A study of aldehyde oxidation at glassy carbon, mercury, copper, silver, gold and nickel anodes

Effen, Richard M. Van; Evans, Dennis H.

doi:10.1016/s0022-0728(79)80362-9

Cited by 72 publications

(33 citation statements)

References 18 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Similar CV behaviour has been observed with copper electrodes and various other copper containing CMEs in alkaline solutions [55-581. Both Cu( II) and Cu( III) have been suggested to act as an electron transfer mediator for the oxidation of aldehyde groups [59]. However, since the oxidation of carbohydrates occurs at or near the oxidation wave of the Cu(III)/Cu(II) redox couple, although the actual mechanism of glucose oxidation remains uncer- Scan rate: 50 mV s-l. Table 2 Cyclic voltammetric oxidation of hydroquinone Solution: 10-j mol 1-r hydroquinone in 0.1 mol 1-l phosphate buffer (pH 7.0).…”

Section: Oxidation Of Glucose On Cuo Modified CCCmentioning

confidence: 99%

Electrochemical characteristics of conductive carbon cement as matrix for chemically modified electrodes

Huang

Pot

Kok

1995

Analytica Chimica Acta

View full text Add to dashboard Cite

Electrochemical characteristics of conductive carbon cement as matrix for chemically modified electrodes Huang, X.; Pot, J.J.; Kok, W.T. General rightsIt is not permitted to download or to forward/distribute the text or part of it without the consent of the author(s) and/or copyright holder(s), other than for strictly personal, individual use, unless the work is under an open content license (like Creative Commons). Disclaimer/Complaints regulationsIf you believe that digital publication of certain material infringes any of your rights or (privacy) interests, please let the Library know, stating your reasons. In case of a legitimate complaint, the Library will make the material inaccessible and/or remove it from the website. Please Ask the Library: http://uba.uva.nl/en/contact, or a letter to: Library of the University of Amsterdam, Secretariat, Singel 425, 1012 WP Amsterdam, The Netherlands. You will be contacted as soon as possible. AbstractConductive carbon cement (CCC) was evaluated as matrix material for the preparation of electrodes bulk-modified with electrocatalysts. For pure CCC electrodes the background current characteristics were examined. In acidic or neutral phosphate buffers the useful electrode potential range was from -0.3 to + 1.0 V vs. SCE, while in 0.1 mol l-' NaOH it was from -0.3 to + 0.7 V. The electrochemical reversibility of CCC electrodes was examined by measuring the standard rate constants for the reduction of hexacyanoferrate( III) and the oxidation of hydroquinone, using cyclic voltammetry (CV) and rotating disk experiments. The reversibility of a CCC electrode was comparable with that of a freshly polished glassy carbon electrode and better than that of carbon paste electrodes. CCC was used as matrix for the preparation of electrodes bulk-modified with cuprous oxide and cobalt phthalocyanine (CoPC). With a C&O-CCC electrode the oxidation potential of glucose, which shows sluggish kinetics at unmodified carbon electrodes, was strongly reduced. The kinetics of the mediated glucose oxidation has been studied with a rotating disk electrode. It was shown that at glucose concentrations higher than approximately 1 mmol 1-l the electrochemical regeneration of the catalyst becomes rate-determining. The Cu@-CCC modified electrode has been applied with a constant potential in flow-injection analysis for the determination of glucose. The long-term stability of the electrode was studied; repeated injections of a glucose solution during a period of 6 h yielded a relative standard deviation of the peak height of 1.8% (n = 57). In CV experiments the electrocatalytic activity of CoPC was shown for the oxidation of various compounds such as penicillamine, hydrazine and bile acids. Application of the CoPC-CCC electrode for the detection of bile acids in flow-through detection with a constant or pulsed potential failed, due to a rapid deactivation of the electrode.

show abstract

Section: Oxidation Of Glucose On Cuo Modified CCCmentioning

confidence: 99%

Electrochemical characteristics of conductive carbon cement as matrix for chemically modified electrodes

Huang

Pot

Kok

1995

Analytica Chimica Acta

View full text Add to dashboard Cite

show abstract

“…[35][36][37][38][39][40] Thus, we proposed that a faster reaction rate of electrocatalytic aldehyde oxidation reaction (ADOR) can contribute to the acceleration of AOR, leading to a higher electricity output in DAFCs. In study of electrocatalytic ADOR, previous researchers have successfully used bulk metal anodes [41], Au nanoparticles [42], and Pd nanoparticles supported on carbon nanotubes (Pd/CNT) [43] for formaldehyde (C 1 7 aldehyde) oxidation reaction. However, because C 2+ alcohols have other C 2+ aldehydes as AOR reaction intermediates, activities of different supported nanoparticles with respect to various aldehydes must still be compared to discover an active site facilitating AOR by accelerating ADOR for high-performance DAFCs fed with fuels such as methanol, ethanol, ethylene glycol and glycerol.…”

