The oxidation of small organic molecules

Parsons, Roger; VanderNoot, T.J.

doi:10.1016/0022-0728(88)87028-1

Cited by 1,220 publications

(676 citation statements)

References 173 publications

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“…Thus the kinetic results must be interpreted recognizing the limitations of the voltammetric technique for kinetic analysis and the difficulty of studying reactions that may be time de~endent. The latter is particularly important in the case of methanol oxidation, as it is usually postulated that methanol reactions on Pt surfaces proceed via two parallel pathways [22],…”

Section: Discussion 12mentioning

confidence: 99%

Electrochemical oxidation of methanol on tin-modified platinum single-crystal surfaces

Haner¹,

Ross²

1991

J. Phys. Chem.

124

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Section: Discussion 12mentioning

confidence: 99%

Electrochemical oxidation of methanol on tin-modified platinum single-crystal surfaces

Haner¹,

Ross²

1991

J. Phys. Chem.

124

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“…The main poisoning species has been identified in many studies to be surface-bonded carbon monoxide [37,38]. One of the early mechanistic issues has been whether the adsorbed carbon monoxide is an intermediate in the complete oxidation to CO 2 or a byproduct in an unwanted parallel reaction.…”

Section: Methanol Electrooxidation On Ptmentioning

confidence: 99%

“…One of the early mechanistic issues has been whether the adsorbed carbon monoxide is an intermediate in the complete oxidation to CO 2 or a byproduct in an unwanted parallel reaction. Currently, it is generally accepted that the electrochemical oxidation of methanol proceeds via a dual path mechanism, in which the decomposition of methanol to form CO ads is identified as the indirect pathway, while the reaction via soluble intermediates is often referred to as the direct pathway [37]. To investigate the structure sensitivity of the methanol oxidation dual pathway, an online electrochemical mass spectrometry (OLEMS) and voltammetric study has been performed on the electrochemical oxidation of methanol on the basal planes of Pt and several stepped Pt[n(111) · (111)] surfaces in both sulfuric and perchloric acid [40].…”

Section: Methanol Electrooxidation On Ptmentioning

confidence: 99%

Mechanisms of Carbon Monoxide and Methanol Oxidation at Single-crystal Electrodes

et al. 2007

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The electrochemical oxidation of carbon monoxide and methanol on single-crystal noble metal electrodes has been studied using cyclic voltammetry, chronoamperometry, in situ FTIR spectroscopy, online electrochemical mass spectrometry, and theoretical methods. The oxidation of CO was found to be enhanced by steps and defects. Furthermore, the surface diffusion rate was found to have a significant influence on the kinetics of the oxidation process: for high diffusion rates, such as the oxidation of CO on platinum, the kinetics can be described by a mean field model, while for low diffusion rates, such as CO oxidation on rhodium in sulfuric acid, a nucleationand-growth model was found to be more suitable. Voltammetric and mass spectrometric measurements on the oxidation of methanol on platinum indicate that steps enhance the overall reaction rate. In general, the selectivity towards the direct oxidation pathway through soluble intermediates was found to be higher in the absence of strongly adsorbing anions. In both perchloric and sulfuric acid, this selectivity was also found to increase with increasing step density. In sulfuric acid, Pt(111) shows the highest relative contribution for the direct pathway of all surfaces studied in that electrolyte. Based on these results, a detailed reaction scheme for the electrochemical oxidation of methanol is presented.

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“…In this way, traces of CO are present in hydrogen steams when being obtained by reforming hydrocarbons. Further, CO is an intermediate in the main or side paths in the oxidation mechanism of formic acid, methanol and ethanol [6,7]. Although our knowledge of the CO oxidation mechanism has improved over the last years, there are still many unsolved issues.…”

Section: Introductionmentioning

confidence: 99%

CO oxidation on stepped-Pt(111) under electrochemical conditions: insights from theory and experiment

Busó-Rogero

Herrero

Bandlow

et al. 2013

Phys. Chem. Chem. Phys.

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The co-adsorption of CO and OH on two Pt stepped surfaces vicinal to the (111) orientation has been evaluated by means of density functional theory (DFT) calculations. Focusing on Pt(533) and Pt(221), which contain (100) and (111)-steps, respectively, we find that (111)-steps are more reactive towards CO oxidation than surfaces containing (100)-steps. The DFT results are compared with electrochemical experiments on the CO adsorption and oxidation on these vicinal surfaces.

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The oxidation of small organic molecules

Cited by 1,220 publications

References 173 publications

Electrochemical oxidation of methanol on tin-modified platinum single-crystal surfaces

Electrochemical oxidation of methanol on tin-modified platinum single-crystal surfaces

Mechanisms of Carbon Monoxide and Methanol Oxidation at Single-crystal Electrodes

CO oxidation on stepped-Pt(111) under electrochemical conditions: insights from theory and experiment

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