TY - JOUR
T1 - Electrochemical Oxygen Evolution Reaction Catalyzed by Cobalt Oxide (Co3O4) Nanodisks
AU - Umar, A
AU - Qamar, Mohamad Shamsuddin
AU - Kumar, R
AU - Ibrahim, AA
AU - Alhmami, MAM
AU - Almas, T
AU - Mohammed, AYA
AU - Bouropoulos, N
AU - Baskoutas, S
AU - Suliman, MH
AU - Drmosh, Qasem Ahmed Qasem
PY - 2020
Y1 - 2020
N2 - In this work, multidimensional Co3O4 nanodisks were synthesized through a simple solution method and characterized through various techniques for their morphological, structural, compositional and crystalline properties. The electro-catalytical oxygen evolution characteristics of the Co3O4 nanodisks were analyzed from the water-splitting process. The Co3O4 nanodisks exhibited high oxygen evolution reaction (OER) activity with a low Tafel slope of 115.3 mV dec(-1). The onset potential was measured to be 300 mV, while the overpotential to generate 10 mA cm(-2) current density was determined to be 345 mV. Double-layer capacitance calculated from cyclic voltammograms recorded in the range 1.00-1.12 V-RHE was estimated to be 4.1 mF cm(-2) and was twice the value of the electrochemically active surface area. The excellent OER features of the Co3O4 nanodisks were attributed to the highly perforated nanodisks morphology which provided a large specific surface area for the electro-catalytic decomposition of water to release O-2 gas.
AB - In this work, multidimensional Co3O4 nanodisks were synthesized through a simple solution method and characterized through various techniques for their morphological, structural, compositional and crystalline properties. The electro-catalytical oxygen evolution characteristics of the Co3O4 nanodisks were analyzed from the water-splitting process. The Co3O4 nanodisks exhibited high oxygen evolution reaction (OER) activity with a low Tafel slope of 115.3 mV dec(-1). The onset potential was measured to be 300 mV, while the overpotential to generate 10 mA cm(-2) current density was determined to be 345 mV. Double-layer capacitance calculated from cyclic voltammograms recorded in the range 1.00-1.12 V-RHE was estimated to be 4.1 mF cm(-2) and was twice the value of the electrochemically active surface area. The excellent OER features of the Co3O4 nanodisks were attributed to the highly perforated nanodisks morphology which provided a large specific surface area for the electro-catalytic decomposition of water to release O-2 gas.
M3 - Article
SN - 1947-2935
JO - Science of Advanced Materials
JF - Science of Advanced Materials
ER -