Journal ArticleDOI
Physical and Electrochemical Characterizations of Microwave-Assisted Polyol Preparation of Carbon-Supported PtRu Nanoparticles
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TLDR
It was found that both PtRu/C catalysts had high and more durable electrocatalytic activities for methanol oxidation than a comparative Pt/C catalyst.Abstract:
PtRu nanoparticles supported on Vulcan XC-72 carbon and carbon nanotubes were prepared by a microwave-assisted polyol process. The catalysts were characterized by transmission electron microscopy, X-ray diffraction, and X-ray photoelectron spectroscopy (XPS). The PtRu nanoparticles, which were uniformly dispersed on carbon, were 2−6 nm in diameter. All PtRu/C catalysts prepared as such displayed the characteristic diffraction peaks of a Pt face-centered cubic structure, excepting that the 2θ values were shifted to slightly higher values. XPS analysis revealed that the catalysts contained mostly Pt(0) and Ru(0), with traces of Pt(II), Pt(IV), and Ru(IV). The electro-oxidation of methanol was studied by cyclic voltammetry, linear sweep voltammetry, and chronoamperometry. It was found that both PtRu/C catalysts had high and more durable electrocatalytic activities for methanol oxidation than a comparative Pt/C catalyst. Preliminary data from a direct methanol fuel cell single stack test cell using the Vulcan...read more
Citations
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Chemistry and properties of nanocrystals of different shapes.
TL;DR: The interest in nanoscale materials stems from the fact that new properties are acquired at this length scale and, equally important, that these properties are equally important.
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A review of anode catalysis in the direct methanol fuel cell
Hansan Liu,Chaojie Song,Lei Zhang,Jiujun Zhang,Haijiang Wang,David P. Wilkinson,David P. Wilkinson +6 more
TL;DR: More than 100 articles related to anode catalysts for the direct methanol fuel cell (DMFC) are reviewed, mainly focusing on the three most active areas: (1) progress in preparation methods of Pt-Ru catalysts with respect to activity improvement and utilization optimization; (2) preparation of novel carbon materials as catalyst supports to create a highly dispersed and stably supported catalysts; (3) exploration of new catalysts having a low noble metal content and non-noble metal elements through fast activity down-selection methods such as combinatorial methods.
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Platinum-based nanostructured materials: synthesis, properties, and applications.
Aicheng Chen,Peter Holt-Hindle +1 more
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Support materials for PEMFC and DMFC electrocatalysts—A review
Surbhi Sharma,Bruno G. Pollet +1 more
TL;DR: In this paper, the performance and issues associated with a variety of carbon based materials such as carbon nanotubes (CNT), carbon nanofibers (CNF), mesoporous carbon and graphene as well as non-carbonaceous based materials, e.g. titania, indium oxides, alumina, silica and tungsten oxide and carbide, ceria, zirconia nanostructures and conducting polymers catalyst support materials are clearly described in this review.
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Recent advances in activity and durability enhancement of Pt/C catalytic cathode in PEMFC. Part II: Degradation mechanism and durability enhancement of carbon supported platinum catalyst
Xingwen Yu,Siyu Ye +1 more
TL;DR: In this article, the authors reviewed the recent advances in the stability improvement of the Pt/C cathodic catalysts in PEMFC, especially focusing on the durability enhancement through the improved Pt-C interaction.
References
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Journal ArticleDOI
Chemical and Electronic Effects of Ni in Pt/Ni and Pt/Ru/Ni Alloy Nanoparticles in Methanol Electrooxidation
Kyung-Won Park,Jong-Ho Choi,Boo-Kil Kwon,and Seol-Ah Lee,Yung-Eun Sung,Heung-Yong Ha and,Seong Ahn Hong,Hongsun Kim and,Andrzej Wieckowski +8 more
TL;DR: In this paper, the role of Ni as a catalytically enhancing agent in the methanol oxidation process was investigated using cyclic voltammetry, chronoamperometry, X-ray photoelectron spectroscopy, transmission electron microscopy, and Xray diffraction.
Journal ArticleDOI
Carbon monoxide electrooxidation on well-characterized platinum-ruthenium alloys
TL;DR: In this paper, the electrocatalytic activity of well-characterized Pt-Ru alloy electrodes toward the electrooxidation of CO in acidic electrolyte at room temperature was measured on alloy surfaces prepared in UHV (ultrahigh vacuum).
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Preparation of highly dispersed Pt+Ru alloy clusters and the activity for the electrooxidation of methanol
TL;DR: In this article, the Pt + Ru binary catalyst has been developed which provides a simple way of obtaining a specific surface area (ca. 80 m2 g−1) more than 3 times larger than that obtained by conventional methods.
Journal ArticleDOI
Preparation and characterization of platinum-based electrocatalysts on multiwalled carbon nanotubes for proton exchange membrane fuel cells
TL;DR: In this paper, a higher yield of functionalized carbon nanotubes (CNTs) was obtained by treatment of CNTs in HNO3 or H2SO4−K2Cr2O7.
Journal ArticleDOI
High performance direct methanol polymer electrolyte fuel cells
TL;DR: In this article, a decal transfer method was used to apply thin-film catalyst/ionomer composite layers to Nation® membranes and achieved a maximum power density of 250 mW/cm2.