Preparation of highly dispersed Pt + Ru alloy clusters and the activity for the electrooxidation of methanol

Watanabe, Masahiro; Uchida, Makoto; Motoo, Satoshi

doi:10.1016/0022-0728(87)85156-2

Cited by 604 publications

(368 citation statements)

References 17 publications

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“…Binary PtRu/C is a promising anode catalyst for use in the direct-methanol fuel cell (DMFC) [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18].…”

Section: Introductionmentioning

confidence: 99%

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Kinetics of CH3OH oxidation on PtRu/C studied by impedance and CO stripping voltammetry

Sugimoto

Aoyama

Kawaguchi

et al. 2005

Journal of Electroanalytical Chemistry

113

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The kinetics of the CH 3 OH oxidation reaction at 60°C on well-alloyed platinum-ruthenium supported on carbon (Pt 50 Ru 50 /C) was studied by electrochemical impedance spectroscopy and compared with carbon-supported platinum (Pt/C). The reaction rate of the overall CH 3 OH oxidation increased with increasing electrode potential for both Pt/C and PtRu/C. In the case of Pt/C, when the electrode potential was E ≤ 450 mV vs. RHE only a capacitive behavior was observed. Resistive and pseudo-inductive behaviors were evident above 500 and 600 mV vs. RHE. In the case of PtRu/C, a similar change in behavior was observed, except that the behaviors

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“…Binary PtRu/C is a promising anode catalyst for use in the direct-methanol fuel cell (DMFC) [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18].…”

Section: Introductionmentioning

confidence: 99%

“…CH 3 OH + Pt → CO ad -Pt + 4H + + 4e - [1] CO ad -Pt + Pt + H 2 O → CO ad -Pt + OH ad -Pt + H + + e -→ 2Pt + CO 2 + 2H + + 2e - [2] The CO ad oxidation process (Eq. (2)) is postulated to be the rate-determining step.…”

Section: Introductionmentioning

confidence: 99%

Kinetics of CH3OH oxidation on PtRu/C studied by impedance and CO stripping voltammetry

Sugimoto

Aoyama

Kawaguchi

et al. 2005

Journal of Electroanalytical Chemistry

113

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“…During the past decade, platinum (Pt) clusters have been extensively studied [1][2][3] particularly as active catalysts for application in low-temperature fuel cell systems such PEMFC or PAFC (protonic exchange membrane and phosphoric acid fuel cells, respectively). Among them, supported [Pt 3 (CO) 6 ] n 2-clusters were soon recognized as very attractive materials.…”

Section: Introductionmentioning

confidence: 99%

Structural Characterization of Supported Platinum Carbonyl Clusters by X-ray Absorption Spectroscopy

et al. 2000

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The Chini-type Pt carbonyl clusters ([Pt 3 (CO) 6 ] n 2-, n ) 4, 5, 6) and other CO-stabilized Pt clusters were synthesized by γ-radiolysis, and their structures, when supported on carbon and R-alumina, were investigated by X-ray absorption spectroscopy (XAS). It was found that the stacking prismatic structure of triangular units in Chini clusters was transformed, when supported on carbon, into another structure in which the trimeric units are conserved but are now arranged in a planar monolayer. Some carbonyl groups remain to be ligated to Pt atoms under nitrogen atmosphere. However, on contact with the air, the carbonyl clusters are partially transformed into fcc Pt clusters. When supported on R-alumina, a more important structural evolution of supported clusters with a size growth is observed. Two groups of platinum clusters are obtained: the first one with a Pt-Pt distance corresponding to the intratriangular distance present in the Chini clusters, and the second one constituted of larger fcc clusters with a Pt-Pt distance close to the bulk one.

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“…Carbon supported platinum-ruthenium alloys (PtRu/C) are one of the most promising anode catalysts for direct methanol fuel cells (DMFCs) [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18]. The promotion effect has been mainly discussed based on the so-called "bi-functional effect" [19][20][21] or "ligand effect" [22] or a mixture of both.…”

Section: Introductionmentioning

confidence: 99%

Co-catalytic effect of nanostructured ruthenium oxide towards electro-oxidation of methanol and carbon monoxide

Sugimoto

Saida

Takasu

2006

Electrochemistry Communications

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Carbon supported platinum (Pt/C) modified with nanostructured ruthenium oxide was prepared and the activity towards the electro-oxidation of methanol and pre-adsorbed carbon monoxide was studied. Electrochemical studies at 60°C in 0.5 M H 2 SO 4 indicated that the addition of crystalline ruthenic acid nanosheets (HROns) as a co-catalyst to Pt/C promotes both methanol and carbon monoxide electro-oxidation. The increase in the activity of HROns modified Pt/C compared to Pt/C is suggested to be a result of the bi-functional characteristic of the surface of the oxide nanosheets.

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Preparation of highly dispersed Pt + Ru alloy clusters and the activity for the electrooxidation of methanol

Cited by 604 publications

References 17 publications

Kinetics of CH3OH oxidation on PtRu/C studied by impedance and CO stripping voltammetry

Kinetics of CH3OH oxidation on PtRu/C studied by impedance and CO stripping voltammetry

Structural Characterization of Supported Platinum Carbonyl Clusters by X-ray Absorption Spectroscopy

Co-catalytic effect of nanostructured ruthenium oxide towards electro-oxidation of methanol and carbon monoxide

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