Single-atom catalyst of platinum supported on titanium nitride for selective electrochemical reactions

Sungeun Yang, Jiwhan Kim, Young Joo Tak, Aloysius Soon, Hyunjoo Lee

Research output: Contribution to journalArticle

290 Citations (Scopus)

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.

Original languageEnglish
Pages (from-to)2058-2062
Number of pages5
JournalAngewandte Chemie - International Edition
Volume55
Issue number6
DOIs
Publication statusPublished - 2016 Feb 5

All Science Journal Classification (ASJC) codes

  • Catalysis
  • Chemistry(all)

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