In:
ECS Transactions, The Electrochemical Society, Vol. 35, No. 32 ( 2011-10-11), p. 77-83
Abstract:
In order to identify the active sites for the oxygen reduction reaction (ORR) in a partially oxidized Niobium carbo-nitride (Nb-CNO) catalyst, we investigated the structure of Nb-CNO catalysts by using conversion-electron-yield x-ray absorption spectroscopy (CEY-XAS). CEY-XAS measurements made it possible to selectively analyze the surface oxide phases in Nb-CNO catalysts with Nb2O5/NbCN core-shell structures. The result showed the decrease of the coordination numbers for Nb-O surface oxide phases in ORR active Nb-CNO particles, indicating that oxygen vacancies were introduced in the surface oxide phase. Thus, oxygen vacancies could work as the active sites for ORR in Nb-CNO, similar to Ta-CNO ORR catalysts.
Type of Medium:
Online Resource
ISSN:
1938-5862
,
1938-6737
Language:
Unknown
Publisher:
The Electrochemical Society
Publication Date:
2011
detail.hit.zdb_id:
2217591-X
detail.hit.zdb_id:
2251888-5
Permalink