The Experts below are selected from a list of 195 Experts worldwide ranked by ideXlab platform
Zhengbo Jiao - One of the best experts on this subject based on the ideXlab platform.
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Facile synthesis of hollow Ag@AgBr heterostructures with highly efficient visible-light photocatalytic properties
CrystEngComm, 2014Co-Authors: Qingsong Dong, Zhengbo JiaoAbstract:A hollow Ag@AgBr photocatalyst was obtained by a replacement Reaction between Br− ions and solid Ag2CrO4 and a subsequent light-induced Chemical Reduction Reaction. The photocatalyst exhibits very high photocatalytic activity for the degradation of organic contaminants under visible-light irradiation.
Ramana G. Reddy - One of the best experts on this subject based on the ideXlab platform.
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Electrocatalytic properties of carbon supported cobalt phthalocyanine–platinum for methanol electro-oxidation
International Journal of Hydrogen Energy, 2008Co-Authors: Ramana G. ReddyAbstract:Abstract Electrocatalysts, based on carbon-supported cobalt phthalocyanine–platinum (CoPc–Pt/C), were prepared by Chemical Reduction Reaction and heat-treatment. Thermogravimetric analysis, EDX, X-ray photoelectron spectroscopy and X-ray diffraction techniques were employed to investigate structural and physical properties of catalysts. The electroChemical behavior of catalysts for methanol electro-oxidation was evaluated by cyclic voltammetry. Compared with Pt/C and PtCo/C catalysts, CoPc–Pt/C catalyst heated at 980 ∘ C (C980) exhibited the best electroChemical performance for methanol electro-oxidation. C980 accelerated kinetics for methanol oxidation and produces a high methanol oxidation current that is almost twice that of pure platinum. C980 also improved its resistance to methanol poisoning. Hence, it can be concluded that C980 is a good anodic catalyst for DMFC.
Qingsong Dong - One of the best experts on this subject based on the ideXlab platform.
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Facile synthesis of hollow Ag@AgBr heterostructures with highly efficient visible-light photocatalytic properties
CrystEngComm, 2014Co-Authors: Qingsong Dong, Zhengbo JiaoAbstract:A hollow Ag@AgBr photocatalyst was obtained by a replacement Reaction between Br− ions and solid Ag2CrO4 and a subsequent light-induced Chemical Reduction Reaction. The photocatalyst exhibits very high photocatalytic activity for the degradation of organic contaminants under visible-light irradiation.
Ruizhi Zhu - One of the best experts on this subject based on the ideXlab platform.
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Pt nanoparticles modified Au dendritic nanostructures: Facile synthesis and enhanced electrocatalytic performance for methanol oxidation
International Journal of Hydrogen Energy, 2017Co-Authors: Hongmei Jia, Gang Chang, Honghui Shu, Xunying Wang, Zaoli Zhang, Xiong Liu, Wang Kai, Ruizhi ZhuAbstract:Abstract A facile and simple method is presented for the synthesis of bimetallic composites, Pt nanoparticles modified dendritic Au nanostructures (PtNPs/DGNs), in which dendritic Au was deposited on a glassy carbon electrode via a potentiostatic method and sphere-like Pt nanoparticles were decorated on Au substrates through a Chemical Reduction Reaction. The compositions, morphologies, and structures of the PtNPs/DGNs were characterized by X-ray photoelectron spectroscopy, field emission scanning electron microscopy, and energy dispersive X-ray spectroscopy. Results indicated that bimetallic composites were successfully synthesized and spherical Pt nanoparticles were dispersed evenly on dendritic Au substrates. The number of Pt nanoparticles on Au surface was regulated by controlling the Chemical Reduction deposition time, allowing the electrocatalytic properties of the composite towards methanol oxidation to be tuned. ElectroChemical measurements, including cyclic voltammetry and chronoamperometry, were performed to investigate the electroChemical properties and electrocatalytic behaviors of the PtNPs/DGNs towards methanol oxidation. Pt nanoparticles partially covered dendritic Au exhibited dramatically enhanced electrocatalytic activity (3.947 mA cm−2), which was 2.65 times that of commercial carbon-supported Pt nanoparticles (1.487 mA cm−2), along with much improved poisoning tolerance (current decline: 70.85% vs 99.36%). These enhanced performances were likely caused by the large active electroChemical area of the bimetallic nanocomposites and the change in the electronic structure of Pt when the Au surface was modified with fewer Pt nanoparticles.
Young-uk Kwon - One of the best experts on this subject based on the ideXlab platform.
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SonoChemical synthesis of tungsten carbide–palladium nanocomposites and their electrocatalytic activity for hydrogen oxidation Reaction
Electrochimica Acta, 2009Co-Authors: Ji-hoon Jang, Juyeong Kim, Yang-hee Lee, Chanho Pak, Young-uk KwonAbstract:Abstract Nanocomposites between β-WC and Pd nanoparticles supported on carbon are synthesized and their electrocatalytic properties for the hydrogen oxidation Reaction have been investigated. The Pd nanoparticles are obtained by a Chemical Reduction Reaction of PdCl 2 and the β-WC nanoparticles by a sonoChemical decomposition of W(CO) 6 on Pd-loaded carbon followed by heat-treatment. Depending on the relative amounts of W to Pd, the Pd nanoparticles can be reacted with W to form Pd–W alloy nanoparticles. The Pd–W alloy, whose composition is estimated to have W less than 18 at.% based on its lattice parameter, lost most of the catalytic activity of Pd. On the other hand, the nanocomposite between β-WC and pure Pd shows an enhanced activity compared with that of Pd nanoparticles alone. This enhancement can be explained with the H + -spill-over to β-WC.