Fig. 2: Photocatalytic ODHE performance of PdZn-ZnO.

a ODHE tests over PdZn-ZnO and comparison photocatalysts. Reaction condition: 5.0 mg photocatalyst, C2H6 (5 vol.% in Ar, 18 mL min–1) + O2 (1 vol.% in Ar, 12 mL min–1), 365 nm LED, 600 mW cm–2. b Photocatalytic activity at a total flow rate of 30 mL min–1 with different C2H6/O2 feed gas ratios. c Photocatalytic stability test for 12 h of continuous irradiation. d Performance comparison with reported thermocatalysts. e Photocatalytic activity at 136 °C under dark-light switch conditions. f Arrhenius plots measured in the dark and light conditions. Light intensity = 55.9 mW cm–2. g Wavelength-dependent AQE and diffuse reflectance spectra of ZnO and PdZn-ZnO. Error bars represent standard deviations obtained from three independent measurements.