Impact of Nafion Loading and Anion Adsorption on the Synthesis of Pt Monolayer Core-shell Catalysts

Authors

Lijun Yang, Ballard Power Systems, 9000 Glenlyon Parkway, Burnaby, BC, V5J 5J8 Canada;Department of Chemical and Biological Engineering, University of British Columbia, 2360 East Mall, Vancouver, British Columbia, V6T 1Z3, Canada;
Dustin Banham, Ballard Power Systems, 9000 Glenlyon Parkway, Burnaby, BC, V5J 5J8 Canada;
Elod Gyenge, Department of Chemical and Biological Engineering, University of British Columbia, 2360 East Mall, Vancouver, British Columbia, V6T 1Z3, Canada;
Siyu Ye, Ballard Power Systems, 9000 Glenlyon Parkway, Burnaby, BC, V5J 5J8 Canada;Follow

Corresponding Author

Siyu Ye(siyu.ye@ballard.com)

Abstract

Carbon supported palladium (Pd) nanoparticles were used as a model core material for the synthesis of platinum (Pt) monolayer core-shell catalysts using rotating disk electrode method and a copper (Cu) under potential deposition technique. The impact of Nafion on the synthesis process was revealed by electrochemical testing with various Nafion contents. The existence of Nafion influenced the Cu under potential deposition, galvanic replacement and eventually the oxygen reduction reaction activity of the core-shell catalyst. However, as long as the Nafion content was less than 5 wt% in the test film, adding Nafion could help to bind catalyst onto the surface of electrode while maintaining promising catalytic activity. Unique anion adsorption/desorption peaks were observed on the surface of Pd in H₂SO₄ solution, which turned out to be a useful indicator to evaluate the impact of Nafion on the synthesis of the core-shell catalysts.

Graphical Abstract

Keywords

core-shell catalyst, oxygen reduction reaction, copper under potential deposition, Nafion content, anions adsorption

DOI Link

https://doi.org/10.13208/j.electrochem.161243

Publication Date

2017-04-28

Online Available Date

2017-02-23

Revised Date

2017-02-23

Received Date

2016-12-26

Recommended Citation

Lijun Yang, Dustin Banham, Elod Gyenge, Siyu Ye. Impact of Nafion Loading and Anion Adsorption on the Synthesis of Pt Monolayer Core-shell Catalysts[J]. Journal of Electrochemistry, 2017 , 23(2): 170-179.
DOI: 10.13208/j.electrochem.161243
Available at: https://jelectrochem.xmu.edu.cn/journal/vol23/iss2/7