsesquioxanes with enhanced catalytic activity for formic acid electrooxidation
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- 作者：Kun Qian ; Furui Hao ; Shuhai Wei ; Yihong Wang…
- 关键词：Nanoparticles ; Pt ; Pd ; Hydrothermal method ; Octa ; maleamic acid silsesquioxanes ; CO poisoning ; Formic acid oxidation
- 刊名：Journal of Solid State Electrochemistry
- 出版年：2017
- 出版时间：January 2017
- 年：2017
- 卷：21
- 期：1
- 页码：297-304
- 全文大小：
- 刊物类别：Chemistry and Materials Science
- 刊物主题：Physical Chemistry; Electrochemistry; Energy Storage; Characterization and Evaluation of Materials; Analytical Chemistry; Condensed Matter Physics;
- 出版者：Springer Berlin Heidelberg
- ISSN：1433-0768
- 卷排序：21
文摘
The preparation of well-dispersed nanoparticles (NPs) has been one of the challenges in the development of nanoscale processing. Here, we firstly prepared well-dispersed Pt-Pd NPs (average particle diameter 6.5 nm) by using octa-maleamic acid silsesquioxanes as the stabilizing agent with hydrothermal method and determined the best OM-POSS/metal precursors molar ratio (1:2). These well-dispersed Pt-Pd NPs exhibited enhanced electrocatalytic performance, stability and tolerance to CO poisoning in formic acid oxidation. Their current density of the first oxidation peak in the CV curve recorded in 0.5 M H2SO4 + 0.5 M HCOOH is 4.3 and 8.6 times higher than those of Pt NPs (0.24 A mg−1) and commercial Pt/C (0.08 A mg−1) catalysts, as well as the ratio of the two oxidation peaks 4.8 and 10 times higher, respectively.