Citation:
Wei Wang, Yan Xie, Shaohua Zhang, Xing Liu, Liyun Zhang, Bingsen Zhang, Masatake Haruta, Jiahui Huang. Highly efficient base-free aerobic oxidation of alcohols over gold nanoparticles supported on ZnO-CuO mixed oxides[J]. Chinese Journal of Catalysis,
;2019, 40(12): 1924-1933.
doi:
S1872-2067(19)63429-7
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The design and preparation of suitable supports are of great importance for gold catalysts to attain excellent catalytic performance for alcohol oxidation. In this work, we found that ZnO-CuO mixed oxides supported gold catalysts showed much better catalytic activity for base-free aerobic oxidation of benzyl alcohol than Au/ZnO and Au/CuO catalysts, and among them Au/Zn0.7Cu0.3O displayed the best catalytic performance. In addition, the Au/Zn0.7Cu0.3O catalyst could selectively catalyze the aerobic oxidation of a wide range of alcohols to produce the corresponding carbonyl compounds with high yields under mild conditions without base. Further characterizations indicated that the outstanding catalytic performance of Au/Zn0.7Cu0.3O was correlated with the small size of Au nanoparticles (NPs), good low-temperature reducibility, high concentration of surface oxygen species, and collaborative interaction between Au NPs and mixed oxide.
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