State of overpotential-deposited H species at electroplated platinum surfaces in comparison with bright platinum

Elam, M.; Conway, B. E.

doi:10.1007/bf01024367

Cited by 30 publications

(15 citation statements)

References 24 publications

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“…A well known reaction for which the reaction rate constant is independent of potential can be observed for the H 2 evolution reaction (her) [13,18,19]. One possible reaction mechanism suggested for the her is the 'catalytic pathway', as shown below for a particular electrode surface (S) [18,19]:…”

Section: Suggested Mechanism For the Anodic (Cooh)mentioning

confidence: 99%

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Anodic oxidation of oxalic acid using WOx based anodes

Bock

Smith

MacDougall

2002

Electrochimica Acta

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The electrochemical (COOH) 2 oxidation reaction was studied at high potentials (i.e. in the region where O 2 is evolved) in acidic, aqueous solutions using conductiveW O x based anodes. The WO x films used as anodes also contained Pt 'micro'-centers. Comparative oxidation studies were also carried out using antimony doped SnO 2 anodes. More rapid (COOH) 2 oxidation rates were observed for the WO x based anodes than for the antimony doped SnO 2 anodes. The (COOH) 2 oxidation reaction studied under the conditions used in this work was shown to be activation rather than mass transport controlled. The (COOH) 2 oxidation rate constant was found to be independent of the applied potential using the WO x based anodes. This likely suggests that a chemical reaction is involved in the (COOH) 2 oxidation reaction. This chemical reaction is also suggested to be the rate determining step in the (COOH) 2 to CO 2 oxidation reaction. Furthermore, it is believed that the (COOH) 2 oxidation reaction involves adsorptive interactions of this organic with the Pt/WO x anode surface. #

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Section: Suggested Mechanism For the Anodic (Cooh)mentioning

confidence: 99%

“…One possible reaction mechanism suggested for the her is the 'catalytic pathway', as shown below for a particular electrode surface (S) [18,19]:…”

Section: Suggested Mechanism For the Anodic (Cooh)mentioning

confidence: 99%

Anodic oxidation of oxalic acid using WOx based anodes

Bock

Smith

MacDougall

2002

Electrochimica Acta

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“…The KCl solution cannot support as many H þ ions as those from the H 2 SO 4 and HCl acidic solutions for the hydrogen evolution, which explains why the cyclic voltammogram from the N-DLC film electrode in the KCl solution has a larger negative portion. The introduction of Pt and Ru into the N-DLC film electrodes also results in an earlier hydrogen evolution in the KCl solution possibly according to the following steps [31]:…”

Section: Resultsmentioning

confidence: 99%

Effect of Platinum and Ruthenium Incorporation on Voltammetric Behavior of Nitrogen Doped Diamond‐Like Carbon Thin Films

Khun

Liu

2009

Electroanalysis

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Nitrogen doped diamond-like carbon thin films with or without platinum and ruthenium incorporation (N-DLC or PtRuN-DLC) were deposited on highly conductive p-Si substrates by DC magnetron sputtering to study the effect of Pt and Ru doping on the voltammetric performance of the N-DLC films. The potential windows of these film electrodes were measured in different electrolytic solutions, such as H 2 SO 4 , HCl and KCl. The cyclic voltammograms obtained from the N-DLC film electrodes in these solutions showed wide potential windows while the introduction of Pt and Ru into the film electrodes apparently narrowed down the potential windows due to their catalytic activities.

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“…In addition, hydrogen adsorption is also dependent on electrolyte composition (e.g., hydrogen adsorption is different in HClO 4 solution [21] and in H 2 SO 4 solution [22] ). The HER has been investigated by using different types of electrochemical equipment, such as rotating disc electrodes (RDE) [2,4,14,[22][23][24] and ultramicroelectrodes (UME), [21,25] and various electrochemical techniques . [13,[26][27][28][29][30] For instance, electrochemical impedance spectroscopy allows the charge-transfer resistance R CT and the double-layer capacitance C DL to be determined to characterise the adsorption process of hydrogen on the cathode surface.…”

Section: Introductionmentioning

confidence: 99%

Alternating Current Measurements in Scanning Electrochemical Microscopy, Part 2: Detection of Adsorbates

et al. 2011

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A scanning electrochemical microscope (SECM) in ac mode is used for the characterisation of the adsorption process during the hydrogen evolution reaction (HER) in sulfuric acid solution. It is shown that this technique allows quantitative analysis of the adsorption process, and measurements of the differential capacitance with the frequency as parameter are obtained. The time constant for relaxation of adsorbed hydrogen (H(ads)) is approximately 2 Hz, and analysis of the Nyquist plot allows direct evaluation of the charge involved. In addition, the direct comparison of the usual electrochemical impedance data and ac-SECM results obtained simultaneously permits characterisation of processes occurring at the surface and in solution.

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State of overpotential-deposited H species at electroplated platinum surfaces in comparison with bright platinum

Cited by 30 publications

References 24 publications

Anodic oxidation of oxalic acid using WOx based anodes

Anodic oxidation of oxalic acid using WOx based anodes

Effect of Platinum and Ruthenium Incorporation on Voltammetric Behavior of Nitrogen Doped Diamond‐Like Carbon Thin Films

Alternating Current Measurements in Scanning Electrochemical Microscopy, Part 2: Detection of Adsorbates

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