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Title: Transition‐Metal Nitride Core@Noble‐Metal Shell Nanoparticles as Highly CO Tolerant Catalysts

Journal Article · · Angewandte Chemie
ORCiD logo [1];  [1];  [2];  [3];  [1];  [2]; ORCiD logo [1]
  1. Department of Chemical Engineering Massachusetts Institute of Technology Cambridge MA 02139 USA
  2. Department of Chemical and Biological Engineering University of Wisconsin-Madison Madison WI 53706 USA
  3. Department of Chemical Engineering Massachusetts Institute of Technology Cambridge MA 02139 USA, Institute of Chemistry University of Campinas Campinas SP 13083-970 Brazil

Abstract Core–shell architectures offer an effective way to tune and enhance the properties of noble‐metal catalysts. Herein, we demonstrate the synthesis of Pt shell on titanium tungsten nitride core nanoparticles (Pt/TiWN) by high temperature ammonia nitridation of a parent core–shell carbide material (Pt/TiWC). X‐ray photoelectron spectroscopy revealed significant core‐level shifts for Pt shells supported on TiWN cores, corresponding to increased stabilization of the Pt valence d‐states. The modulation of the electronic structure of the Pt shell by the nitride core translated into enhanced CO tolerance during hydrogen electrooxidation in the presence of CO. The ability to control shell coverage and vary the heterometallic composition of the shell and nitride core opens up attractive opportunities to synthesize a broad range of new materials with tunable catalytic properties.

Sponsoring Organization:
USDOE
OSTI ID:
1401549
Journal Information:
Angewandte Chemie, Journal Name: Angewandte Chemie Vol. 129 Journal Issue: 30; ISSN 0044-8249
Publisher:
Wiley Blackwell (John Wiley & Sons)Copyright Statement
Country of Publication:
Germany
Language:
English

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  • Molinari, Valerio; Giordano, Cristina; Antonietti, Markus
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journal January 2014
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