title: Oxygen-Tolerant Electrodes with Platinum-Loaded Covalent Triazine Frameworks for the Hydrogen Oxidation Reaction.
abstract: Reducing the use of platinum (Pt) on polymer electrolyte fuel cell anodes is critical for the widespread dissemination of these energy conversion systems. Although Pt usage can be minimized by the even dispersion of isolated Pt atoms, no atomically dispersed Pt catalysts that promote hydrogen oxidation at a rate required for practical fuel cells have been reported to date. Covalent triazine frameworks with atomically dispersed Pt atoms (0.29 wt %) are described and it is demonstrated that the material has a high electrocatalytic hydrogen oxidation activity without an overpotential. Importantly, when the loading amount was increased to 2.8 wt %, the electrocatalytic hydrogen oxidation activity of the resulting electrode was comparable to that of commercial carbon supported 20 wt % Pt catalysts, and the catalytic activity for oxygen reduction was markedly reduced. Thus, Pt-modified covalent triazine frameworks selectively catalyze hydrogen oxidation, even in the presence of dissolved oxygen, which is critical for limiting cathode degradation during the start-stop cycles of fuel cells.
authors.affiliation: Department of Advanced Interdisciplinary Studies, The University of Tokyo, 4-6-1 Komaba, Meguro-ku, Tokyo, 153-8904, Japan.|Advanced Technologies Development Center, Eco Solutions Company, Panasonic Corporation, 1048 Kadoma, Kadoma, Osaka, 571-8686, Japan.
authors.forename: Ryo
authors.initials: R
authors.lastname: Kamai
authors.affiliation: Research Center for Solar Energy Chemistry, Osaka University, 1-3 Machikaneyama, Toyonaka, Osaka, 560-8531, Japan.|Japan Science and Technology Agency (JST) PRESTO, 4-1-8 Honcho, Kawaguchi, Saitama, 332-0012, Japan.
authors.forename: Kazuhide
authors.initials: K
authors.lastname: Kamiya
authors.affiliation: National Institute for Materials Science, 1-2-1 Sengen, Tsukuba, Ibaraki, 305-0047, Japan. HASHIMOTO.Kazuhito@nims.go.jp.
authors.forename: Kazuhito
authors.initials: K
authors.lastname: Hashimoto
authors.affiliation: Research Center for Solar Energy Chemistry, Osaka University, 1-3 Machikaneyama, Toyonaka, Osaka, 560-8531, Japan. nakanishi@chem.es.osaka-u.ac.jp.
authors.forename: Shuji
authors.initials: S
authors.lastname: Nakanishi
keywords: covalent triazine frameworks; electrocatalysis; fuel cells; platinum