期刊
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
卷 56, 期 30, 页码 8828-8833出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201704632
关键词
carbides; CO tolerance; core-shell nanoparticles; electrocatalysis; nitrides
资金
- U.S. Department of Energy, Office of Basic Energy Sciences [DE-SC0016214, DE-SC0014058]
- National Science Foundation [1122374]
- Swiss National Science Foundation [P2EZP2_159124]
- Sao Paulo Research Foundation [FAPESP 2015/23900-2, 2015/50375-6]
- National Council of Technological and Scientific Development [CNPq 309373/2014-0]
- DOE Office of Science [DE-AC02-06CH11357]
- Swiss National Science Foundation (SNF) [P2EZP2_159124] Funding Source: Swiss National Science Foundation (SNF)
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.
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