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Enhancing the stability of copper chromite catalysts for the selective hydrogenation of furfural using ALD overcoating

Author:
Zhang, Hongbo, Lei, Yu, Kropf, A. Jeremy, Zhang, Guanghui, Elam, Jeffrey W., Miller, Jeffrey T., Sollberger, Fred, Ribeiro, Fabio, Akatay, M. Cem, Stach, Eric A., Dumesic, James A., Marshall, Christopher L.
Source:
Journal of catalysis 2014 v.317 pp. 284-292
ISSN:
0021-9517
Subject:
activation energy, aluminum oxide, catalysts, copper, furfural, gases, hydrogenation, spectroscopy, temperature
Abstract:
The stability of a gas-phase furfural hydrogenation catalyst (CuCr2O4⋅CuO) was enhanced by depositing a thin Al2O3 layer using atomic layer deposition (ALD). Based on temperature-programed reduction (TPR) measurements, the reduction temperature of Cu was raised significantly, and the activation energy for furfural reduction was decreased following the ALD treatment. Thinner ALD layers yielded higher furfural hydrogenation activities. X-ray absorption fine structure (XAFS) spectroscopy studies indicated that Cu¹⁺/Cu⁰ are the active species for furfural reduction.
Agid:
5991368