Atomic cobalt on nitrogen-doped graphene for hydrogen generation.
Nat Commun
; 6: 8668, 2015 Oct 21.
Article
em En
| MEDLINE
| ID: mdl-26487368
ABSTRACT
Reduction of water to hydrogen through electrocatalysis holds great promise for clean energy, but its large-scale application relies on the development of inexpensive and efficient catalysts to replace precious platinum catalysts. Here we report an electrocatalyst for hydrogen generation based on very small amounts of cobalt dispersed as individual atoms on nitrogen-doped graphene. This catalyst is robust and highly active in aqueous media with very low overpotentials (30 mV). A variety of analytical techniques and electrochemical measurements suggest that the catalytically active sites are associated with the metal centres coordinated to nitrogen. This unusual atomic constitution of supported metals is suggestive of a new approach to preparing extremely efficient single-atom catalysts.
Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Água
/
Cobalto
/
Grafite
/
Hidrogênio
/
Nitrogênio
Idioma:
En
Revista:
Nat Commun
Assunto da revista:
BIOLOGIA
/
CIENCIA
Ano de publicação:
2015
Tipo de documento:
Article
País de afiliação:
Estados Unidos