Acid Treatments of Carbon Nanotubes and Their Application as Pt-Ru/ CNT Anode Catalysts for Proton Exchange Membrane Fuel Cell

김민식; Sinmuk Lim; Min Young Song (송민영); Hyunjin Cho (조현진); 최윤호; 유종성

Acid Treatments of Carbon Nanotubes and Their Application as Pt-Ru/ CNT Anode Catalysts for Proton Exchange Membrane Fuel Cell

Carbon Letters
Abbr : Carbon Lett.
2010, 11(3), pp.224-230
Publisher : Korean Carbon Society
Research Area : Natural Science > Natural Science General > Other Natural Sciences General

김민식 ¹, Sinmuk Lim ¹, Min Young Song ¹, Hyunjin Cho ², 최윤호 ², 유종성 ¹

¹고려대학교
²충남대학교

Candidate

ABSTRACT

Various oxidation treatments on CNTs using diluted 4.0 M H2SO4 solution at room temperature or at 90oC reflux conditions were investigated to elucidate the physical and chemical changes, occurring on the treated CNTs, which might have significant effects on their performance as catalyst supports in PEM fuel cells. Raman spectroscopy X-ray diffraction and transmission electron microscope analyses were made for acid treated CNTs to determine the particle size and distribution of the CNT-supported Pt-Ru nanoparticles. These CNT-supported Pt-based nanoparticles were then employed as anode catalysts in PEMFC to investigate their catalytic activity and single-cell performance towards H2 oxidation. Based on PEMFC performance results, refluxed Pt-Ru/CNT catalysts prepared using CNTs treated at 90oC for 0.5 h as anode have shown better catalytic activity and PEMFC polarization performance than those of the commercially available Pt-Ru/C catalyst from ETEK and other Pt-Ru/CNT catalysts developed using raw CNT, demonstrating the importance of acid treatment for CN- based catalysts to optimized surface properties CNT, thus demonstrating the importance of acid treatment in improving and optimizing the surface properties of catalyst support.

KEYWORDS

CNT, surface treatment, Electrocatalyst, Anode, Proton exchange membrane fuel cell

Citation status

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