Citation: Rongrong Zeng, Kun Wang, Wei Shao, Junhang Lai, Shuqin Song, Yi Wang. Investigation on the coordination mechanism of Pt-containing species and qualification of the alkaline content during Pt/C preparation via a solvothermal polyol method[J]. Chinese Journal of Catalysis, ;2020, 41(5): 820-829. doi: S1872-2067(19)63456-X shu

Investigation on the coordination mechanism of Pt-containing species and qualification of the alkaline content during Pt/C preparation via a solvothermal polyol method

Rongrong Zeng ^a, ,
Kun Wang ^a ,
Wei Shao ^b ,
Junhang Lai ^a ,
Shuqin Song ^a ,
Yi Wang ^a

a The Key Laboratory of Low-carbon Chemistry & Energy Conservation of Guangdong Province, School of Materials Science and Engineering, School of Chemical Engineering and Technology, School of Chemistry, Sun Yat-sen University, Guangzhou 510275, Guangdong, China;
b Department of Chemical Engineering, University of Waterloo, 200 University Avenue West, Waterloo, ON N2L 3G1, Canada

Received Date: 20 November 2019
Revised Date: 18 December 2019

Fund Project: The work was supported by the National Natural Science Foundation of China (21576300, 21576299, 21978331, 21975292, 21905311), the National Key Research and Development Program of China (2016YFB0101200), the Guangzhou Science and Technology Project (201707010079), the Fundamental Research Funds for Central Universities (17lgzd14, 19lgpy136, and 19lgpy116), and the Tip-top Scientific and Technical Innovative Youth Talents of Guangdong special support program (2016TQ03N322) and the China Postdoctoral Science Foundation (2019M653142).

A solvothermal assisted ethylene glycol reduction method is a common technology for Pt/C catalysts preparation. Here, the coordination mechanism of the Pt-containing species is deeply studied by innovatively adopting the ultraviolet-visible spectroscopy technology and H⁺ concentration detector. Moreover, the amount of NaOH that effectively coordinates Pt⁴⁺ has been tentatively qualified and the heating parameters during the preparation process of Pt/C have also been optimized. As investigated, the optimized 20-(1/22)-140-2 Pt/C (20 wt%Pt; m(Pt):m(NaOH)=1/22; heating temperature:140℃, heating time:2 h) exhibits higher electrocatalytic activity towards oxygen reduction reaction (ORR) than the commercial 20 wt% Pt/C (E-TEK) in acidic media. This work provides a theoretical reserve and technical accumulation for industrialized mass production of highly efficient Pt/C catalysts for ORR in proton exchange membrane fuel cells.
- Pt/C,
- Oxygen reduction reaction,
- Solvothermal assisted ethylene glycol reduction method,
- Electrocatalytic activity
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