Methanol oxidation reaction on core-shell structured Ruthenium-Palladium nanoparticles: Relationship between structure and electrochemical behavior

Kübler, Markus; Jurzinsky, Tilman; Ziegenbalg, Dirk; Cremers, Carsten

doi:10.1016/j.jpowsour.2017.07.114

Cited by 48 publications

(18 citation statements)

References 69 publications

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“…As mentioned, one way to enhance the overall reaction rate of the photocurrent is to use hole‐capture agents that facilitate the oxidation reaction, such as various alcohols, namely methanol. A further enhancement of the reaction can be the use of additional co‐catalysts for catalyzing methanol photoelectrochemical and electrochemical oxidation – typically these are noble metal based catalysts . An inexpensive alternative may be copper that has been reported as an efficient electrode for methanol electro‐oxidation.…”

Section: Introductionmentioning

confidence: 95%

Conductive Cu‐Doped TiO₂ Nanotubes for Enhanced Photoelectrochemical Methanol Oxidation and Concomitant Hydrogen Generation

et al. 2019

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Cu doping in titania is usually detrimental to the material's photoconductivity, which prevents the use of this combination in photoanodes. In this work, we produce TiO 2 nanotube arrays intrinsically doped with copper and establish sufficient conductivity to use them as efficient photoanodes for methanol oxidation in a photoelectrochemical hydrogen generation setting. Firstly, Cu-doped TiO 2 nanotubes were produced by anodizing a TiÀ Cu binary alloy. By subsequent thermal reduction of the structure in an Ar/H 2 environment, conductive copper-doped TiO 2 nanotubes (TiCuTNÀ Ar/H 2 ) can be achieved with an approximately 10 3 times higher conductivity than the non-reduced material. When these reduced Cu-doped TiO 2 nanotubes are used as photoanode, copper species embedded in the TiO 2 wall catalyze the methanol oxidation reaction. As a result of the combined effect of conductivity and catalytic effect of Cu, such reduced Cu:TiO 2 nanotubes can generate a photocurrent of 0.76 mA cm À 2 at 1 V vs. RHE, under AM1.5 (100 mW/ Cm 2 ) irradiation -in a 50 : 50 MeOH/water solution -this is 33 times higher than for pristine Cu:TiO 2 nanotubes.[a] S.

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Section: Introductionmentioning

confidence: 95%

Conductive Cu‐Doped TiO₂ Nanotubes for Enhanced Photoelectrochemical Methanol Oxidation and Concomitant Hydrogen Generation

et al. 2019

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“…The intense decay in current density because of the production and adsorption of intermediate carbonaceous species on the catalysts surface goes along with the block of active sites as well as poisoning of catalysts surface. [30][31][32][33][34][35][36][37][38][39][40] Aer an early intense drop in performance, the current densities were stabilized at 5.2 and 45.6 mA cm À2 for Pd/C and Pd-Cu aerogel, respectively. The very high catalytic activity and durability of the Pd-Cu aerogel than that of Pd/C are attributed to the two vital reasons: (1) the presence of abundant open pores as well as easy access to large active sites of Pd-Cu aerogel, and (2) the selfsupporting property of the Pd-Cu aerogel, which may hinder the loss of stability observed in Pd supported on carbon owing to corrosion.…”

Section: Structural Characteristicsmentioning

confidence: 99%

Porous three-dimensional network of Pd–Cu aerogel toward formic acid oxidation

et al. 2018

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“…argued that the deprotonated form of hydrated acetaldehyde (CH 3 CHOHO − ) is likely to be the main reactive species for acetaldehyde oxidation . Spendelow and Jurzinsky suggested that the mechanism of the MOR is similar to that of the EOR. Additionally, there are two possible pathways proceeding in parallel for the EGOR: either the hydroxyl group of glycolic is oxidized to products that are further oxidized to oxalic acid, or alternatively, the C−C bond is dissociated to form formic acid.…”

Section: Liquid Fuel Cellsmentioning

confidence: 99%

Recent Achievements in Noble Metal Catalysts with Unique Nanostructures for Liquid Fuel Cells

Sun

2020

ChemSusChem

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In recent years, research efforts have been focused on the design and fabrication of highly efficient catalysts for liquid fuel cells, because the use of these cells is an important approach for alleviating environmental pollution and energy crises. However, the limitations of the catalytic performance of industrial Pt/C have strongly hindered the development of these fuel cells. The catalyst morphology has a strong impact on its performance; nanostructured catalysts are preferred as they offer large specific surface area and more exposed active centers. In view of this, many catalysts with unique structures have been synthesized in recent years, all of which show excellent catalytic performance characteristics. Despite these achievements, few efforts have been made to survey this field comprehensively. Herein, the recent advances in catalysts for liquid fuel cells are summarized, with a focus on noble metal catalysts with unique morphologies such as nanowires, nanosheets, and assembly structures. Their formation mechanisms are discussed critically. The relationship between the unique morphologies and excellent performance of these catalysts is also explored. This work may provide guidelines for the further development of liquid fuel cells.

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Methanol oxidation reaction on core-shell structured Ruthenium-Palladium nanoparticles: Relationship between structure and electrochemical behavior

Cited by 48 publications

References 69 publications

Conductive Cu‐Doped TiO₂ Nanotubes for Enhanced Photoelectrochemical Methanol Oxidation and Concomitant Hydrogen Generation

Conductive Cu‐Doped TiO₂ Nanotubes for Enhanced Photoelectrochemical Methanol Oxidation and Concomitant Hydrogen Generation

Porous three-dimensional network of Pd–Cu aerogel toward formic acid oxidation

Recent Achievements in Noble Metal Catalysts with Unique Nanostructures for Liquid Fuel Cells

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Methanol oxidation reaction on core-shell structured Ruthenium-Palladium nanoparticles: Relationship between structure and electrochemical behavior

Cited by 48 publications

References 69 publications

Conductive Cu‐Doped TiO2 Nanotubes for Enhanced Photoelectrochemical Methanol Oxidation and Concomitant Hydrogen Generation

Conductive Cu‐Doped TiO2 Nanotubes for Enhanced Photoelectrochemical Methanol Oxidation and Concomitant Hydrogen Generation

Porous three-dimensional network of Pd–Cu aerogel toward formic acid oxidation

Recent Achievements in Noble Metal Catalysts with Unique Nanostructures for Liquid Fuel Cells

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Product

Resources

About

Conductive Cu‐Doped TiO₂ Nanotubes for Enhanced Photoelectrochemical Methanol Oxidation and Concomitant Hydrogen Generation

Conductive Cu‐Doped TiO₂ Nanotubes for Enhanced Photoelectrochemical Methanol Oxidation and Concomitant Hydrogen Generation