Single Platinum Atoms Electrocatalysts: Oxygen Reduction and Hydrogen Oxidation Reactions

Journal Article · Tue Aug 08 00:00:00 EDT 2017 · Croatica Chemica Acta

DOI:https://doi.org/10.5562/cca3176· OSTI ID:1377023

Vukmirovic, Miomir B. ^[1]; Teeluck, Krishani M. ^[1]; Liu, Ping ^[1]; Adzic, Radoslav R. ^[1]

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1. Brookhaven National Lab. (BNL), Upton, NY (United States). Chemistry Division

We prepared atomically dispersed catalyst consisting of Pt atoms arranged in a c(2 × 2) array on RuO2(110) substrate. A large interatomic distance of Pt atoms in a c(2 × 2) phase precludes the reactants to interact with more than one Pt atoms. A strong bond of Pt atoms with RuO2 prevents agglomeration of Pt atoms to form 2D-islands or 3D-clusters. The activities of single Pt atom catalyst for the oxygen reduction and hydrogen oxidation reactions were determined and compared with those of bulk Pt. It has lower catalytic activity for the oxygen reduction reaction and similar activity for hydrogen oxidation reaction compared to Pt(111). This was explained by a large calculated up-shift of the dband center of Pt atoms and larger Pt-Pt interatomic distance than that of Pt(111). Our information is of considerable interest for further development of electrocatalysis.

• Research Organization: Brookhaven National Lab. (BNL), Upton, NY (United States)
• Sponsoring Organization: USDOE Office of Science (SC), Basic Energy Sciences (BES)
• Grant/Contract Number: SC00112704
• OSTI ID: 1377023
• Report Number(s): BNL-114179-2017-JA; R&D Project: MA510MAEA; KC0302010
• Journal Information: Croatica Chemica Acta, Vol. 90, Issue 2; ISSN 0011-1643
• Publisher: The Croatian Chemical Society
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
single atom
monolayers
platinum
oxygen reduction reaction
hydrogen oxidation reaction