High performance robust F-doped tin oxide based oxygen evolution electro-catalysts for PEM based water electrolysis

Oxygen Electrochemistry as a Cornerstone for Sustainable Energy Conversion

“…Another very promising coating with remarkable activity and stability is Ta 2 O 5 /IrO 2 ,259 where the catalytically active component IrO 2 in a tetragonal rutile‐type structure is incorporated into a Ta 2 O 5 matrix. In such structures, the amount of active and expensive Ir can be reduced by the addition of Pd, Nb, etc, while still maintaining the original activity 260–262. Moreover, an increase in the activity can be achieved by mixing Ir with Ru 256.…”

Fluorine substituted (Mn,Ir)O2:F high performance solid solution oxygen evolution reaction electro-catalysts for PEM water electrolysis

“…overpotential and activity) to that of pure IrO 2 . 29,30 In addition to lowering the materials cost, a novel electro-catalyst offering lower operating electricity cost with signicantly improved electrochemical performance (lower overpotential and faster kinetics) with respect to IrO 2 needs to be identied in order to commercialize PEM water electrolysis technology. The focus of the current work is thus not only on the identication and development of novel electro-catalyst with reduced noble metal content but more importantly, identifying reduced noble metal containing systems that exhibit faster reaction kinetics, low overpotential, superior electrochemical performance than that of pure IrO 2 utilizing the prudent two pronged theoretical and experimental approach.…”

High performance and durable nanostructured TiN supported Pt50–Ru50 anode catalyst for direct methanol fuel cell (DMFC)

“…Impedance data has been modeled by using the ZView software from Scribner Associates using the R s (R e Q 1 ) (R ct Q dl ) circuit model to determine the R s (Resistance faced at high frequency due to charge transfer in solution), R e (Resistance encountered due to electron transfer from the electrode to the current collector, i.e., the carbon toray paper) and R ct (Charge transfer resistance) [29,30]. Q 1 is the constant phase element and Q dl represents contribution from both the double layer capacitance and pseudocapacitance [29,30]. The impedance parameters obtained after fitting the experimental data with circuit model R s (R e Q 1 ) (R ct Q dl ) are shown in Table 1.…”

“…The same procedure as mentioned above was followed for the preparation of working electrodes by uniformly coating the catalyst ink on teflonized carbon papers to have catalyst loading of~0.3 mg Pt cm À2 . Impedance data has been modeled by using the ZView software from Scribner Associates employing the R s (R e Q 1 )(R ct Q dl ) circuit model to determine [29,30]: R s ¼ Solution resistance faced at high frequency due to charge transfer. R e ¼ Resistance for electron transfer from the electrode to current collector (carbon toray paper).…”