TY - JOUR
T1 - Enhanced electroactivity for the oxygen reduction on Ni@Pt core-shell nanocatalysts
AU - Godínez-Salomón, F.
AU - Hallen-López, M.
AU - Solorza-Feria, O.
N1 - Funding Information:
The authors gratefully acknowledge Ph.D. Mayahuel Ortega and Adolfo Tavira, for their invaluable assistance in carrying TEM and XRD measurements. The authors acknowledge the support of the Mexico’s National Polytechnique Institute for the doctoral fellowships, grant SIP-2010-1029 . Part of this work is also supported by CONACYT grant 101537 .
PY - 2012/10
Y1 - 2012/10
N2 - The synthesis of nickel decorated platinum core-shell nanocatalyst for the oxygen reduction reaction (ORR) in acid media is presented. The nanocatalysts prepared through colloidal reduction of NiCl 2 with NaBH 4 produce Ni core and subsequent reduction of H 2PtCl 6 enables the core-shell structure. Heat-treatment of as-prepared Ni@Pt in hydrogen atmosphere causes change in surface structure due to strong segregation of remaining Ni particle on topmost layer of Ni@Pt alloy, while performing different cycle in cyclic voltammetry remove the top layer of Ni particle; additionally a markedly Ni@Pt stabilization favor the enhanced electrocatalytic activity toward ORR. Ni@Pt core-shell structure was physical characterized using XRD, SEM and TEM techniques. Results indicate average particles of about 7.5 nm in size. Cyclic voltammetry on thin-film rotating disk electrode reveals that Ni@Pt nanoparticles, before and after thermal treatment, have more than twice enhanced catalytic activity than Pt nanoparticles synthesized by the same way.
AB - The synthesis of nickel decorated platinum core-shell nanocatalyst for the oxygen reduction reaction (ORR) in acid media is presented. The nanocatalysts prepared through colloidal reduction of NiCl 2 with NaBH 4 produce Ni core and subsequent reduction of H 2PtCl 6 enables the core-shell structure. Heat-treatment of as-prepared Ni@Pt in hydrogen atmosphere causes change in surface structure due to strong segregation of remaining Ni particle on topmost layer of Ni@Pt alloy, while performing different cycle in cyclic voltammetry remove the top layer of Ni particle; additionally a markedly Ni@Pt stabilization favor the enhanced electrocatalytic activity toward ORR. Ni@Pt core-shell structure was physical characterized using XRD, SEM and TEM techniques. Results indicate average particles of about 7.5 nm in size. Cyclic voltammetry on thin-film rotating disk electrode reveals that Ni@Pt nanoparticles, before and after thermal treatment, have more than twice enhanced catalytic activity than Pt nanoparticles synthesized by the same way.
KW - Core-shell nanoparticles
KW - Electrocatalyst
KW - Oxygen reduction reaction
KW - Synthesis of Ni@Pt
UR - http://www.scopus.com/inward/record.url?scp=84866087988&partnerID=8YFLogxK
U2 - 10.1016/j.ijhydene.2012.01.157
DO - 10.1016/j.ijhydene.2012.01.157
M3 - Artículo
AN - SCOPUS:84866087988
SN - 0360-3199
VL - 37
SP - 14902
EP - 14910
JO - International Journal of Hydrogen Energy
JF - International Journal of Hydrogen Energy
IS - 19
ER -
