Pd-NiO decorated multiwalled carbon nanotubes supported on reduced graphene oxide as an efficient electrocatalyst for ethanol oxidation in alkaline medium

Rajesh, D.; Neel, Pulidindi Indra; Pandurangan, A.; Mahendiran, C.

doi:10.1016/j.apsusc.2018.02.174

Cited by 57 publications

(17 citation statements)

References 54 publications

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“…However, the micropores on Vulcan XC-72R are usually below 2 nm, making it hard for it to be completely interacted with most catalysts. In this regard, expanded graphite [78], graphene [79], carbon nanotubes [80], and their hybrids have aroused great interests which can promote the electrochemical activity of catalysts. Further, introducing various dopants and designing novel structures in the carbon-based materials serve as important strategies for further optimization of these support materials.…”

Section: Carbon-based Materialsmentioning

confidence: 99%

“…This may result in reduced surface areas and electrical conductivity of rGO, making it difficult to maximize the catalytic activities of rGO supported metal-based catalyst. To overcome the detrimental effects caused by rGO agglomeration, CNTs attached with Pd-NiO nanoparticles were fabricated and incorporated with rGO support (Figure 5e) [79]. The Pd-NiO/CNTs/rGO hybrid catalysts present much higher activity (90.9 mA cm −2 ) for EOR in alkaline solution than either hybrid Pd/CNTs/rGO (43.1 mA cm −2 ) or commercial Pd/C catalysts (28.0 mA cm −2 ).…”

Section: Carbon-based Materialsmentioning

confidence: 99%

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Advanced Catalytic Materials for Ethanol Oxidation in Direct Ethanol Fuel Cells

et al. 2020

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Direct ethanol fuel cells (DEFCs) have emerged as promising and advanced power systems that can considerably reduce fossil fuel dependence, and thus have attracted worldwide attention. DEFCs have many apparent merits over the analogous devices fed with hydrogen or methanol. As the key constituents, the catalysts for both cathodes and anodes usually face some problems (such as high cost, low conversion efficiency, and inferior durability) that hinder the commercialization of DEFCs. This review mainly focuses on the most recent advances in nanostructured catalysts for anode materials in DEFCS. First, we summarize the effective strategies used to achieve highly active Pt- and Pd-based catalysts for ethanol electro-oxidation, including composition control, microstructure design, and the optimization of support materials. Second, a few non-precious catalysts based on transition metals (such as Fe, Co, and Ni) are introduced. Finally, we outline the concerns and future development of anode catalysts for DEFCs. This review provides a comprehensive understanding of anode catalysts for ethanol oxidation in DEFCs.

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Section: Carbon-based Materialsmentioning

confidence: 99%

Section: Carbon-based Materialsmentioning

confidence: 99%

Advanced Catalytic Materials for Ethanol Oxidation in Direct Ethanol Fuel Cells

et al. 2020

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“…Alloying Pt or Pd with 3d transition metals provides a straightforward way to alter the electronic structure and optimize the binding energies of adsorbates on the catalyst surface 15–25. Creating synergistic catalysts via a combination of noble metals with oxophilic metal oxides/hydroxides proved a promising approach for improving the durability 26–34. In a rational catalyst design, the OH adspecies on the surface of oxides/hydroxides will facilitate the oxidative removal of carbonaceous intermediates adsorbed on the nearby Pd or Pt sites.…”

Section: Introductionmentioning

confidence: 99%

Hierarchical Nanostructured Pd/Co₃N‐Ni₃N as an Efficient Catalyst for Ethanol Electrooxidation in Alkaline Media

Tang

Gao

et al. 2020

Adv Materials Inter

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to synthesize multicomponent and/or nanocomposite catalysts. Alloying Pt or Pd with 3d transition metals provides a straightforward way to alter the electronic structure and optimize the binding energies of adsorbates on the catalyst surface. [15][16][17][18][19][20][21][22][23][24][25] Creating synergistic catalysts via a combination of noble metals with oxophilic metal oxides/hydroxides proved a promising approach for improving the durability. [26][27][28][29][30][31][32][33][34] In a rational catalyst design, the OH adspecies on the surface of oxides/ hydroxides will facilitate the oxidative removal of carbonaceous intermediates adsorbed on the nearby Pd or Pt sites.Recently, the search for synergistic phases was further extended to transition metal non-oxides, like phosphides, [35][36][37][38] sulfides, [39] carbides, [40,41] and nitrides. [42][43][44][45][46] In comparison with the corresponding oxides, metal non-oxides exhibit much more abundant physicochemical properties owing to the complex and tunable interactions between metals and non-oxygen elements. For instance, in contrast to the insulator nature of most oxides, transition metal non-oxides span a remarkable range of conductivity properties, from insulator to semiconductor and to metal. Evidently, a rich variety of metal non-oxides with diverse properties offers increased degrees of freedom in the design of synergestic catalysts for the EOR. Among the materials of choice, transition metal nitrides (TMNs) are highly appealing but less well explored candidates. Theoretical studies found that TMNs (like Ni 3 N) typically show moderate binding energies of OH species, implying a compromise between the activation of OH and poisoning of the surface with reaction intermediates. [47] This, together with their high electrical conductivity and good chemical stability, clearly suggests the potential of TMN as a component phase in the synergistic catalysis of EOR. [48,49] Herein, we report the synthesis of a carbon fiber clothsupported nanocomposite catalyst consisting of highly dispersed Pd nanoparticles on the porous Co 3 N-Ni 3 N nanowires using a hydrothermal method followed by ammonization treatment and electrochemical deposition. Our study found that incorporation of Co 3 N-Ni 3 N of metallic nature could effectively improve the poisoning tolerance, while preserving good electrical conductivity of the electrocatalyst. Furthermore, the resulting hierarchical nanostructure of Co 3 N-Ni 3 N from the applied synthesis methods ensures the exposure of abundant active sites and a favorable reactant/product mass transfer kinetics. As a consequence, the Pd/Co 3 N-Ni 3 N/CFC catalyst Creating synergistic active sites via combination of palladium (Pd) or platinum (Pt) with oxophilic metal compounds has been extensively investigated as a promising approach for developing active and robust electrocatalysts toward the ethanol oxidation reaction (EOR). Among the metal compounds of choice, transition metal nitrides are highly appealing but less well explored candidates. H...

