文献类型：期刊文献

英文题名：Platinum assisted by carbon quantum dots for methanol electro-oxidation

作者：Pan, Dan[1];Li, Xingwei[1];Zhang, Aofeng[1]

机构：[1]East China Univ Sci & Technol, Sch Mat Sci & Engn, Shanghai Key Lab Adv Polymer Mat, Key Lab Ultrafine Mat,Minist Educ, Shanghai 200237, Peoples R China

年份：2018

卷号：427

起止页码：715

外文期刊名：APPLIED SURFACE SCIENCE

收录：;EI(收录号：20173804170973);WOS:【SCI-EXPANDED(收录号:WOS:000415219100090)】；

基金：The authors are grateful for the financial support from the financial support by the National Natural Science Foundation of China (51673064), and Shanghai Municipality Research Project (15520720500).

语种：英文

外文关键词：Carbon dots; Platinum; Synergy; Water activation; Methanol oxidation

摘要：Various types of fuel cells as clean and portable power sources show a great attraction, especially direct methanol fuel cell (DMFC) having high energy density, low operating temperature and convenient fuel storage. However, the preparation of low-cost Pt-based catalysts with satisfactory catalytic performance still faces many challenges for its commercialization on large scale. Here, Pt catalysts assisted by carbon quantum dots (CQDs) are reported. The synergistic effect of carbon quantum dots and Pt metals is similar to a bi-component catalyst, such as PtRu. First, carbon quantum dots derived from Vulcan XC-72 carbon black are synthesized by mixed acid etching. Then, carbon black (Vulcan XC-72) is soaked in carbon quantum dots solution for several days to obtain carbon black modified by carbon quantum dots (XC-72-CQDs). Finally, Pt catalysts are supported on XC-72-CQDs (Pt/XC-72-CQDs) through a simple chemical reduction method. For methanol electro-oxidation reaction, the catalytic performance of Pt/XC-72-CQDs is compared with commercial PtRu/C (30% Pt + 15% Ru). Results show that a typical product (Pt/XC-72-CQDs5) exhibits a better catalytic activity than PtRu/C. In cyclic voltammetry test, the specific activity of Pt/XC-72-CQDs5 is 1.06 mA cm(-2) Pt and 477.6 mA mg(-1) Pt, while that of PtRu/C is 0.77 mA cm(-2) Pt and 280.6 mA mg(-1) Pt. (C) 2017 Elsevier B.V. All rights reserved.