Synthesis and characterization of Pt, Pt–Fe/TiO2 cathode catalysts and its evaluation in microbial fuel cell

Abstract

In this present study TiO 2 supported metal catalysts (Pt/TiO 2 , Pt-Fe/TiO 2 ) were prepared by liquid phase photo deposition method. The prepared catalysts were characterized electrochemically. X-ray Diffractometer (XRD) results showed the presence of metal particle deposition on TiO 2 . HR-SEM and TEM results confirmed the nano size of the metal particles and their uniform dispersion on the surface of TiO 2 . Electrochemical methods such as cyclic Voltammetry, linear sweep Voltammetry were used to study the stability and oxygen reduction properties of the synthesized TiO 2 supported metal catalysts. The prepared catalysts were tested in Single Chamber Microbial Fuel Cell (SCMFC) with Escherichia coli of type DH5-a as bacterium. The power densities of Pt/TiO 2 and Pt-Fe/TiO 2 (110.5 and 136.8 mW/m 2 ) were found to be higher compared to that of Pt/C (77 mW/m 2 ) in MFC operation. The results visualized the better electro catalytic property for oxygen reduction in cathodic part of microbial fuel cell.

Optimization of soil microbial fuel cell for sustainable bio-electricity production: combined effects of electrode material, electrode spacing, and substrate feeding frequency on power generation and microbial community diversity

“…One such promising MFC is soil (S-MFC) with high potential for real-world applications [ 4 , 5 ]. However, their low energy production rate and performance instability limit their application [ 6 ] in the real world. Therefore, optimization (both architectural and biological) is required to achieve optimal S-MFC system performance for direct practical applications.…”

Photocatalytic transfer hydrogenolysis of aryl ethers

“…Although the CV curve began with the anodic sweep, a small amount of hydrogen atoms was adsorbed at the negative potential and then rapidly desorbed at the positive potential. 72–74 It can be observed that the current for EC hydrogen desorption is the lowest on Pt/P25 under dark conditions. Then, all catalysts were irradiated for 5 min to perform PC hydrogen adsorption and then were analyzed via CV.…”

Enhanced Electrocatalytic Activity of Cobalt-Doped Ceria Embedded on Nitrogen, Sulfur-Doped Reduced Graphene Oxide as an Electrocatalyst for Oxygen Reduction Reaction

“…Metal oxides such as CeO 2 [6][7][8][9], MnO 2 [10][11][12], TiO 2 [13,14] and ZnO [15] have been used as alternatives for the Pt-based electrocatalyst for the ORR. Metal oxides act as promoters during the ORR due to their facile oxygen release and storage capacity, as well as their well-known corrosion resistance [16,17].…”