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A General Route to Flame Aerosol Synthesis and In Situ Functionalization of Mesoporous Silica

Journal Article · · Angewandte Chemie
 [1];  [2];  [1];  [1];  [1];  [1];  [1];  [3];  [1];  [2];  [3]
  1. Department of Chemical and Biological Engineering University at Buffalo (SUNY) Buffalo NY 14260 USA
  2. The Molecular Foundry Lawrence Berkeley National Laboratory Berkeley CA 94720 USA
  3. Department of Chemical and Biological Engineering University at Buffalo (SUNY) Buffalo NY 14260 USA, RENEW Institute University at Buffalo (SUNY) Buffalo NY 14260 USA

Abstract

Mesoporous silica is a versatile material for energy, environmental, and medical applications. Here, for the first time, we report a flame aerosol synthesis method for a class of mesoporous silica with hollow structure and specific surface area exceeding 1000 m 2  g −1 . We show its superior performance in water purification, as a drug carrier, and in thermal insulation. Moreover, we propose a general route to produce mesoporous nanoshell‐supported nanocatalysts by in situ decoration with active nanoclusters, including noble metal (Pt/SiO 2 ), transition metal (Ni/SiO 2 ), metal oxide (CrO 3 /SiO 2 ), and alumina support (Co/Al 2 O 3 ). As a prototypical application, we perform dry reforming of methane using Ni/SiO 2 , achieving constant 97 % CH 4 and CO 2 conversions for more than 200 hours, dramatically outperforming an MCM‐41 supported Ni catalyst. This work provides a scalable strategy to produce mesoporous nanoshells and proposes an in situ functionalization mechanism to design and produce flexible catalysts for many reactions.

Sponsoring Organization:
USDOE
Grant/Contract Number:
NONE; AC02-05CH11231
OSTI ID:
1877308
Journal Information:
Angewandte Chemie, Journal Name: Angewandte Chemie Journal Issue: 35 Vol. 134; ISSN 0044-8249
Publisher:
Wiley Blackwell (John Wiley & Sons)Copyright Statement
Country of Publication:
Germany
Language:
English

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