A Nanoarchitecture Based on Silver and Copper Oxide with an Exceptional Response in the Chlorine-Promoted Epoxidation of Ethylene

Adrian Ramirez; Jose L Hueso; Hugo Suarez; Reyes Mallada; Alfonso Ibarra; Silvia Irusta; Jesus Santamaria

doi:10.1002/anie.201603886

A Nanoarchitecture Based on Silver and Copper Oxide with an Exceptional Response in the Chlorine-Promoted Epoxidation of Ethylene

Angew Chem Int Ed Engl. 2016 Sep 5;55(37):11158-61. doi: 10.1002/anie.201603886. Epub 2016 Jul 12.

Authors

Adrian Ramirez¹, Jose L Hueso^{2

3}, Hugo Suarez¹, Reyes Mallada^{1

4}, Alfonso Ibarra⁵, Silvia Irusta^{1

4}, Jesus Santamaria^{6

7}

Affiliations

¹ Department of Chemical Engineering and Environmental Technology and Institute of Nanoscience of Aragon (INA), University of Zaragoza, 50018, Zaragoza, Spain.
² Department of Chemical Engineering and Environmental Technology and Institute of Nanoscience of Aragon (INA), University of Zaragoza, 50018, Zaragoza, Spain. jlhueso@unizar.es.
³ Networking Research Centre on Bioengineering, Biomaterials, and Nanomedicine, CIBER-BBN, 28029, Madrid, Spain. jlhueso@unizar.es.
⁴ Networking Research Centre on Bioengineering, Biomaterials, and Nanomedicine, CIBER-BBN, 28029, Madrid, Spain.
⁵ Advanced Microscopy Laboratory and Institute of Nanoscience of Aragon (LMA-INA), University of Zaragoza, 50018, Zaragoza, Spain.
⁶ Department of Chemical Engineering and Environmental Technology and Institute of Nanoscience of Aragon (INA), University of Zaragoza, 50018, Zaragoza, Spain. jesus.santamaria@unizar.es.
⁷ Networking Research Centre on Bioengineering, Biomaterials, and Nanomedicine, CIBER-BBN, 28029, Madrid, Spain. jesus.santamaria@unizar.es.

PMID: 27404950
DOI: 10.1002/anie.201603886

Abstract

The selective oxidation of ethylene to ethylene epoxide is highly challenging as a result of competing reaction pathways leading to the deep oxidation of both ethylene and ethylene oxide. Herein we present a novel catalyst based on silver and copper oxide with an excellent response in the selective oxidation pathway towards ethylene epoxide. The catalyst is composed of different silver nanostructures dispersed on a tubular copper oxide matrix. This type of hybrid nanoarchitecture seems to facilitate the accommodation of chlorine promoters, leading to high yields at low reaction temperatures. The stability after the addition of chlorine promoters implies a substantial improvement over the industrial practice: a single pretreatment step at ambient pressure suffices in contrast with the common practice of continuously feeding organochlorinated precursors during the reaction.

Keywords: copper; epoxidation; ethylene oxide; heterogeneous catalysis; silver.

Publication types

Research Support, Non-U.S. Gov't