Interaction between V2O5 Nanowires and High Pressure CO2 Gas up to 45 bar: Electrical and Structural Study

•CO2 gas pressure-dependent conductance (G(P)) of vanadium-oxides nanowires (VON) from vacuum to 45 bar decreases with the increase of the gas pressure.•Increase in the interlayer distance and decrease in phonons for V3O and VOV bonds were observed after high CO2 pressure exposure.•Oxidation of V4+ to V5+ due to high CO2 pressure is the reason for these changes.•Oxidative dehydrogenation process with VON catalyst under high pressure CO2 atmosphere has potential to improve the efficiency.