The role of anions in oxygen reduction in neutral and basic media on gold single-crystal electrodes

Prieto, Ana L.; Hernández, Javier; Herrero, Enrique; Feliu, Juan M.

doi:10.1007/s10008-003-0362-3

Cited by 62 publications

(88 citation statements)

References 22 publications

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“…The voltammetric response of monocrystal surfaces was found to depend somewhat on crystallographic orientation [39,40], although this dependence is notably less expressed in comparison to platinum monocrystals [41].…”

Section: Real Surface Area Determinationmentioning

confidence: 99%

Oxygen reduction reaction on spontaneously and potentiodynamically formed Au/TiO2 composite surfaces

Jašin

Abu-Rabi

Mentus³

et al. 2007

Electrochimica Acta

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Section: Real Surface Area Determinationmentioning

confidence: 99%

Oxygen reduction reaction on spontaneously and potentiodynamically formed Au/TiO2 composite surfaces

Jašin

Abu-Rabi

Mentus³

et al. 2007

Electrochimica Acta

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“…[25] The higher ORR activity on Au(100) has also been shown using the impinging jet system. [26] The fact that the ORR activity of Au electrodes depends on the crystallographic orientation suggests a route to synthesise active catalysts by preparing AuNPs with certain shapes, namely nanocubes, as these have preferential (100) facets. [9][10][11][12]27] In comparison with Au nanospheres or nanorods, nanocubes have shown much higher electrocatalytic activity towards the ORR.…”

Section: Introductionmentioning

confidence: 99%

Shape‐Dependent Electrocatalysis: Oxygen Reduction on Carbon‐Supported Gold Nanoparticles

et al. 2014

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Cubic, octahedral and quasi‐spherical (two different particle sizes) Au nanoparticles are synthesised and dispersed in a carbon‐black powder. The size and morphology of the Au nanocatalysts is confirmed by transmission electron microscopy and X‐ray diffraction. Au nanospheres are approximately 5 and 30 nm in diameter, whereas the size of Au octahedra and nanocubes is approximately 40–45 nm. The electrocatalytic activity of these carbon‐supported particles towards the oxygen reduction reaction (ORR) is studied in 0.5 M H2SO4 and 0.1 M KOH solutions by using the rotating‐disk‐electrode method. The specific activity (SA) for O2 reduction is measured, and the highest SA is observed for Au nanocubes supported on carbon. The highest mass activities are found for the smallest Au nanoparticles. Tafel analysis suggests that the mechanism of the ORR on shape‐controlled Au/C catalysts is the same as on bulk Au.

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“…In particular, OH -anions, specifically adsorbed on the single crystal electrode surface, were found to play a key role in increasing electrocatalytic activity in alkaline media. Fundamental studies on this area have revealed the orientation dependency on the kinetics and mechanism of oxygen reduction and the best activity was obtained with an Au(100) crystal electrode where a four-electron reduction of molecular oxygen to water occurred in pH [6.0 media [1,[8][9][10][11][12][13][14]. On the other hand, a surface modification is required to improve electrocatalytic activity of Au(111) crystal electrode where two-electron reduction takes place otherwise [15,16].…”

Section: Introductionmentioning

confidence: 99%

Electrocatalytic Reduction of Oxygen on a Pd Ad-Layer Modified Au(111) Electrode in Alkaline Solution

et al. 2009

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Oxygen reduction was studied on palladium, cadmium and zinc ad-atom modified single crystal Au (111) electrodes. The electrodes were modified by underpotential deposition process and their activity towards oxygen reduction was studied in alkaline media by voltammetry. The reduction peaks obtained were compared with those of bare Au (111), Pd disc and bulk deposited Cd electrodes. Enhanced catalytic activity of the Au(111) electrode in the presence of Pd, Cd and Zn ad-layer can be attributed to a change in surface charge and energy by ad-layer formation. In oxygen saturated medium a well defined sharp reduction peak was observed at -0.12 V for 1/5 ML Pd ad atom modified Au(111) electrode while it was positioned at -0.18 V on a Pd disk electrode. The best shift in reduction peak potential was obtained with 2/5 ML Pd ad atom modified Au(111) electrode with similar current density of Pd disc electrode.

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The role of anions in oxygen reduction in neutral and basic media on gold single-crystal electrodes

Cited by 62 publications

References 22 publications

Oxygen reduction reaction on spontaneously and potentiodynamically formed Au/TiO2 composite surfaces

Oxygen reduction reaction on spontaneously and potentiodynamically formed Au/TiO2 composite surfaces

Shape‐Dependent Electrocatalysis: Oxygen Reduction on Carbon‐Supported Gold Nanoparticles

Electrocatalytic Reduction of Oxygen on a Pd Ad-Layer Modified Au(111) Electrode in Alkaline Solution

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