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Title: Solvent-free and rapid synthesis of mesoporous Pt–iron oxide catalysts via mechanochemical assembly

Journal Article · · Catalysis Science and Technology
DOI: https://doi.org/10.1039/C9CY00970A · OSTI ID:1570676
 [1];  [2]; ORCiD logo [2];  [3]; ORCiD logo [4]
  1. East China Normal Univ., Shanghai (China)
  2. Shanghai Jiao Tong Univ. (China)
  3. Univ. of Tennessee, Knoxville, TN (United States)
  4. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Brookhaven National Lab. (BNL), Upton, NY (United States)

Mesoporous FexOy and Pt@FexOy have proven promising performance in catalysis. Yet, current methods usually use wet chemistry, which poses several drawbacks. Here, we introduce a simple process of mechanochemical assembly between an iron salt and a triblock copolymer in the solid state that can not only directly form abundant mesopores into FexOy, but also enable a high dispersion of Pt species at the nm or sub-nm scale. In this regard, mesoporous FexOy and Pt@FexOy catalysts with high surface areas (up to 149 m2 g-1) and narrow pore size distributions (~5 nm) can be obtained in a solvent-free and rapid (0.5 h) way. The kinetic energy and frictional heating of ball milling are expected to promote the interaction and diffusion between iron precursors and surfactants, while the solvent-free feature confines their assembly to the mesophase of the P123 copolymer. Moreover, these Pt@FexOy catalysts provide good activity in the total oxidation of propylene and CO.

Research Organization:
Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Materials Sciences & Engineering Division; National Natural Science Foundation of China (NNSFC)
Grant/Contract Number:
SC0012704
OSTI ID:
1570676
Report Number(s):
BNL--212200-2019-JAAM
Journal Information:
Catalysis Science and Technology, Journal Name: Catalysis Science and Technology Journal Issue: 15 Vol. 9; ISSN CSTAGD; ISSN 2044-4753
Publisher:
Royal Society of ChemistryCopyright Statement
Country of Publication:
United States
Language:
English

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