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“…Rajesh et al. [25] synthesized Pd−NiO/MWCNT/rGO and studied its electrocatalytic response for ethanol oxidation. The electrocatalyst showed enhanced catalytic activity for ethanol.…”

Section: Introductionmentioning

confidence: 99%

Enhanced Electrocatalytic Activity of Methanol and Ethanol Oxidation in Alkaline Medium at Bimetallic Nanoparticles Electrochemically Decorated Fullerene‐C₆₀ Nanocomposite Electrocatalyst: An Efficient Anode Material for Alcohol Fuel Cell Applications

et al. 2020

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Direct alcohol fuel cells (DAFCs) have been recently playing a pivotal role in electrochemical energy sources and portable electronics. Research in DAFCs has proceeded to engage major attention due to their high catalytic activity, long‐term stability, portability, and low cost. Herein, we present a facile surfactant‐free route to anchor bimetallic Pd−W nanoparticles supported fullerene‐C60 catalyst (Pd‐W@Fullerene‐C60) for high‐performance electrooxidation of alcohols (methanol & ethanol) for DAFCs applications. Structural, elemental composition, and morphological analysis of the proposed catalyst were carried out using UV‐Vis spectroscopy, X‐ray diffraction (XRD), field emission scanning electron microscopy (FE‐SEM) and energy‐dispersive x‐ray spectroscopy (EDX). Electrochemical properties such as electrochemical activity, electrochemical active surface area (ECSA), and long‐term stability of the Pd‐W@Fullerene‐C60 catalyst for ethanol and methanol oxidation in the alkaline medium were explored by using cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS), and chronoamperometry (CA). Results revealed that the proposed catalyst showed enlarged ECSA, tremendous electrocatalytic activity, high poison tolerance limit, good reproducibility, and enhanced long‐term stability as compared to the monometallic catalyst and commercially available catalyst (Pt/C) towards ethanol and methanol oxidation reaction. This enhanced potentiality of the Pd‐W@Fullerene‐C60 catalyst is due to the synergistic effect of W−Pd nanoparticles and excellent electron kinetic from fullerene support material. These findings strongly suggest the Pd‐W@Fullerene‐C60 catalyst as potential anode material for the alcohol oxidation reaction.

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Pd-NiO decorated multiwalled carbon nanotubes supported on reduced graphene oxide as an efficient electrocatalyst for ethanol oxidation in alkaline medium

Cited by 57 publications

References 54 publications

Advanced Catalytic Materials for Ethanol Oxidation in Direct Ethanol Fuel Cells

Advanced Catalytic Materials for Ethanol Oxidation in Direct Ethanol Fuel Cells

Hierarchical Nanostructured Pd/Co₃N‐Ni₃N as an Efficient Catalyst for Ethanol Electrooxidation in Alkaline Media

Enhanced Electrocatalytic Activity of Methanol and Ethanol Oxidation in Alkaline Medium at Bimetallic Nanoparticles Electrochemically Decorated Fullerene‐C₆₀ Nanocomposite Electrocatalyst: An Efficient Anode Material for Alcohol Fuel Cell Applications

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Pd-NiO decorated multiwalled carbon nanotubes supported on reduced graphene oxide as an efficient electrocatalyst for ethanol oxidation in alkaline medium

Cited by 57 publications

References 54 publications

Advanced Catalytic Materials for Ethanol Oxidation in Direct Ethanol Fuel Cells

Advanced Catalytic Materials for Ethanol Oxidation in Direct Ethanol Fuel Cells

Hierarchical Nanostructured Pd/Co3N‐Ni3N as an Efficient Catalyst for Ethanol Electrooxidation in Alkaline Media

Enhanced Electrocatalytic Activity of Methanol and Ethanol Oxidation in Alkaline Medium at Bimetallic Nanoparticles Electrochemically Decorated Fullerene‐C60 Nanocomposite Electrocatalyst: An Efficient Anode Material for Alcohol Fuel Cell Applications

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Hierarchical Nanostructured Pd/Co₃N‐Ni₃N as an Efficient Catalyst for Ethanol Electrooxidation in Alkaline Media

Enhanced Electrocatalytic Activity of Methanol and Ethanol Oxidation in Alkaline Medium at Bimetallic Nanoparticles Electrochemically Decorated Fullerene‐C₆₀ Nanocomposite Electrocatalyst: An Efficient Anode Material for Alcohol Fuel Cell Applications