Highly porous Ti–Ni anodes for electrochemical oxidations. Issue 8 (8th June 2020)

• Record Type: Journal Article
• Authors: Guenani, Nihal; Barawi, Mariam; Villar-García, Ignacio J.; Bisquert, Juan; de la Peña O'Shea, Víctor A.; Guerrero, Antonio
• Is Part Of: Sustainable energy & fuels. Volume 4:Issue 8(2020)
• Page Start: 4003
• Page End: 4007
• Publication Date: 2020-06-08
• Subjects: Renewable energy sources -- Periodicals; Fuel cells -- Periodicals; Electric batteries -- Periodicals; Electrochemistry -- Periodicals; 660.297
• DOI: 10.1039/d0se00242a
• Languages: English
• ISSNs: 2398-4902

Abstract

Abstract : Powder metallurgy enables the fabrication of scalable and efficient electrodes for oxidation reactions. Abstract : This work describes a general method to obtain highly porous electrodes and their use as dimensionally stable anodes for the O2 evolution reaction (OER). By using a powder metallurgy based process, where metallic titanium and nickel powders are pressed and thermally treated to form "brown compacts", we obtain electrodes that benefit from a 1000-fold increase in the electrochemical surface area (ECSA). In addition, active catalytic species for water oxidation ( i.e. NiOOH) are generated during the processing converting these electrodes as ideal candidates for evaluation in oxidation reactions. Excellent OER performance is obtained with overpotentials below 270 mV at 10 mA cm −2, exceeding those of commercially available alternatives. The current work paves the way for a generic method that will be extended to other electrochemical reactions.