Carbon monoxide and ethanol oxidation on PtSn supported catalysts: Effect of the nature of the carbon support and Pt:Sn composition

Asgardi, Jaime; Calderón, Juan Carlos; Alcaide, Francisco; Querejeta, Amaia; Calvillo, Laura; Lázaro, M.J.; Garcı́a, Gonzalo; Pastor, E.

doi:10.1016/j.apcatb.2014.12.003

Cited by 68 publications

(43 citation statements)

References 60 publications

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“…In contrast, the report by Pastor et al. shows that the Pt−Sn catalyst with 1 : 1 ratio and supported on Vulcan XC‐72R has a high catalytic activity in DEFC tests, contrasting with its poor behavior during CO oxidation . Therefore, understanding the effects of the Pt : Sn atomic ratio on the catalytic activity in half cell and DEFC experiments of Pt−Sn/C catalysts is still an active field of research.…”

Section: Introductionmentioning

confidence: 99%

Performance and In‐Situ FTIR Evaluation of Pt−Sn/C Electrocatalysts with Several Pt : Sn Atomic Ratios for the Ethanol Oxidation Reaction in Acidic Media

González-Quijano

Pech-Rodríguez²,

González-Quijano

et al. 2018

ChemElectroChem

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Pt−Sn/C electrocatalysts with nominal Pt : Sn atomic ratios of 1 : 1, 2 : 1 and 3 : 1 were synthesized via the polyol method. The effects of the atomic ratios on their catalytic activity for the ethanol oxidation reaction (EOR) in acidic media was evaluated and compared to a Pt/C electrocatalyst obtained by the same procedure. The differences in reaction mechanism between the alloys and Pt/C were elucidated by in‐situ FTIR measurements. XRD characterization of the Pt−Sn/C electrocatalysts showed a degree of alloying ranging between 27 and 54 % (from Vegard's law), while crystallite sizes close to 2.2 nm were determined with the Scherrer equation. Pt : Sn atomic ratios of 1 : 1, 1.6 : 1 and 2.4 : 1 were found experimentally via EDS analysis, fairly close to the nominally expected values. Electrochemical evaluation indicated that the alloy having a 1 : 1 ratio has the highest electrocatalytic activity for EOR. In‐situ FTIR characterization showed that the Pt−Sn/C alloys promote the oxidation of ethanol via a triple parallel pathway: one path involving the directly conversion of COL (linearly‐bonded CO) to CO2, while the second proceeds via the reaction of AAL (acetaldehyde) into COL and later to CO2, and the third involves the formation of AA (acetic acid) from adsorbed acetate that may be produced from AAL. Such mechanism promoted the EOR at more negative potentials at the alloys, also delivering higher current densities, relative to Pt/C. Thus, the inclusion of Sn in the Pt structure enhanced the catalytic activity for the EOR in acidic media.

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Section: Introductionmentioning

confidence: 99%

Performance and In‐Situ FTIR Evaluation of Pt−Sn/C Electrocatalysts with Several Pt : Sn Atomic Ratios for the Ethanol Oxidation Reaction in Acidic Media

González-Quijano

Pech-Rodríguez²,

González-Quijano

et al. 2018

ChemElectroChem

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“…[1][2][3][4] In aD EFC,c atalysts for the ethanol oxidation reaction (EOR) essentially determine the performance and overall cost of the DEFC.S tate of the art electrocatalysts consist of carbon supported Pt (Pt/C) because metallic Pt is very active in CÀCb ond cleavage in the EOR. [1][2][3][4] In aD EFC,c atalysts for the ethanol oxidation reaction (EOR) essentially determine the performance and overall cost of the DEFC.S tate of the art electrocatalysts consist of carbon supported Pt (Pt/C) because metallic Pt is very active in CÀCb ond cleavage in the EOR.…”

mentioning

confidence: 99%

Microfluidic Synthesis Enables Dense and Uniform Loading of Surfactant‐Free PtSn Nanocrystals on Carbon Supports for Enhanced Ethanol Oxidation

Zhang

Peng

et al. 2016

Angewandte Chemie

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Developing new synthetic methods for carbon supported catalysts with improved performance is of fundamental importance in advancing proton exchange membrane fuel cell (PEMFC) technology.C ontinuous-flow, microfluidic reactions in capillary tube reactors are described, whicha re capable of synthesizing surfactant-free,u ltrafine PtSn alloyed nanoparticles (NPs) on various carbon supports (for example, commercial carbon black particles,c arbon nanotubes,a nd graphene sheets). The PtSn NPs are highly crystalline with sizes smaller than 2nm, and they are highly dispersed on the carbon supports with high loadings up to 33 wt %. These characteristics make the as-synthesized carbon-supported PtSn NPs more efficient than state of the art commercial Pt/C catalysts applied to the ethanol oxidation reaction (EOR). Significantly enhanced mass catalytic activity (two-times that of Pt/C) and improved stability are obtained.

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“…Sn-based catalysts are the best ones for the oxidation of ethanol[14,[28][29][30][87][88][89][90][91][92]. We have investigated the role of Sn in this reaction[5,16,21,26,27,44,77,93] and our results have shown that Sn exhibits efficient and enhanced electrocatalytic ability toward ethanol.…”

mentioning

confidence: 82%

Addition of iron oxide to Pt-based catalyst to enhance the catalytic activity of ethanol electrooxidation

Almeida

Garbim

Silva

et al. 2017

Journal of Electroanalytical Chemistry

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Carbon monoxide and ethanol oxidation on PtSn supported catalysts: Effect of the nature of the carbon support and Pt:Sn composition

Cited by 68 publications

References 60 publications

Performance and In‐Situ FTIR Evaluation of Pt−Sn/C Electrocatalysts with Several Pt : Sn Atomic Ratios for the Ethanol Oxidation Reaction in Acidic Media

Performance and In‐Situ FTIR Evaluation of Pt−Sn/C Electrocatalysts with Several Pt : Sn Atomic Ratios for the Ethanol Oxidation Reaction in Acidic Media

Microfluidic Synthesis Enables Dense and Uniform Loading of Surfactant‐Free PtSn Nanocrystals on Carbon Supports for Enhanced Ethanol Oxidation

Addition of iron oxide to Pt-based catalyst to enhance the catalytic activity of ethanol electrooxidation

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