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

Abstract

Mesoporous Fe xO y and Pt@Fe xO y 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 Fe xO y, but also enable a high dispersion of Pt species at the nm or sub-nm scale. In this regard, mesoporous FexOy and Pt@Fe xO y catalysts with high surface areas (up to 149 m 2 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@Fe xO y catalysts provide good activity in the total oxidation of propylene and CO.

Authors:
 [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)
Publication Date:
Research Org.:
Brookhaven National Lab. (BNL), Upton, NY (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Materials Sciences & Engineering Division; National Natural Science Foundation of China (NNSFC)
OSTI Identifier:
1570676
Report Number(s):
BNL-212200-2019-JAAM
Journal ID: ISSN 2044-4753; CSTAGD
Grant/Contract Number:  
SC0012704
Resource Type:
Accepted Manuscript
Journal Name:
Catalysis Science and Technology
Additional Journal Information:
Journal Volume: 9; Journal Issue: 15; Journal ID: ISSN 2044-4753
Publisher:
Royal Society of Chemistry
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE

Citation Formats

Zhou, Min, Zhao, Jiahua, Zhang, Pengfei, Chen, Nanqing, and Yang, Shize. Solvent-free and rapid synthesis of mesoporous Pt–iron oxide catalysts via mechanochemical assembly. United States: N. p., 2019. Web. doi:10.1039/C9CY00970A.
Zhou, Min, Zhao, Jiahua, Zhang, Pengfei, Chen, Nanqing, & Yang, Shize. Solvent-free and rapid synthesis of mesoporous Pt–iron oxide catalysts via mechanochemical assembly. United States. doi:10.1039/C9CY00970A.
Zhou, Min, Zhao, Jiahua, Zhang, Pengfei, Chen, Nanqing, and Yang, Shize. Mon . "Solvent-free and rapid synthesis of mesoporous Pt–iron oxide catalysts via mechanochemical assembly". United States. doi:10.1039/C9CY00970A.
@article{osti_1570676,
title = {Solvent-free and rapid synthesis of mesoporous Pt–iron oxide catalysts via mechanochemical assembly},
author = {Zhou, Min and Zhao, Jiahua and Zhang, Pengfei and Chen, Nanqing and Yang, Shize},
abstractNote = {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.},
doi = {10.1039/C9CY00970A},
journal = {Catalysis Science and Technology},
number = 15,
volume = 9,
place = {United States},
year = {2019},
month = {7}
}

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Works referenced in this record:

Crystal-to-Crystal Phase Transition in Self-Assembled Mesoporous Iron Oxide Films
journal, January 2006

  • Brezesinski, Torsten; Groenewolt, Matthijs; Antonietti, Markus
  • Angewandte Chemie International Edition, Vol. 45, Issue 5, p. 781-784
  • DOI: 10.1002/anie.200502332

Triblock Copolymer Syntheses of Mesoporous Silica with Periodic 50 to 300 Angstrom Pores
journal, January 1998