Low-temperature-operative Hydrogen Gas Sensor Employing 10 wt % Pt/Ce0.68Zr0.17Sn0.15O2.0 Catalyst

Abstract A novel catalytic combustion-type hydrogen gas sensor that could operate at low temperatures was devised by employing a Pt-loaded cerium oxide–zirconium oxide–tin oxide solid solution as the hydrogen oxidizing catalyst. Since the present catalyst showed high oxidizing activity toward hydrogen even at 40 °C, stable and quantitative H2 detection was achieved at as low as 40 °C with high selectivity.