Vulcan Carbon as Support for Sputtered Oxygen Evolution Electrocatalysts

Coertzen, De Wet; Kriek, R.J.; Levecque, Pieter; Falch, Anzel

doi:10.1007/s12678-019-00549-y

Cited by 1 publication

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“…None of the VC:Nafion support was therefore in direct contact with the alkaline electrolyte. 32 Overpotential.-LSV measurements were conducted before and after CP (Figs. 4a and 4b) to compare the improvement or decay of the electrocatalysts after short term stability testing.…”

Section: Resultsmentioning

confidence: 99%

“…28,30,31 In our previous work, different VC:Nafion ratios were investigated as a support to be used on GC and Au/SiO 2 as substrate and it was found that (i) the electrocatalyst surface area increased, and (ii) electrocatalyst delamination decreased during OER testing in alkaline media. 32 The technique used for preparing the wafer circuit (geometric area of a working electrode pad being 0.09 cm 2 ) and GC electrode disk insert surfaces (geometric area of 0.196 cm 2 ), before depositing the VC: Nafion ink, have been discussed in detail in a previous publication. 33 VC (XC-72R) was dried at 40 °C and then used to create a carbon ink with Nafion as the binding agent.…”

Section: Methodsmentioning

confidence: 99%

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Reactive Sputtered Ir_1−yNi_yO_xElectrocatalysts For The Oxygen Evolution Reaction in Alkaline Media

Coertzen¹,

Levecque²,

Jones³

et al. 2022

J. Electrochem. Soc.

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One drawback of alkaline water electrolysis is the sluggish oxygen evolution reaction kinetics at the anode of the electrolyser and improvement of the anode material is still a necessity. Various Ir1-yNiyOx electrocatalyst combinations were prepared by reactive sputtering and subjected to high-throughput electrochemical screening using a Au/SiO2 wafer. The best performing electrocatalysts were identified and subjected to single electrode electrochemical and physical characterisation using glassy carbon disk electrodes as the substrate. Rotating disk electrode analysis included linear sweep voltammetry before and after short term chronopotentiometry (CP). Energy dispersive X-ray spectroscopy and X-ray photo-electron spectroscopy confirmed the controlled synthesis of thin film electrocatalysts by utilising reactive sputtering, and confirmed Ir dissolution which occurred during CP measurements. Overall, the Ir1-yNiyOx electrocatalyst combinations containing higher amounts of Ir (Ir92Ni8Ox, Ir68Ni32Ox and Ir62Ni38Ox) performed the best of the evaluated mixed metal oxide electrocatalysts. However, evident from this study was that excellent mass-specific activity (current per mass of noble metal) was not exhibited by the mixed metal oxides when compared to Ni.

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Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Reactive Sputtered Ir_1−yNi_yO_xElectrocatalysts For The Oxygen Evolution Reaction in Alkaline Media

Coertzen¹,

Levecque²,

Jones³

et al. 2022

J. Electrochem. Soc.

Self Cite

View full text Add to dashboard Cite

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Vulcan Carbon as Support for Sputtered Oxygen Evolution Electrocatalysts

Cited by 1 publication

References 36 publications

Reactive Sputtered Ir_1−yNi_yO_xElectrocatalysts For The Oxygen Evolution Reaction in Alkaline Media

Reactive Sputtered Ir_1−yNi_yO_xElectrocatalysts For The Oxygen Evolution Reaction in Alkaline Media

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Vulcan Carbon as Support for Sputtered Oxygen Evolution Electrocatalysts

Cited by 1 publication

References 36 publications

Reactive Sputtered Ir1−yNiyOxElectrocatalysts For The Oxygen Evolution Reaction in Alkaline Media

Reactive Sputtered Ir1−yNiyOxElectrocatalysts For The Oxygen Evolution Reaction in Alkaline Media

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Reactive Sputtered Ir_1−yNi_yO_xElectrocatalysts For The Oxygen Evolution Reaction in Alkaline Media

Reactive Sputtered Ir_1−yNi_yO_xElectrocatalysts For The Oxygen Evolution Reaction in Alkaline Media