Chlorine as an Indicator in the Controllable Preparation of Active Nano-Gold Catalyst
Open Access
- 20 March 2013
- journal article
- research article
- Published by Springer Science and Business Media LLC in Scientific Reports
- Vol. 3 (1), 1503
- https://doi.org/10.1038/srep01503
Abstract
The controllable preparation of nano-gold catalyst maintains a challenge. Except the parameters have been revealed before, here we'd like to show that controllable preparation of active nano-gold catalyst can be achieved using chlorine as an indicator. By tracing the chlorine concentration in the washing step, a series of Au/Fe2O3 catalysts were prepared with co-precipitation method. The applying of these catalysts in CO oxidation and reductive nitrobenzene N-alkylation suggested the active catalysts were prepared from solutions containing ~2 ppm chlorine. The catalytic activity dropped dramatically if the chlorine concentration is >4–6 or ≪ 1 ppm. Extensive characterizations revealed that the active catalyst was composed by nano-gold on the edge of Fe2O3 particle with 8.92 Au-Au coordination numbers. Although the real role of chlorine in the variation of catalyst structure and activity was still ambiguous, the current results should promote the controllable preparation of active nano-Au catalyst.This publication has 40 references indexed in Scilit:
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