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Holey Lamellar High‐Entropy Oxide as an Ultra‐High‐Activity Heterogeneous Catalyst for Solvent‐free Aerobic Oxidation of Benzyl Alcohol
Author(s) -
Feng Danyang,
Dong Yangbo,
Zhang Liangliang,
Ge Xin,
Zhang Wei,
Dai Sheng,
Qiao ZhenAn
Publication year - 2020
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.202004892
Subject(s) - benzyl alcohol , catalysis , benzaldehyde , lamellar structure , chemistry , oxide , noble metal , benzoic acid , mesoporous material , solvent , alcohol oxidation , alcohol , inorganic chemistry , heterogeneous catalysis , materials science , chemical engineering , organic chemistry , engineering , crystallography
The development of noble‐metal‐free heterogeneous catalysts is promising for selective oxidation of aromatic alcohols; however, the relatively low conversion of non‐noble metal catalysts under solvent‐free atmospheric conditions hinders their industrial application. Now, a holey lamellar high entropy oxide (HEO) Co 0.2 Ni 0.2 Cu 0.2 Mg 0.2 Zn 0.2 O material with mesoporous structure is prepared by an anchoring and merging process. The HEO has ultra‐high catalytic activity for the solvent‐free aerobic oxidation of benzyl alcohol. Up to 98 % conversion can be achieved in only 2 h, to our knowledge, the highest conversion of benzyl alcohol by oxidation to date. By regulating the catalytic reaction parameters, benzoic acid or benzaldehyde can be selectively optimized as the main product. Analytical characterizations and calculations provide a deeper insight into the catalysis mechanism, revealing abundant oxygen vacancies and holey lamellar framework contribute to the ultra‐high catalytic activity.