| Full text | |
| Author(s): |
Garg, Aaron
;
Milina, Maria
;
Ball, Madelyn
;
Zanchet, Daniela
;
Hunt, Sean T.
;
Dumesic, James A.
;
Roman-Leshkov, Yuriy
Total Authors: 7
|
| Document type: | Journal article |
| Source: | ANGEWANDTE CHEMIE-INTERNATIONAL EDITION; v. 56, n. 30, p. 8828-8833, JUL 17 2017. |
| Web of Science Citations: | 27 |
| 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. (AU) | |
| FAPESP's process: | 15/23900-2 - Earth-abundant materials as next-generation catalytic platforms for the conversion of lignocellulosic biomass |
| Grantee: | Daniela Zanchet |
| Support Opportunities: | Scholarships abroad - Research |
| FAPESP's process: | 15/50375-6 - Engineering co-resistant catalysts for hydrogen gas clean-up |
| Grantee: | Daniela Zanchet |
| Support Opportunities: | Regular Research Grants |