Pt nanoparticles supported on mesoporous carbon nanocomposites incorporated with Ni or Co nanoparticles for fuel cells

TY - JOUR

T1 - Pt nanoparticles supported on mesoporous carbon nanocomposites incorporated with Ni or Co nanoparticles for fuel cells

AU - Su, Fabing

AU - Poh, Chee Kok

AU - Zeng, Jianhuang

AU - Zhong, Ziyi

AU - Liu, Zhaolin

AU - Lin, Jianyi

N1 - Funding Information: Financial supports from Hundred Talents Program of the Chinese Academy of Sciences , National Natural Science Foundation of China (No. 21031005 ), State Key Laboratory of Multiphase Complex Systems , and Scientific Research Foundation for the Returned Overseas Chinese Scholars (State Education Ministry) are gratefully acknowledged.

PY - 2012/5/1

Y1 - 2012/5/1

N2 - We report the preparation and characterization of mesoporous carbon nanocomposites with Ni and Co nanoparticles incorporated into the pore walls, which are synthesized via template strategy by sucrose-impregnation and benzene chemical vapor deposition (CVD) routes separately. Pt nanoparticles supported on the nanocomposites for oxygen reduction reaction (ORR) and methanol oxidation reaction (MOR) in fuel cells are fabricated via hydrogen reduction method. It is found that the introduction of metal nanoparticles into the pore walls of carbon materials via both synthesis routes had negligible change in pore structure. Highly dispersed Pt nanoparticles supported on nanocomposites synthesized by sucrose-impregnation method shows better catalytic activities for both ORR and MOR than that on those by CVD method and greatly improve the limiting current densities for ORR. The promotional effect of Ni on the catalytic activity of Pt catalysts for both ORR and MOR is evidenced in nanocomposites obtained with sucrose-impregnation method, but not with CVD method. Interesting results revealed that Ni performed as a better promoter in MOR while Co is a better promoter in ORR. Our investigation not only provides further insight on the roles of Ni and Co in ORR and MOR, but also can assist the design and synthesis of the new nanostructured electrocatalyst supports.

AB - We report the preparation and characterization of mesoporous carbon nanocomposites with Ni and Co nanoparticles incorporated into the pore walls, which are synthesized via template strategy by sucrose-impregnation and benzene chemical vapor deposition (CVD) routes separately. Pt nanoparticles supported on the nanocomposites for oxygen reduction reaction (ORR) and methanol oxidation reaction (MOR) in fuel cells are fabricated via hydrogen reduction method. It is found that the introduction of metal nanoparticles into the pore walls of carbon materials via both synthesis routes had negligible change in pore structure. Highly dispersed Pt nanoparticles supported on nanocomposites synthesized by sucrose-impregnation method shows better catalytic activities for both ORR and MOR than that on those by CVD method and greatly improve the limiting current densities for ORR. The promotional effect of Ni on the catalytic activity of Pt catalysts for both ORR and MOR is evidenced in nanocomposites obtained with sucrose-impregnation method, but not with CVD method. Interesting results revealed that Ni performed as a better promoter in MOR while Co is a better promoter in ORR. Our investigation not only provides further insight on the roles of Ni and Co in ORR and MOR, but also can assist the design and synthesis of the new nanostructured electrocatalyst supports.

KW - Characterization

KW - Electrochemical catalysis

KW - Fuel cells

KW - Mesoporous carbon nanocomposites

KW - Pt catalyst

UR - http://www.scopus.com/inward/record.url?scp=84857374181&partnerID=8YFLogxK

U2 - 10.1016/j.jpowsour.2012.01.050

DO - 10.1016/j.jpowsour.2012.01.050

M3 - 文章

AN - SCOPUS:84857374181

VL - 205

SP - 136

EP - 144

JO - Journal of Power Sources

JF - Journal of Power Sources

SN - 0378-7753

ER -