The photo-thermal reaction of ethanol to hydrogen and acetaldehyde over Ag/TiO₂ is studied in flow conditions. Hydrogen production is mostly photo driven below 170 °C, and thermally driven above 250 °C. An increase in the overall reaction rates is observed when both photons and heat (photo-thermal effect) are present in the 125-225 °C temperature window for acetaldehyde and hydrogen production (via ethanol dehydrogenation; C₂H₅OH → CH₃CHO + H₂). The activation energies for photo-thermal and thermal reactions, measured in steady state conditions, are 31 and 40 kJmol^-1, respectively. The maximum enhancement in reaction rates is 1.5× for acetaldehyde and 10× for hydrogen production. The enhancement for these two product should be the same. Reasons for these discrepancies are discussed. Other minor reaction products including ethylene and acetone appeared above 225 °C. Possible reasons for the enhanced rate of ethanol reaction under photo-thermal conditions, linked to plasmon resonance of Ag particles of Ag/TiO₂, are discussed. Light to Chemical Energy Conversion (LCEC) was found equal to 0.12 % and 0.25 % at 170 °C and 225 °C, respectively

在流动条件下研究了乙醇在Ag / TiO _2上与氢和乙醛的光热反应。制氢主要是在低于170°C的条件下进行光驱，而热驱动则是在250°C以上的过程中。当光子和热同时存在于125-225°C的乙醛和氢气产生窗口（通过乙醇脱氢; C ₂ H ₅ OH→CH ₃ CHO）的温度窗口中时，观察到总反应速率增加+ H ₂）。在稳态条件下测得的光热和热反应的活化能为31和40 kJmol ^-1， 分别。对于乙醛，反应速率的最大提高为1.5倍，对于产氢，反应速率的最大提高为10倍。这两个产品的增强功能应该相同。讨论了这些差异的原因。其他次要反应产物包括乙烯和丙酮出现在225°C以上。讨论了在光热条件下提高乙醇反应速率的可能原因，这与Ag / TiO ₂的Ag粒子的等离子体激元共振有关。在170°C和225°C下，光化学能转化率（LCEC）分别等于0.12％和0.25％