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Single‐Atom Catalyst of Platinum Supported on Titanium Nitride for Selective Electrochemical Reactions

Single‐Atom Catalyst of Platinum Supported on Titanium Nitride for Selective Electrochemical... As a catalyst, single‐atom platinum may provide an ideal structure for platinum minimization. Herein, a single‐atom catalyst of platinum supported on titanium nitride nanoparticles were successfully prepared with the aid of chlorine ligands. Unlike platinum nanoparticles, the single‐atom active sites predominantly produced hydrogen peroxide in the electrochemical oxygen reduction with the highest mass activity reported so far. The electrocatalytic oxidation of small organic molecules, such as formic acid and methanol, also exhibited unique selectivity on the single‐atom platinum catalyst. A lack of platinum ensemble sites changed the reaction pathway for the oxygen‐reduction reaction toward a two‐electron pathway and formic acid oxidation toward direct dehydrogenation, and also induced no activity for the methanol oxidation. This work demonstrates that single‐atom platinum can be an efficient electrocatalyst with high mass activity and unique selectivity. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Angewandte Chemie International Edition Wiley

Single‐Atom Catalyst of Platinum Supported on Titanium Nitride for Selective Electrochemical Reactions

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References (39)

Publisher
Wiley
Copyright
© 2016 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim
ISSN
1433-7851
eISSN
1521-3773
DOI
10.1002/anie.201509241
pmid
26710326
Publisher site
See Article on Publisher Site

Abstract

As a catalyst, single‐atom platinum may provide an ideal structure for platinum minimization. Herein, a single‐atom catalyst of platinum supported on titanium nitride nanoparticles were successfully prepared with the aid of chlorine ligands. Unlike platinum nanoparticles, the single‐atom active sites predominantly produced hydrogen peroxide in the electrochemical oxygen reduction with the highest mass activity reported so far. The electrocatalytic oxidation of small organic molecules, such as formic acid and methanol, also exhibited unique selectivity on the single‐atom platinum catalyst. A lack of platinum ensemble sites changed the reaction pathway for the oxygen‐reduction reaction toward a two‐electron pathway and formic acid oxidation toward direct dehydrogenation, and also induced no activity for the methanol oxidation. This work demonstrates that single‐atom platinum can be an efficient electrocatalyst with high mass activity and unique selectivity.

Journal

Angewandte Chemie International EditionWiley

Published: Feb 1, 2016

Keywords: ; ; ; ;

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