Section: Introductionmentioning

confidence: 99%

PdAg/CNT catalyzed alcohol oxidation reaction for high-performance anion exchange membrane direct alcohol fuel cell (alcohol = methanol, ethanol, ethylene glycol and glycerol)

Benipal

Liang

et al. 2016

Applied Catalysis B: Environmental

162

View full text Add to dashboard Cite

2 3 1.PdAg/CNT with 2.7 nm average particle size is prepared without using surfactants. 2.Ag outperforms Pt, Pd, and Au towards electrocatalytic aldehyde oxidation. 3.PdAg/CNT has high activity towards electrocatalytic alcohol oxidation. 4.PdAg/CNT was used as a highly active anode catalyst for direct alcohol fuel cells. 5.PdAg/CNT cleaves C-C bond of glycerol more effectively than Pd/CNT. 4 ABSTRACTSPdAg supported on carbon nanotubes (PdAg/CNT) with an average particle size of 2.7 nm is prepared by an aqueous phase reduction method for alcohol oxidation reaction in direct alcohol fuel cells. In a half-cell system with three electrodes, the peak mass activity of PdAg/CNT reaches 0.105 mA µg Pd -1 , 0.305 mA µg Pd -1 , 2.105 mA µg Pd -1 , and 8.53 mA µg Pd -1 for methanol oxidation reaction, ethanol oxidation reaction, ethylene glycol oxidation reaction, and glycerol oxidation reaction, respectively, in 1 M KOH 0.1 M alcohol electrolyte. These values are higher than the mass activity of Pd/CNT at the same applied potential. With PdAg/CNT (0.5 mg Pd per MEA -1 ) as an anode catalyst, a direct methanol fuel cell, a direct ethanol fuel cell, a direct ethylene glycol fuel cell and a direct glycerol fuel cell achieve peak power densities of 135.1 mW cm -2 , 202.3 mW cm -2 , 245.2 mW cm -2 , and 276.2 mW cm -2 , with corresponding peak mass activities of 270.2 mW mg Pd per MEA -1 , 404.6 mW mg Pd per MEA -1 , 490.4 mW mg Pd per MEA -1 , and 552.4 mW mg Pd per MEA -1 , respectively, at 80 °C and ambient pressure. Ag has shown excellent activity towards aldehyde (formaldehyde, acetaldehyde, and glyoxylate) oxidation, thus, the enhancement in alcohol oxidation on PdAg/CNT is proposed due to Ag's promotion of intermediate aldehyde oxidation. PdAg/CNT also improves the fuel efficiency of glycerol oxidation by contributing to the C-C bond cleavage of C 3 glycerol to C 2 oxalate.5

show abstract

“…As the monosaccharides contain aldehyde, primary and secondary hydroxyl groups, the electro-reactivity of all these functional groups may play an important role during the whole oxidation process. The oxidation of aldehydes as well as the oxidation of monohydric and polyhydric alcohols on gold electrode in alkaline medium has been widely investigated [2][3][4][5][6][7][8][9]. Ristic et al [3] studied some simple (formaldehyde, acetaldehyde), and some specific (cinnamaldehyde, crotonaldehyde, furfural and benzaldehyde) aldehydes.…”

Section: Introductionmentioning

confidence: 99%

Electrocatalytic oxidation of monosaccharides on gold electrode in alkaline medium: Structure–reactivity relationship

Parpot

Nunes

Bettencourt

2006

Journal of Electroanalytical Chemistry

View full text Add to dashboard Cite

A study of aldehyde oxidation at glassy carbon, mercury, copper, silver, gold and nickel anodes

Cited by 72 publications

References 18 publications

Electrochemical characteristics of conductive carbon cement as matrix for chemically modified electrodes

Electrochemical characteristics of conductive carbon cement as matrix for chemically modified electrodes

PdAg/CNT catalyzed alcohol oxidation reaction for high-performance anion exchange membrane direct alcohol fuel cell (alcohol = methanol, ethanol, ethylene glycol and glycerol)

Electrocatalytic oxidation of monosaccharides on gold electrode in alkaline medium: Structure–reactivity relationship

Contact Info

Product

Resources

About