Structural analysis of PdRh/C and PdSn/C and its use as electrocatalysts for ethanol oxidation in alkaline medium

Fontes, E.H.; Ramos, Carlos Eduardo Domingues; Nandenha, J.; Piasentin, R. M.; Neto, Almir Oliveira; Landers, Richard

doi:10.1016/j.ijhydene.2018.11.049

Cited by 44 publications

(28 citation statements)

References 35 publications

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“…Up to now, some researchers focused on the PdSn bimetallic catalysts supporting on carbon blacks or carbon nanotubes [12,27,28], and other researchers aimed at various Pd nanoparticles supporting on modified graphene [20,29]. However, the synergistic effect of PdSn alloys and functional and/or doped graphene nanocomposites still needs to be illuminated.…”

Section: Introductionmentioning

confidence: 99%

High Active PdSn Binary Alloyed Catalysts Supported on B and N Codoped Graphene for Formic Acid Electro-Oxidation

Chen

Pei

et al. 2020

Catalysts

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A series of PdSn binary catalysts with varied molar ratios of Pd to Sn are synthesized on B and N dual-doped graphene supporting materials. The catalysts are characterized by X-ray diffraction (XRD) and Transmission electron microscopy (TEM). Formic acid electro-oxidation reaction is performed on these catalysts, and the results reveal that the optimal proportion of Pd:Sn is 3:1. X-ray photoelectron spectroscopy (XPS) measurements show that when compared with 3Pd1Sn/graphene, B and N co-doping into the graphene sheet can tune the electronic structure of graphene, favoring the formation of small-sized metallic nanoparticles with good dispersion. On the other hand, when compared with the monometallic counterparts, the incorporation of Sn can generate oxygenated species that help to remove the intermediates, exposing more active Pd sites. Moreover, the electrochemical tests illustrate that 3Pd1Sn/BN-G catalyst with a moderate amount of Sn exhibits the best catalytic activity and stability on formic acid electro-oxidation, owing to the synergistic effect of the Sn doping and the B, N co-doping graphene substrate.

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Section: Introductionmentioning

confidence: 99%

High Active PdSn Binary Alloyed Catalysts Supported on B and N Codoped Graphene for Formic Acid Electro-Oxidation

Chen

Pei

et al. 2020

Catalysts

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“…These unique features make Pd-based catalysts as important and promising alternatives in boosting EOR activity in alkaline electrolytes. Many metals (such as Ni [46][47][48], Sn [49,50], Ag [51,52], Au [53], Cu, Rh [49], and Ru [32]) or external additives (such as metal oxides [54,55] and hydroxides [56]) have been alloyed or mixed with Pd to form multicomponent systems with optimized catalytic performance and operational durability. Moreover, nanostructure engineering has been adopted to design Pd-based catalysts with enlarged surface areas and abundant active sites.…”

Section: Nanostructure Engineering and Composition Controlmentioning

confidence: 99%

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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“…nm, e menores que 20 nm para (A) e (B) e para a platina, próximas de 5 nm para todos os catalisadores [17,20]. [129,134]. É possível observar os estados de oxidação do Sn (II e IV) e do In (I e II), na superfície do ITO.…”

Section: Caracterização Física Dos Suportes Com Atounclassified

Síntese de suportes de eletrocatalisadores para aplicação em células a combustível poliméricas alimentadas por álcoois: óxido de índio dopado com estanho (ITO), óxido de estanho dopado com antimônio (ATO) e óxido de grafeno reduzido (rGO)

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Structural analysis of PdRh/C and PdSn/C and its use as electrocatalysts for ethanol oxidation in alkaline medium

Cited by 44 publications

References 35 publications

High Active PdSn Binary Alloyed Catalysts Supported on B and N Codoped Graphene for Formic Acid Electro-Oxidation

High Active PdSn Binary Alloyed Catalysts Supported on B and N Codoped Graphene for Formic Acid Electro-Oxidation

Advanced Catalytic Materials for Ethanol Oxidation in Direct Ethanol Fuel Cells

Síntese de suportes de eletrocatalisadores para aplicação em células a combustível poliméricas alimentadas por álcoois: óxido de índio dopado com estanho (ITO), óxido de estanho dopado com antimônio (ATO) e óxido de grafeno reduzido (rGO)

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