Atomically Thin Film Platinum Supported Sub-Stoichiometric Titania: A Tunable Electrocatalyst for Fuel Cell Reactions

摘要

Designing efficient catalyst for fuel cell devices has gained an increasing amount of attention over the last decade for chemical to electrical energy conversion. The widespread commercialization of fuel cells, such as proton exchange membrane fuel cells, are hindered by the sluggish kinetics of the cathodic oxygen reduction reaction, the costly platinum catalyst employed within the cell, along with long-term catalyst degradation. One approach aimed at simultaneously addressing these drawbacks is to synthesize atomically thin film platinum on a robust support. While many catalysts are being investigated for fuel cell reactions, Pt based catalysts are in high demand due to stability, high activity, and low overpotential. We demonstrate an unprecedented electrochemical deposition of Pt on graphene/sub-stoichiometric titania supports (Ti_2O_3 and Ti_3O_5).