Author:
Schwämmlein Jan N.,Torres Paulette A. Loichet,Gasteiger Hubert A.,El-Sayed Hany A.
Abstract
AbstractElectrochemical deposition is a viable approach to develop novel catalyst structures, such as Pt thin films on conductive support materials. Most studies, reaching out to control electrochemical deposition of Pt to monolayer quantities focus on noble metal substrates (e.g., Au). In contrast, conductive oxides, such as antimony doped tin oxide (ATO), are considered as support material for different applications, e.g., as fuel cell catalysts. Herein, we investigate the deposition process of Pt on Sn, used as a model system for the electrochemical deposition of Pt on non-noble metal oxide supports. Doing so, we shade some light on the differences of a metallic Sn surface and surface oxide species in electrochemical deposition processes. With respect to a borate buffer solution, containing K2PtCl4 as Pt precursor, we report for the first time that surface oxides have the capability to fully inhibit the electrochemical deposition of Pt. Furthermore, direct alloying of the deposited Pt with the Sn support during the electrodeposition process yielded a catalyst with a high activity for the oxidation of CO.
Funder
European Community's Seventh Framework Program for the Fuel Cell and Hydrogen Joint Technology Initiative
Publisher
Springer Science and Business Media LLC
Reference37 articles.
1. Toyota Advanced Technology Communications. Toyota Ushers in the Future with Launch of ‘Mirai’ Fuel Cell Sedan. Available at, http://newsroom.toyota.co.jp/en/detail/4198334/ (2014).
2. Global, P. R. Team. Hyundai Celebrates World’s First Assembly Line Production of Zero-Emissions Fuel Cell Vehicles. Available at, http://globalpr.hyundai.com/prCenter/news/newsView.do?dID=1581 (2013).
3. Honda North America. Southern California Customers Take Delivery of New 2017 Honda Clarity Fuel Cell Sedan. Available at, http://hondanews.com/honda-automobiles/channels/clarity-fuel-cell-press-releases/releases/southern-california-customers-take-delivery-of-new-2017-honda-clarity-fuel-cell-sedan (2016).
4. U.S. DRIVE partnership. Fuel Cell Technical Team Roadmap. Available at, http://energy.gov/sites/prod/files/2014/02/f8/fctt_roadmap_june2013.pdf (2013).
5. Kinoshita, K. Particle Size Effects for Oxygen Reduction on Highly Dispersed Platinum in Acid Electrolytes. J. Electrochem. Soc. 137, 845, https://doi.org/10.1149/1.2086566 (1990).