Platinum-catalyzed carbon nanotubes for durability enhancement of low-temperature fuel cells

The Pt-catalyzed carbon nanotubes (CNT(Pt)) synthesized in powder form manifests extremely durable Pt catalytic properties. Compared with traditional Pt nanoparticle catalysts, CNT(Pt) exhibits abnormally increased cyclic voltammerty peak areas versus time. This experimental observation not reported...

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Bibliographic Details
Published in:Journal of power sources 2013-02, Vol.223, p.246-253
Main Authors: Ha, Byeongchul, Han, Oc Hee
Format: Article
Language:English
Subjects:
Alternative fuels. Production and utilization
Applied sciences
Carbon nanotubes
Catalysis
Catalyst
Catalysts: preparations and properties
Chemistry
Direct energy conversion and energy accumulation
Durability
Electrical engineering. Electrical power engineering
Electrical power engineering
Electrochemical conversion: primary and secondary batteries, fuel cells
Energy
Energy. Thermal use of fuels
Equipments for energy generation and conversion: thermal, electrical, mechanical energy, etc
Exact sciences and technology
Fuel cells
Fuels
General and physical chemistry
Hydrogen
Platinum
Theory of reactions, general kinetics. Catalysis. Nomenclature, chemical documentation, computer chemistry
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Summary:The Pt-catalyzed carbon nanotubes (CNT(Pt)) synthesized in powder form manifests extremely durable Pt catalytic properties. Compared with traditional Pt nanoparticle catalysts, CNT(Pt) exhibits abnormally increased cyclic voltammerty peak areas versus time. This experimental observation not reported previously is explained by the increased catalytic surface areas resulting from newly created crystalline Pt nanoparticles and nanosheets outside carbon nanotubes during repeated potential cycles. CNT(Pt) can initiate a new phase of the research taking an advantage of combined effects of various properties of CNTs (for example, hydrogen-storage capability) and Pt (for example, high catalytic activity). [Display omitted] ► Pt-catalyzed carbon nanotubes (CNT(Pt)) were synthesized in powder form. ► Current-density peak-areas of CNT(Pt) were increased by repeated potential cycles. ► Repeated potential cycles induced the formation of Pt nanoparticles outside CNTs. ► Extremely durable Pt catalytic properties of CNT(Pt) are useful for fuel cells.
ISSN:0378-7753
1873-2755
DOI:10.1016/j.jpowsour.2012.09.065