Electrophoretic deposition of the Pt/C nano-powder as a novel approach towards electrochemical CO gas sensing

In the present study, the electrophoretic deposition technique was successfully employed to deposit Pt/C particles on hydrophobic Polytetrafluoroethylene membranes in non-aqueous media for electrochemical gas sensing applications. Optical microscopy studies showed that uniform crack-free layers were obtained at potential interval of 30–50V on the non-conductive Polytetrafluoroethylene membrane in appropriate durations. The Pt/C deposit formed at 30V for 10min was then electrochemically examined as the working electrode of an electrochemical carbon monoxide gas sensing cell where linear scan voltammetry of the fabricated Pt/C electrode revealed clear and reproducible response to CO gas in H2SO4 solution. •The electrophoretic deposition technique (EPD) was employed to deposit Pt/C particles on a non-conductive hydrophobic Polytetrafluoroethylene (PTFE) membrane.•An organic liquid was used as suspension medium to infiltrate the PTFE membrane, wetting the underlying metallic electrode.•Crack-free layers were obtained at potential interval of 30–50V on the PTFE membrane.•The deposited Pt/C layer was examined as the working electrode of an electrochemical carbon monoxide gas sensing cell.•Linear scan voltammetry of the fabricated Pt/C electrode revealed clear and reproducible response to CO gas in H2SO4 solution.