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Single‐Atom Catalyst of Platinum Supported on Titanium Nitride for Selective Electrochemical Reactions
Author(s) -
Yang Sungeun,
Kim Jiwhan,
Tak Young Joo,
Soon Aloysius,
Lee Hyunjoo
Publication year - 2016
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.201509241
Subject(s) - platinum , catalysis , formic acid , electrocatalyst , chemistry , inorganic chemistry , dehydrogenation , methanol , platinum nanoparticles , selectivity , electrochemistry , photochemistry , organic chemistry , electrode
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.