Rapid synthesis of highly active Pt/C catalysts with various metal loadings from single batch platinum colloid  

作　　者：Yuxin Li Xiang Zhu Yawen Chen Shiqiao Zhang Jia Li Jianguo Liu 

机构地区：[1]Jiangsu Key Laboratory for Nano Technology,National Laboratory of Solid State Microstructures,College of Engineering and Applied Sciences,and Collaborative Innovation Center of Advanced Microstructures,Nanjing University,Nanjing 210093,Jiangsu,China [2]Kunshan Innovation Institute of Nanjing University,Kunshan Sunlaite New Energy Co.,Ltd.,Suzhou 215347,Jiangsu,China

出　　处：《Journal of Energy Chemistry》2020年第8期138-145,I0005,共9页能源化学（英文版）

基　　金：financial supports from National Key R&D Plan of China (2017YFB0102803);the National Natural Science Foundation of China (21676135);Scientific Instrument Develop Major Project of National Natural Science Foundation of China (51627810);Joint Funds of the National Natural Science Foundation and Liaoning of China (U1508202);Key R&D programs in Jiangsu (BE2018051);“333” project of Jiangsu Province (BRA2018007);Natural Science Foundation of Jiangsu Province (BK20161273, BK20181199);the Graduate Innovation Foundation of Nanjing university (2017ZDL05);support of PAPD of Jiangsu Higher Education Institutions;“Six Talent Peaks Program” of Jiangsu Province;Fundamental Research Funds for the Central Universities, China。

摘　　要：A series of Pt/C catalysts for proton exchange membrane fuel cells(PEMFCs) with various metal loadings is synthesized by a microwave-assisted polyol process via mixing an extremely stable platinum colloid(> 3 months’ shelf life) from single batch preparation with activated carbon ethylene glycol suspension.21 wt%, 42 wt% and 61 wt% Pt loadings are employed to showcase the advantages of the improved polyol process. The ultraviolet(UV)–visible spectra and ζ-potential measurements are conducted to monitor the wet chemistry process during catalyst preparation. The powder X-ray diffraction(XRD), transmission electron microscopy(TEM) and thermogravimetric analysis(TGA) characterizations are carried out on catalysts. The catalyst activities are investigated using electrochemical and single cell tests. The stability of Pt nanoparticle colloid is explored by ORR, cyclic voltammetry(CV) and ζ-potential measurements. The TEM results show the Pt particle sizes of the colloid, and the sizes of the 21 wt%, 42 wt% and 61 wt%Pt/C samples are 2.1–3.9 nm. Because of the high Pt dispersion, the Pt/C catalysts exhibit superior electroactivity toward ORR. In addition, four 61 wt% Pt/C catalysts made from the Pt colloid with 0–3 months’ shelf life show almost the same performance, which exhibits superior stability of the Pt colloid system without surfactant protection.

关 键 词：PEMFC Pt/C catalyst Microwave irradiation Modified polyol process Platinum nanocolloid Oxygen reduction reaction 

分 类 号：TM911.4[电气工程—电力电子与电力传动]