Tungsten(VI) oxide as a versatile support for Pd nanocatalysts for alkaline direct alcohol fuel cells

Gwebu, Sandile Surprise; Selepe, Cyril T.; Matthews, Thabo; Zikhali, Memory; Mashola, Tebogo Abigail; Mbokazi, Siyabonga Patrick; Makhunga, Thobeka Sipho; Maxakato, Nobanathi Wendy

doi:10.1016/j.ijhydene.2023.02.013

Cited by 10 publications

(1 citation statement)

References 51 publications

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“…Similarly, as a multifunctional support, WO 3 is widely used as an auxiliary support and co-catalyst for the electrooxidation of methanol and ethanol. Gwebu [78] deposited Pd nanoparticles on a composite support of functionalized carbon nanodots (FCNDs) and WO 3 by the borohydride reduction method, and demonstrated that the presence of WO 3 in Pd/FCNDs electrocatalysts improves the kinetics, tolerance to poisoning and alkaline conditions, and long-term durability under alkaline conditions. CV tests in 0.1 MKOH showed that the PdO reduction peak of the Pd/fCNDs catalysts appeared at À 0.66 V, and the PdO reduction peak shifted to À 0.92 V with the addition of WO 3 , indicating an improvement in electroactivity.…”

Section: Tungsten Oxide-based Electrocatalysts (Wo X )mentioning

confidence: 99%

Research progress of metal oxide supports for fuel cells electrocatalysts

Zhang,

Liu,

Wang

et al. 2024

ChemistrySelect

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Fuel cell technology, as a new way of energy conversion, is widely used in various fields. At present, the electrocatalyst, as one of the key components of the electrochemical reaction of fuel cells, still suffers from the problems of high cost, low activity and poor stability. Excellent fuel cell electrocatalysts must have excellent catalytic activity, anti‐poisoning ability, electrical conductivity and stability. Metal oxides with corrosion resistance, electrochemical stability and strong metal support interaction effects have been intensively studied. The influence of the synthesis method on the catalytic performance is also crucial. In this review, the importance of fuel cells and their catalysts is introduced. The characteristics of catalysts with three metal oxides, titanium dioxide, cerium dioxide and tungsten oxide, as supports, preparation methods and applications in different fuel cells are reviewed. The synthesis of metal oxide supported catalysts by impregnation, precipitation and hydrothermal methods is described. Finally, the research on metal oxide supported catalysts is prospected.

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Section: Tungsten Oxide-based Electrocatalysts (Wo X )mentioning

confidence: 99%

Research progress of metal oxide supports for fuel cells electrocatalysts

Zhang,

Liu,

Wang

et al. 2024

ChemistrySelect

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Outstanding Activity and Durability of Supported NiCo₂O₄ Nanoparticles for Direct Ethanol Fuel Cells

Afify,

Hameed,

Mohamed

et al. 2024

Applied Organom Chemis

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The rational design of noble metal‐free electrocatalysts represents one of the basic stones for fuel cell development. With the exploration of eco‐friendly nanomaterials for the investigated alcohol oxidation process, nickel‐based electrodes have been recognized as the most auspicious anodes with promoted activity and stability. In this work, a series of NiCo2O4 nanoparticles were deposited onto graphite sheets (NiCo2O4/T) introducing varied proportions of cobalt oxide species. Co‐precipitation protocol of the respective metallic hydroxides onto the carbonaceous support was followed with consecutive annealing in an air atmosphere at 400°C. The fabricated mixed metallic oxide nanopowder was physically studied using X‐ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), energy dispersive X‐ray analysis (EDX), X‐ray photoelectron spectroscopy (XPS), and selected area electron diffraction (SAED). Uniformly arranged nanoparticles were observed on graphite surface as evidenced by SEM and TEM. The cubic lattice structure of formed NiCo2O4 crystals was also confirmed by XRD through the defined peaks of binary metallic oxides clarifying their successful preparation scheme. The electrocatalytic properties of these NiCo2O4/T nanocatalysts were evaluated for oxidizing ethanol molecules in basic solution. Pronounced oxidation current densities were remarkably measured at NiCo2O4/T electrodes in relation to that at NiO/T. Differing the introduced cobalt oxide content into the synthesized nanocatalyst significantly controlled its catalytic performance. NiCo2O4/T‐20 exhibited the highest activity and stability among the prepared nanomaterials. Much decreased charge transfer resistances were also recorded at this electrode demonstrating its promoted electron transfer characteristics. This work could provide a reasonable route for the simple synthesis of comparable transition metallic oxides with promising attitudes for energy generation purposes.

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Facile Synthesis of Fiber‐Reinforced Catalyst for High Performance Ethanol and 2‐Propanol Oxidation

Bayat,

Akin,

Bekmezci

et al. 2024

Energy Tech

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In this study, Pd@TiO2 nanostructure is formed by using TiO2 fibers obtained by the electrospinning method and chemical reduction method, and this nanostructure is used in C2, and C3 alcohol oxidation studies as an application. In addition, TiO2 is compared with the Pd catalyst to investigate the effect of TiO2. In the results obtained, peak current values of 193 and 66.7 mA cm−2 for ethanol oxidation and 127.38 and 36.18 mA cm−2 for 2‐propanol oxidation are observed for Pd@TiO2 and Pd catalysts, respectively. With the addition of TiO2 to the structure, the electrocatalytic activity of C2 and C3 alcohol oxidations increases 3–3.5 times and contributes to the onset potential at an earlier potential. It also shows higher durability and stability in long‐term tests. Moreover, the addition of TiO2 to the structure enhances the electrocatalytic activity and provides high current density and long‐term stability in alcohol oxidation. These results show that fibrous structures in combination with metals improve the effect of catalysts and exhibit high potential for their application in alcohol fuel cells.

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Tungsten(VI) oxide as a versatile support for Pd nanocatalysts for alkaline direct alcohol fuel cells

Cited by 10 publications

References 51 publications

Research progress of metal oxide supports for fuel cells electrocatalysts

Research progress of metal oxide supports for fuel cells electrocatalysts

Outstanding Activity and Durability of Supported NiCo₂O₄ Nanoparticles for Direct Ethanol Fuel Cells

Facile Synthesis of Fiber‐Reinforced Catalyst for High Performance Ethanol and 2‐Propanol Oxidation

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Tungsten(VI) oxide as a versatile support for Pd nanocatalysts for alkaline direct alcohol fuel cells

Cited by 10 publications

References 51 publications

Research progress of metal oxide supports for fuel cells electrocatalysts

Research progress of metal oxide supports for fuel cells electrocatalysts

Outstanding Activity and Durability of Supported NiCo2O4 Nanoparticles for Direct Ethanol Fuel Cells

Facile Synthesis of Fiber‐Reinforced Catalyst for High Performance Ethanol and 2‐Propanol Oxidation

Contact Info

Product

Resources

About

Outstanding Activity and Durability of Supported NiCo₂O₄ Nanoparticles for Direct Ethanol Fuel Cells