Ab Initio Investigation of the Electrocatalytic Mechanism of Methanol Oxidation over Platinum Electrodes

2005 ◽  
Keyword(s):  
Ab Initio ◽  
Methanol Oxidation ◽  
Platinum Electrodes ◽  
Electrocatalytic Mechanism

scholarly journals The kinetics and mechanism of methanol oxidation on Pt and PtRu catalysts in alkaline and acid media

2007 ◽  
Vol 72 (7) ◽  
pp. 709-712 ◽  
Author(s):  
Jelena Lovic
Keyword(s):  
Single Crystals ◽  
Methanol Oxidation ◽  
Ruthenium Catalysts ◽  
Alkaline Media ◽  
Pt Catalyst ◽  
Platinum Electrodes ◽  
Acid Media ◽  
Rate Determining Step ◽  
Langmuir Hinshelwood Mechanism ◽  
Ptru Catalysts

The kinetic of methanol electrochemical oxidation for a series of platinum and platinum-ruthenium catalysts was investigated. A correlation between the beginning of OHad adsorption and methanol oxidation was demonstrated on Pt single crystals and Pt nanocatalyst. The activity of the nano-structured Pt catalyst was compared with single crystal platinum electrodes assuming the Kinoshita model of nanoparticles. The ruthenium-containing catalysts shifted the onset of methanol oxidation to more negative potentials. The effect was more pronounced in acid than in alkaline media. Based on the established diagnostic criteria, the reaction between COad and OHad species according to the Langmuir-Hinshelwood mechanism was proposed as the rate determining step in alkaline and acid media on Pt and PtRu catalysts. .

Methanol oxidation at platinum electrodes in alkaline solution: comparison between supported catalysts and model systems

2004 ◽  
Vol 572 (1) ◽  
pp. 119-128 ◽  
Author(s):  
Amalija V. Tripković ◽  
K.Dj. Popović ◽  
J.D. Lović ◽  
V.M. Jovanović ◽  
A. Kowal
Keyword(s):  
Methanol Oxidation ◽  
Alkaline Solution ◽  
Supported Catalysts ◽  
Model Systems ◽  
Platinum Electrodes

scholarly journals Methanol oxidation at platinum electrodes in acid solution: Comparison between model and real catalysts

2006 ◽  
Vol 71 (12) ◽  
pp. 1333-1343 ◽  
Author(s):  
A.V. Tripkovic ◽  
S.LJ. Gojkovic ◽  
K.Dj. Popovic ◽  
J.D. Lovic
Keyword(s):  
Acid Solution ◽  
Methanol Oxidation ◽  
Specific Activity ◽  
High Surface ◽  
High Surface Area ◽  
Pt Catalyst ◽  
Platinum Electrodes ◽  
Hydroxyl Anion ◽  
Platinum Single Crystals ◽  
Supported Pt Catalyst

Methanol oxidation in acid solution was studied at platinum single crystals, Pt(hkl), as the model catalyst, and at nanostructural platinum supported on high surface area carbon, Pt/C, as the real catalyst. The linear extrapolation method was used to determine the beginning of hydroxyl anion adsorption. Structural sensitivity of the adsorption was proved and a correlation with the onset of the methanol oxidation current was established at all catalysts. Bisulfate and chloride anions were found to decrease the methanol oxidation rate, but probably did not influence the reaction parth. The specific activity for the reaction increased in the sequence Pt(110) <Pt/C < Pt(111), suggesting that the activity of the supported Pt catalyst can be correlated with the activities of the dominating crystal planes on its surface. .

Direct Methanol Oxidation on Platinum Electrodes with Ruthenium Adatoms in Hot Phosphoric Acid

1997 ◽  
Vol 144 (2) ◽  
pp. 423-428 ◽  
Author(s):  
Masahiro Watanabe ◽  
Yasuhiro Genjima ◽  
Kazunori Turumi
Keyword(s):  
Phosphoric Acid ◽  
Methanol Oxidation ◽  
Platinum Electrodes ◽  
Direct Methanol

Impedance study of methanol oxidation on platinum electrodes

2006 ◽  
Vol 51 (18) ◽  
pp. 3827-3840 ◽  
Author(s):  
Frode Seland ◽  
Reidar Tunold ◽  
David A. Harrington
Keyword(s):  
Methanol Oxidation ◽  
Platinum Electrodes ◽  
Impedance Study
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