There have been extensive efforts to develop competitive electrocatalysts using carbon black (CB) supports for high-performance proton-exchange membrane fuel cells with less usage of Pt. Herein, we propose a very promising electrocatalyst architecture based on the three-dimensional Pt/indium tin oxide (ITO)/CB support structure which was enabled by a nonconventional deposition process ensuring very uniform impregnation of Pt and ITO nanoparticles into the CB network. The unusual scales of the Pt (∼1.9 nm) and ITO (∼5.6 nm) nanoparticles were directly related to unexpectedly better performance of the electrocatalytic activities. As a highlight, the electrochemical surface area of the electrocatalyst was maintained very well after the 3000 cycle-accelerated durability evaluation by demonstrating an excellent retention of ∼74.9%. Particularly, the CO tolerance exhibited a low value of ∼0.68 V as the absorption current peak, compared to ∼0.79 V for a commercial Pt/CB catalyst containing twice more Pt.
Bibliographical noteFunding Information:
This work was supported by the Fundamental R&D Program for the Core Technology of Materials (grant #10037289) funded by the Ministry of Science and ICT. This work was also financially supported by grants from the National Research Foundation of Korea (NRF-2016M3A7B4910151); the Industrial Strategic Technology Development Program of the Ministry of Trade, Industry, & Energy (#10079981); and the Creative Materials Discovery Program of the Ministry of Science and ICT (2018M3D1A1058536).
© 2019 American Chemical Society.
All Science Journal Classification (ASJC) codes
- Materials Science(all)