Journal ArticleDOI
Rapid Synthesis of a Pt1Ru1/Carbon Nanocomposite Using Microwave Irradiation: A DMFC Anode Catalyst of High Relative Performance
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In this paper, thermal treatment of (η-C2H4)(Cl)Pt(μ-Cl)2Ru(Cl)(η 3:η3-2,7-dimethyl octadienediyl) (1)/Vulcan carbon composites under appropriate oxidizing and reducing conditions using microwave dielectric loss heating affords PtRu/VulCAN carbon nanocomposites consisting of PtRu alloy nanoparticles highly dispersed on a powdered carbon support.Abstract:
Thermal treatment of (η-C2H4)(Cl)Pt(μ-Cl)2Ru(Cl)(η3:η3-2,7-dimethyloctadienediyl) (1)/Vulcan carbon composites under appropriate oxidizing and reducing conditions using microwave dielectric loss heating affords PtRu/Vulcan carbon nanocomposites consisting of PtRu alloy nanoparticles highly dispersed on a powdered carbon support. Two such nanocomposites containing 16 or 50 wt % total metal and alloy nanoclusters of 3.4- or 5.4-nm average diameter are formed within only 100 or 300 s of total microwave heating. XRD and on-particle EDS analyses reveal that complex 1 serves as a reliable single-source molecular precursor for the formation of PtRu nanoparticles having a nearly 1:1 metal alloy stoichiometry. Preliminary measurements of the catalytic activity of these nanocomposites as supported direct methanol fuel cell (DMFC) anode catalysts indicate that the 50 wt % nanocomposite has a performance superior to that of a 60 wt % commercial catalyst and a normalized performance equivalent to that of a proprietary...read more
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Journal ArticleDOI
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.
Journal ArticleDOI
Preparation and Characterization of Multiwalled Carbon Nanotube-Supported Platinum for Cathode Catalysts of Direct Methanol Fuel Cells
TL;DR: In this paper, a multiwalled carbon nanotube-supported Pt (Pt/MWNT) nanocomposites were prepared by both the aqueous solution reduction of a Pt salt (HCHO reduction) and the reduction of an ion salt in ethylene glycol solution.
Journal ArticleDOI
Multifunctional 3D nanoarchitectures for energy storage and conversion.
Debra R. Rolison,Jeffrey W. Long,Justin C. Lytle,Anne E. Fischer,Christopher P. Rhodes,Todd M. McEvoy,Megan E. Bourg,Alia M. Lubers +7 more
TL;DR: The design and fabrication of three-dimensional multifunctional architectures from the appropriate nanoscale building blocks, including the strategic use of void space and deliberate disorder as design components, permits a re-examination of devices that produce or store energy as discussed in this critical review.
Journal ArticleDOI
Preparation of CuO nanoparticles by microwave irradiation
TL;DR: In this paper, as-prepared CuO nanoparticles with an average size of ca. 4nm have been successfully prepared by microwave irradiation, using copper (II) acetate and sodium hydroxide as the starting materials and ethanol as the solvent.
Journal ArticleDOI
Carbon nanotubes as support for cathode catalyst of a direct methanol fuel cell
Wenzhen Li,Changhai Liang,Jieshan Qiu,Weijiang Zhou,Hongmei Han,Zhaobin Wei,Gongquan Sun,Qin Xin +7 more
TL;DR: Suzuki et al. as mentioned in this paper studied the structural change of activated carbon with desorption by in situ X-ray diffraction and showed that carbon graphitization-controlled microporous carbon upon adsorp-1988;26:743-5.
References
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Transmission Electron Microscopy
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Combinatorial Electrochemistry: A Highly Parallel, Optical Screening Method for Discovery of Better Electrocatalysts
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Structure and Chemical Composition of a Supported Pt-Ru Electrocatalyst for Methanol Oxidation
TL;DR: In this paper, high-resolution electron microscopy and X-ray microchemical analysis were used to characterize the composition, size, distribution, and morphology of Pt-Ru particles with nominal Pt:Ru ratios of 1:1 and 3:1, supported on carbon black.
Journal ArticleDOI
Mechanism and electrocatalysis in the direct methanol fuel cell
TL;DR: In this paper, a unified treatment of the mechanism of electrocatalysis of methanol oxidation on platinum and platinum-containing alloys is put forward, and the effect of various alloys are shown to be interpretable within this overall model.
Journal Article
Microwave Processing of Ceramic Materials
TL;DR: In this paper, a synthese sur les avantages de l'utilisation d'hyperfrequences for les traitements thermiques des ceramiques is presented.