Electrochemical Impedance Spectroscopy of Metal Oxide Electrodes for Energy Applications

2020 ◽  
Vol 3 (1) ◽  
pp. 66-98 ◽  
Author(s):  
Alexandria R. C. Bredar ◽  
Amanda L. Chown ◽  
Andricus R. Burton ◽  
Byron H. Farnum
Keyword(s):  
Electrochemical Impedance Spectroscopy ◽  
Impedance Spectroscopy ◽  
Metal Oxide ◽  
Electrochemical Impedance ◽  
Energy Applications ◽  
Oxide Electrodes

Evaluation of Electrochemical Properties of Nanostructured Metal Oxide Electrodes Immersed in Redox-Inactive Organic Media

2021 ◽  
Author(s):  
David A. Brewster ◽  
Melissa D. Koch ◽  
Kathryn E Knowles
Keyword(s):  
Electrochemical Impedance Spectroscopy ◽  
Metal Oxide ◽  
Electrochemical Impedance ◽  
Electrolyte Solutions ◽  
Organic Media ◽  
Oxide Semiconductors ◽  
Oxide Electrodes ◽  
Electrochemically Deposited ◽  
Deposited Films ◽  
Nanostructured Metal

This paper describes analysis of dropcast nanocrystalline and electrochemically deposited films of NiO and α-Fe2O3 as model metal oxide semiconductors immersed in redox-inactive organic electrolyte solutions using electrochemical impedance spectroscopy...

scholarly journals Fabrication of Metal (Cu and Cr) Incorporated Nickel Oxide Films for Electrochemical Oxidation of Methanol

Crystals ◽  
2021 ◽  
Vol 11 (11) ◽  
pp. 1398
Author(s):  
Rimsha Liaqat ◽  
Muhammad Adil Mansoor ◽  
Javed Iqbal ◽  
Asim Jilani ◽  
Sehar Shakir ◽  
...  
Keyword(s):  
Thin Films ◽  
Catalytic Activity ◽  
Electrochemical Impedance Spectroscopy ◽  
Impedance Spectroscopy ◽  
Metal Oxide ◽  
Electrochemical Impedance ◽  
Mixed Metal Oxide ◽  
Metal Oxide Thin Films ◽  
X Ray ◽  
Oxidation Of Methanol

Methanol electrochemical oxidation in a direct methanol fuel cell (DMFC) is considered to be an efficient pathway for generating renewable energy with low pollutant emissions. NiO−CuO and Ni0.95Cr0.05O2+δ thin films were synthesized using a simple dip-coating method and tested for the electro-oxidation of methanol. These synthesized electrocatalysts were characterized by X-ray diffraction spectroscopy (XRD), X-ray photoelectron spectroscopy (XPS), Scanning electron microscopy (SEM), Energy-dispersive X-ray spectroscopy (EDS), and Raman spectroscopy. Different electrochemical techniques were used to investigate the catalytic activity of these prepared electrocatalysts for methanol oxidation, including linear sweep voltammetry (LSV), electrochemical impedance spectroscopy (EIS), and chronoamperometry (CA). In the presence of 0.3 M methanol, the current densities of NiO−CuO and Ni0.95Cr0.05O2+δ thin films were found to be 12.2 mA·cm−2 and 6.5 mA·cm−2, respectively. The enhanced catalytic activity of NiO−CuO and Ni0.95Cr0.05O2+δ thin films may be a result of the synergistic effect between different metal oxides. The Chronoamperometry (CA) results of the mixed metal oxide thin films confirmed their stability in basic media. Furthermore, the findings of electrochemical impedance spectroscopy (EIS) of mixed metal oxide thin films demonstrated a lower charge transfer resistance as compared to the pure NiO, CuO, and Cr2O3 thin films.

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