Journal
SURFACES AND INTERFACES
Volume 37, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.surfin.2022.102625
Keywords
C=N Bond; P-n heterojunction; Cu2O; TiO2; Borrowing hydrogen reaction
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In this study, for the first time, the hydrogenation of C=N bonds on the surface of TiO2 was achieved using Cu2O/TiO2 type-II (p-n) heterojunction. The probe reactions demonstrated that the hydrogenation of C=N bonds on TiO2 surface can be achieved through borrowing hydrogen reaction (BH, alcohols as hydrogen source). Additionally, the catalytic activity of Cu2O/TiO2 remained efficient even after six reaction cycles.
As a widely used semiconductor photocatalyst, TiO2 has been explored in organic compounds hydrogenation. In this study, the hydrogenation of C=N bonds on the surface of TiO2 was accomplished for the first time utilizing Cu2O/TiO2 type-II (p-n) heterojunction. The probe reactions, hydrogenation of N-benzylphenylamine with benzyl alcohol, and N-methylation of amines with methanol exhibited that the hydrogenation of C=N bonds on TiO2 surface can be achieved through borrowing hydrogen reaction (BH, alcohols as hydrogen source). Addi-tionally, the BH reaction rate could be improved by adding external H+ to the reaction system. The catalytic activity of Cu2O/TiO2 was discovered to remain at an efficient level even after six reaction cycles.
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