Abstract
The electrocatalytic activity of mixed Ru‐Ir oxide electrodes fabricated by thermal decomposition are compared (using cyclic voltammetry and potentiodynamic technique), for their ability to evolve hydrogen and oxygen in both and solutions. Cyclic voltammetry provides information about the redox transitions of surface oxyruthenium and oxyiridium groups, and also generates an effective index, (voltammetric charge ), which can be used to determine the electrocatalytic activity of the electrode. In this study, (obtained by numerical integration from CV), indicates that maximum activity results from a coating solution with 60 to 80 mol % Ir content. It is noted that, for acidic solutions, voltammetric charge in the region of hydrogen adsorption/desorption, , exhibits the same trends as . The potentiodynamic technique, on the other hand, is employed to yield Tafel plots providing vs. E relations. It is found that the activity of is worst for oxygen evolution in alkaline solutions, while its electrochemical behavior for hydrogen evolution is the same for both acidic and basic solutions. In contrast, it is found that the electrochemical behavior of for hydrogen evolution is significantly influenced by pH.
Keywords
Tafel equationCyclic voltammetryOxygen evolutionInorganic chemistryElectrochemistryChemistryHydrogenOxideVoltammetryOxygenElectrocatalystThermal decompositionRedoxElectrodePhysical chemistryOrganic chemistry
Affiliated Institutions
Related Publications
Effect of Coprecipitated Metal Ions on the Electrochemistry of Nickel Hydroxide Thin Films: Cyclic Voltammetry in 1M KOH
Binary 9:1 composite hydroxides of nickel with 13 other metals were prepared by cathodic electrocoprecipitation from metal nitrate solutions and characterized by cyclic voltamme...
Voltammetric Characterization of Ruthenium Oxide-Based Aerogels and Other RuO<sub>2</sub>Solids: The Nature of Capacitance in Nanostructured Materials
Ruthenium dioxide is an important electrode material for applications in electrocatalysis and power sources. High surface areas are achieved in hydrous RuO2 precipitates and in ...
Nickel based electrocatalysts for oxygen evolution in high current density, alkaline water electrolysers
A number of nickel based materials are investigated as potential oxygen evolution catalysts under conditions close to those met in modern, high current density alkaline water el...
Benchmarking Heterogeneous Electrocatalysts for the Oxygen Evolution Reaction
Objective evaluation of the activity of electrocatalysts for water oxidation is of fundamental importance for the development of promising energy conversion technologies includi...
<i>Operando</i> Identification of the Dynamic Behavior of Oxygen Vacancy-Rich Co<sub>3</sub>O<sub>4</sub> for Oxygen Evolution Reaction
The exact role of a defect structure on transition metal compounds for electrocatalytic oxygen evolution reaction (OER), which is a very dynamic process, remains unclear. Studyi...
Publication Info
- Year
- 1992
- Type
- article
- Volume
- 139
- Issue
- 8
- Pages
- 2158-2163
- Citations
- 174
- Access
- Closed
External Links
Social Impact
Altmetric
PlumX Metrics
Social media, news, blog, policy document mentions
Citation Metrics
174
OpenAlex
Cite This
Ten‐Chin Wen,
Chi‐Chang Hu
(1992).
Hydrogen and Oxygen Evolutions on Ru‐Ir Binary Oxides.
Journal of The Electrochemical Society
, 139
(8)
, 2158-2163.
https://doi.org/10.1149/1.2221195
Identifiers
- DOI
- 10.1149/1.2221195