H2 evolution activity from MSRP2-675Reversible photoactivation by UV−vis lightat 453K over 5.8% Cu/TiO2 light irradiation due to reduction of oxidized Cu to Cu. Our new strategy to regulate the structural evolution Conclusion Deactivation of Cu/TiO2 catalyst was recovered by UV of active surfaces during the reaction, which provides alternative protocols to construct efficient reaction center toward broader chemical reactions.Key Words: Cu/TiO2, Light irradiation, Methanol steam reforming Key Words: Cu/TiO2, Light irradiation, Methanol steam reforming Theme underDiscussionDiscussionTime-on-stream H2 production over 5.8% Cu/TiO2 underdifferent light activation conditions at 443K Highly active support for Cu reactivation Optimal cocatalyst loading condition High activity at lower temperature HR-TEM image of deactivated Cu/TiO2-D (left) and reactivated Cu/TiO2-PA (right).baa)XRD patterns of Cu/TiO2 catalysts in different reaction stages b) Fourier-transformed Cu K-edge EXAFS oscillation of Cu/TiO2 catalysts in different states.Characterization of catalyst surfaceFuture PlanHydrogen (H2) is a significant alternative clean energy carrier and chemical building block.Methanol steam reforming (MSR) is recognized as an effective and efficient method for hydrogen production.Precious metal-free Cu catalyst is often utilized as a MSR catalyst. However, reaction temperature is relatively high; at milder condition, the catalyst was deactivated easily.To overcome this problem, new cupper catalyst system was sought to be developed.Hydrogen Production Catalyst Materials Group, GREEN Tetsuya KakoE-mail：： KAKO.Tetsuya@nims.go.jpIntroductionCu was oxidized and Cu2O was formed on the deactivated catalyst, butCu2O was reduced again by UV light irradiation and Cu was reproduced on the reactivated catalyst surface.Quick deactivation, no regeneration by Cu LSPRRegeneration by UV light irradiationHydrogen production at moderate Hydrogen production at moderate temperature using Cu catalysttemperature using Cu catalyst
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