Electrocatalytic and pseudocapacitive properties of cobalt (hydro)oxide films on sintered metal fiber filter

Materials for Renewable and Sustainable Energy

Eugenijus Valatka¹  Ieva Barauskienė¹ 

[1] Department of Physical and Inorganic Chemistry, Kaunas University of Technology;

关键词: Cobalt hydroxide;    Oxygen evolution reaction;    Electroactive surface area;    Metal fiber filters;    Specific capacitance;   

DOI  :  10.1007/s40243-017-0108-2

来源: DOAJ

【 摘 要 】

Abstract Cobalt (hydro)oxide films on Bekipor ST 20AL3 sintered metal fiber were formed by electrochemical deposition under galvanostatic conditions using different electrolyte baths (nitrate, acetate and chloride). Cobalt oxide films were prepared via thermal treatment of as-deposited specimens at 673 K. Electroactive surface area of as-deposited and annealed films was estimated using oxidation–reduction system containing ferricyanide/ferrocyanide. Electrocatalytic and pseudocapacitive properties of the prepared films were investigated using 0.1 M NaOH aqueous solutions. The maximum specific capacitance of 1324 F g−1 was observed for α-Co(OH)2 films electrodeposited from nitrate-containing electrolyte. Similarly, the highest electrocatalytic activity and stability in oxygen evolution reaction (OER) was determined to be characteristic for Co3O4 films derived from nitrate bath.

【 授权许可】

Unknown