期刊
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
卷 137, 期 21, 页码 6906-6911出版社
AMER CHEMICAL SOC
DOI: 10.1021/jacs.5b03333
关键词
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资金
- National Science Foundation through the Nano/Bio Interface Center at the University of Pennsylvania [DMR08-32802]
- Department of Energy, Office of Basic Energy Sciences, Chemical Sciences, Geosciences and Biosciences Division [DE-FG02-13ER16380]
- Richard Perry University Professorship
A simple yet efficient method to remove organic ligands from supported nanocrystals is reported for activating uniform catalysts prepared by colloidal synthesis procedures. The method relies on a fast thermal treatment in which ligands are quickly removed in air, before sintering can cause changes in the size and shape of the supported nanocrystals. A short treatment at high temperatures is found to be sufficient for activating the systems for catalytic reactions. We show that this method is widely applicable to nanostructures of different sizes, shapes, and compositions. Being rapid and effective, this procedure allows the production of monodisperse heterogeneous catalysts for studying a variety of structureactivity relationships. We show here results on methane steam reforming, where the particle size controls the CO/CO2 ratio on alumina-supported Pd, demonstrating the potential applications of the method in catalysis.
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