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Title: Mechanochemical Nonhydrolytic Sol–Gel-Strategy for the Production of Mesoporous Multimetallic Oxides

Journal Article · · Chemistry of Materials
 [1];  [2]; ORCiD logo [3]; ORCiD logo [4]; ORCiD logo [5];  [4];  [4];  [4];  [6];  [4]; ORCiD logo [7]; ORCiD logo [4]; ORCiD logo [7]; ORCiD logo [7]; ORCiD logo [6]; ORCiD logo [8]
  1. Zhejiang Univ., Hangzhou (China); Oak Ridge National Lab., Oak Ridge, TN (United States); Univ. of Tennessee, Knoxville, TN (United States)
  2. Brookhaven National Lab. (BNL), Upton, NY (United States)
  3. Northwestern Univ., Evanston, IL (United States)
  4. Univ. of Tennessee, Knoxville, TN (United States)
  5. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  6. Shanghai Jiao Tong Univ. (China)
  7. Zhejiang Univ., Hangzhou (China)
  8. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Univ. of Tennessee, Knoxville, TN (United States)

Mesoporous metal oxides with wide pore size, high surface area, and uniform porous structures have demonstrated excellent advantages in various fields. Yet, the state-of-art synthesis approaches are dominated by wet chemistry, accompanied by use of excessive solvent, and the requirement of time-consuming drying process. Herein, we report a mechanochemical solid-state route to synthesize mesoporous Al2O3 (meso-Al2O3) via aluminum isopropoxide-copolymers assembly. The obtained meso-Al2O3 reflects a record high surface area (~644 m2 g-1) and narrow pore size distribution (centered at ~5 nm). Moreover, a mechanochemical nonhydrolytic sol-gel strategy is introduced to fabricate mesoporous transition metal (Cu, Co, Mn, Fe, Mg, Ni)-aluminum binary oxide by using anhydrous metal chlorides and aluminum isopropoxide interplay. More importantly, four or five metals-aluminum oxide complexes with abundant mesopores and single cubic crystalline phase known as high-entropy ceramics are produced. To the best of our knowledge, mesoporous high-entropy metal oxides have not been prepared before, because the high crystallization temperature would make mesopores collapse. Furthermore, this high-entropy property endows (CuNiFeCoMg)Ox-Al2O3 with superior SO2-resisting performance (1000 ppm of SO2 in N2 at 280 °C) in the catalytic oxidation of CO compared to single CuO-Al2O3.

Research Organization:
Brookhaven National Lab. (BNL), Upton, NY (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES). Chemical Sciences, Geosciences, and Biosciences Division; USDOE Office of Energy Efficiency and Renewable Energy (EERE), Vehicle Technologies Office (EE-3V); National Natural Science Foundation of China (NSFC)
Grant/Contract Number:
SC0012704
OSTI ID:
1561254
Report Number(s):
BNL-212070-2019-JAAM
Journal Information:
Chemistry of Materials, Vol. 31, Issue 15; ISSN 0897-4756
Publisher:
American Chemical Society (ACS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 44 works
Citation information provided by
Web of Science

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Cited By (2)

High-entropy ceramics journal February 2020
Low-temperature synthesis of small-sized high-entropy oxides for water oxidation journal January 2019

Figures / Tables (7)


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