期刊
NANO ENERGY
卷 13, 期 -, 页码 442-449出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.nanoen.2015.03.007
关键词
Core-shell nanoparticle; Nitride; Oxygen reduction; Electrocatalysis; Fuel cell; DFT
类别
资金
- US Department of Energy, Office of Basic Energy Science, Material Science and Engineering Division, Division of Chemical Sciences, Geosciences and Biosciences Division [DE-AC02-98CH10886]
- Synchrotron Catalysis Consortium
- US Department of Energy [DE-FG02-05ER15688]
- KIER's (Korea Institute of Energy Research) Research and Development Program [B4-2423]
- National Energy Research Scientific Computing Center [DE-AC02-05CH11231]
- National Research Council of Science & Technology (NST), Republic of Korea [B4-2423] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
Given the harsh operating conditions in hydrogen/oxygen fuel cells, the stability of catalysts is one of the critical questions affecting their commercialization. We describe a distinct class of oxygen reduction (ORR) core-shell electrocatalysts comprised of nitride metal cores enclosed by thin Pt shells that is easily synthesized. The synthesis is reproducible and amenable to scale up. Our theoretical analysis and the experimental data indicate that metal nitride nanoparticle cores could significantly enhance the ORR activity as well as the durability of the core-shell catalysts as a consequence of combined geometrical, electronic and segregation effects on the Pt shells. In addition to its fuel cells application, this class of catalysts holds promise to significantly contribute in resolving the problem of platinum scarcity and furthermore indicates the guidelines for future research and development. Published by Elsevier Ltd.
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