EPA Science Inventory

Magnetic gold nanocatalyst (nanocat-Fe–Au): catalytic applications for the oxidative esterification and hydrogen transfer reactions

Citation:

Gawande, M., A. Rathi, J. Tucek, K. Safarova, N. Bundaleski, O. Teodoro, L. kvitek, R. Varma, AND R. Zboril. Magnetic gold nanocatalyst (nanocat-Fe–Au): catalytic applications for the oxidative esterification and hydrogen transfer reactions. GREEN CHEMISTRY. Royal Society of Chemistry, Cambridge, Uk, 16(9):4019-4430, (2014).

Description:

An efficient and sustainable protocol is described for the oxidative esterification of aldehydes and the reduction of aromatic nitro compounds that uses magnetically separable and reusable maghemite-supported gold nanocatalyst (nanocat-Fe-Au) under mild conditions. The complex chemical, morphological, structural and size analyses, including e.g. XPS, HRTEM, in-field Mössbauer spectroscopy and HRTEM, revealed that the hybrid material is composed of well-defined stoichiometric maghemite support (20-30 nm) decorated with ultrasmall (5-6 nm) gold nanoparticles. The hybrid catalytic system containing 4 wt% of nanogold has been generated using simple impregnation methods in aqueous medium from readily available starting materials and was recycled five times without any significant loss in catalytic activity; high yields, 40-95% and 83-94% for oxidative esterification and reduction reactions, respectively, were obtained.

Purpose/Objective:

Submitted for publication to the Royal Society of Chemistry (RSC) journal, Green Chemistry.

URLs/Downloads:

http://dx.doi.org/10.1039/c4gc00774c   Exit

Record Details:

Record Type: DOCUMENT (JOURNAL/PEER REVIEWED JOURNAL)
Start Date: 09/01/2014
Completion Date: 09/01/2014
Record Last Revised: 08/29/2014
Record Created: 08/19/2014
Record Released: 08/19/2014
OMB Category: Other
Record ID: 284203

Organization:

U.S. ENVIRONMENTAL PROTECTION AGENCY

OFFICE OF RESEARCH AND DEVELOPMENT

NATIONAL RISK MANAGEMENT RESEARCH LABORATORY

SUSTAINABLE TECHNOLOGY DIVISION

CLEAN PROCESSES BRANCH