Charge transfer in copper oxide nanostructure

Abstract

The deposition potential affects the structural, morphological, optical, and electrochemical impedance spectroscopy properties of cuprous oxide (Cu2O) thin films formed on copper (Cu) substrates adopting a three-electrode electrochemical deposition procedure. XRD data revealed that the deposited films have a cubic structure established with desired (111) growth orientation. Scanning electron microscopy (SEM) images reveal that Cu2O film has very well three-sided pyramid-shaped grains which are equally spread over the surface of the Cu substrates and change substantially when the plating potential is changed. The photo-current density of prepared Cu2O thin films was increased from -1.41×10-4 to -3.01×10-4 A/cm2 with increasing the deposition potential of -0.3 to -0.6V, respectively. Further, Cu2O thin films obtained at -0.6V have the minimum charge transfer resistance (Rct) than Cu2O thin films synthesized at -0.3 to -0.5V, suggesting that Cu2O thin films produced at -0.6V have the highest electron transfer efficiency.

BaRuO3 coated Ti plate as an efficient and stable electro-catalyst for water splitting reaction in alkaline medium

“…To reduce the cost without compromising the catalytic capabilities, attempt has been made to synthesize ruthenium (Ru) with other transition metal based oxides as electro-catalysts for HER and OER [ 6 , 14 ]. In literature, there are numerous techniques, such as solid-state method, hydrothermal method, sol-gel method and deposition method, available to synthesize various oxide materials and it was found that the synthetic method and the curing temperature have profound effect on the crystal growth and hence on their catalytic properties [ [22] , [23] , [24] , [25] , [26] , [27] , [28] , [29] , [30] , [31] , [32] , [33] ]. Recent report on the low cost synthesis of bimetallic oxides and its coatings over a metal surface shows the hard-corrosion resistance property [ 34 ].…”