Effect of carbon nanofibers microstructure on electrocatalytic activities of Pd electrocatalysts for ethanol oxidation in alkaline medium

Qin, Yuan-Hang; Yang, Hou-Hua; Zhang, Xinsheng; Li, Ping; Ma, Chao

doi:10.1016/j.ijhydene.2010.05.034

Cited by 121 publications

(41 citation statements)

References 31 publications

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“…Qin et al [170][171][172] prepared Pd catalyst supported on carbon nanofibers (CNFs). The structure of the CNFs significantly affected the catalytic activity of the catalyst because the CNFs had high ratio of edge atoms to basal atoms and correspondingly faster electrode kinetics and stronger Pd-CNFs interaction.…”

Section: Pd Supported On Carbon Nanofibersmentioning

confidence: 99%

Recent Development of Pd-Based Electrocatalysts for Proton Exchange Membrane Fuel Cells

2015

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This review selectively summarizes the latest developments in the Pd-based cataysts for low temperature proton exchange membrane fuel cells, especially in the application of formic acid oxidation, alcohol oxidation and oxygen reduction reaction. The advantages and shortcomings of the Pd-based catalysts for electrocatalysis are analyzed. The influence of the structure and morphology of the Pd materials on the performance of the Pd-based catalysts were described. Finally, the perspectives of future trends on Pd-based catalysts for different applications were considered.

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Section: Pd Supported On Carbon Nanofibersmentioning

confidence: 99%

Recent Development of Pd-Based Electrocatalysts for Proton Exchange Membrane Fuel Cells

2015

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“…The ratio (If/Ib) of Pd/C and oxide-rich Pd0.9Cu0.1/C are 0.40 and 0.54, respectively. The catalyst tolerance for intermediate carbonaceous species accumulated on the electrode surface in the reaction can be measured by the ratio of the forward anodic peak current density (If) to the reverse anodic peak current density (Ib) [93]. The higher ratio of oxide-rich Pd0.9Cu0.1/C implied that the ethanol was more completely oxidized and there was less carbonaceous residue accumulated on the electrode surface [39].…”

Section: Electrochemical Performancementioning

confidence: 99%

Carbon Supported Oxide-Rich Pd-Cu Bimetallic Electrocatalysts for Ethanol Electrooxidation in Alkaline Media Enhanced by Cu/CuOx

Guo

Liu

et al. 2016

Catalysts

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Different proportions of oxide-rich PdCu/C nanoparticle catalysts were prepared by the NaBH 4 reduction method, and their compositions were tuned by the molar ratios of the metal precursors. Among them, oxide-rich Pd 0.9 Cu 0.1 /C (Pd:Cu = 9:1, metal atomic ratio) exhibits the highest electrocatalytic activity for ethanol oxidation reaction (EOR) in alkaline media. X-ray photoelectron spectroscopy (XPS) and high resolution transmission electron microscopy (HRTEM) confirmed the existence of both Cu and CuO x in the as-prepared Pd 0.9 Cu 0.1 /C. About 74% of the Cu atoms are in their oxide form (CuO or Cu 2 O). Besides the synergistic effect of Cu, CuO x existed in the Pd-Cu bimetallic nanoparticles works as a promoter for the EOR. The decreased Pd 3d electron density disclosed by XPS is ascribed to the formation of CuO x and the spill-over of oxygen-containing species from CuO x to Pd. The low Pd 3d electron density will decrease the adsorption of CH 3 CO ads intermediates. As a result, the electrocatalytic activity is enhanced. The onset potential of oxide-rich Pd 0.9 Cu 0.1 /C is negative shifted 150 mV compared to Pd/C. The oxide-rich Pd 0.9 Cu 0.1 /C also exhibited high stability, which indicated that it is a candidate for the anode of direct ethanol fuel cells (DEFCs).

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“…Palladium nanoparticles are important for ethanol oxidation in alkaline media (Qin, Yang, Zhang, Li, and Ma 2010;Qin, Yang, Zhang, Li, Zhou et al 2010) for several reasons.…”

Section: Introductionmentioning

confidence: 99%

Elecrochemical Determination of Ethanol by a Palladium Modified Graphene Nanocomposite Glassy Carbon Electrode

2016

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Pristine palladium nanoparticles were decorated on graphene nanosheets for the development of a low cost, non-enzymatic ethanol sensor. The nanocomposite was characterized by ultravioletvisible absorbance spectroscopy, infrared spectroscopy, and field emission scanning electron microscopy equipped with energy dispersive X-ray spectroscopy. Cyclic voltammetry and chronoamperometry were employed to quantify ethanol in alkaline media. A graphene palladium nanocomposite modified glassy carbon electrode provided a detection limit of 2 mM with a linear dynamic range of 2 to 210 mM for ethanol. The nanocomposite exhibited excellent stability for one hundred cyclic voltammetry scans. Ethanol oxidation was performed across a range of temperatures, unlike enzymatic-based sensors. Moreover, the catalytic material showed a low activation energy and low onset potentials for the oxidation of ethanol. Interference studies with congeners of ethanol in fermentation chambers showed good selectivity for the analyte. The enhanced catalytic activity for ethanol detection involves the combination of pristine palladium nanoparticles with the enhanced conductivity of graphene.

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Effect of carbon nanofibers microstructure on electrocatalytic activities of Pd electrocatalysts for ethanol oxidation in alkaline medium

Cited by 121 publications

References 31 publications

Recent Development of Pd-Based Electrocatalysts for Proton Exchange Membrane Fuel Cells

Recent Development of Pd-Based Electrocatalysts for Proton Exchange Membrane Fuel Cells

Carbon Supported Oxide-Rich Pd-Cu Bimetallic Electrocatalysts for Ethanol Electrooxidation in Alkaline Media Enhanced by Cu/CuOx

Elecrochemical Determination of Ethanol by a Palladium Modified Graphene Nanocomposite Glassy Carbon Electrode

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