Unsupported PtxRuyIrz and PtxIry as Bi-functional Catalyst for Oxygen Reduction and Oxygen Evolution Reactions in Acid Media, for Unitized Regenerative Fuel Cell

The effect of Ru on the activity of unsupported PtxRuyIrz material was analyzed in 0.5 M H2SO4 for O2+4H++4e- ⇆H2O reaction. PtxIrz, PtxRuyIrz Pt, Ir and Ru materials were prepared by chemical reduction. The electrocatalytic activity was evaluated by Linear Sweep Voltammetry, Rotating Disk Electrode...

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Bibliographic Details
Published inInternational journal of electrochemical science Vol. 8; no. 12; pp. 12692 - 12706
Main Authors Morales S, L., Fernández, A.M.
Format Journal Article
LanguageEnglish
Published Elsevier B.V 01.12.2013
Subjects
Bifunctional oxygen electrode
Electrocatalysts
Fuel Cell
Unitized Regenerative Fuel Cell (URFC)
Water Oxidation Reaction and Oxygen Reduction Reaction
Unitized Regenerative Fuel Cell (URFC)
Water Oxidation Reaction and Oxygen Reduction Reaction
Bifunctional oxygen electrode
Electrocatalysts
Fuel Cell
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ISSN1452-3981
1452-3981
DOI10.1016/S1452-3981(23)13299-8

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Summary:The effect of Ru on the activity of unsupported PtxRuyIrz material was analyzed in 0.5 M H2SO4 for O2+4H++4e- ⇆H2O reaction. PtxIrz, PtxRuyIrz Pt, Ir and Ru materials were prepared by chemical reduction. The electrocatalytic activity was evaluated by Linear Sweep Voltammetry, Rotating Disk Electrode and Cyclic Voltammetry. PtxRuyIrz showed an improvement to ORR after potential for interest reaction was applied. Ruthenium electrochemical activity disappears when to subject to anodic potential. Catalytic materials had particle sizes of 5-10 nm. PtxRuyIrz alloy formation phases were observed by High Resolution Transmission Electron Microscopy. No evident electrochemical changes were observed to PtxIrz material at ORR.
ISSN:1452-3981
1452-3981
DOI:10.1016/S1452-3981(23)13299-8