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Lowering the operating temperature of gold acetylene hydrochlorination catalysts using oxidized carbon supports

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posted on 2023-02-17, 12:35 authored by Samuel Pattisson, Simon R Dawson, Grazia Malta, Nicholas F Dummer, Louise R Smith, Anna Lazaridou, David J Morgan, Simon J Freakley, Simon KondratSimon Kondrat, Joost J Smit, Peter Johnston, Graham J Hutchings
The commercialization of gold for acetylene hydrochlorination represents a major scientific landmark. The development of second-generation gold catalysts continues with a focus on derivatives and drop-in replacements with higher activity and stability. Here, we show the influence that the support surface oxygen has on the activity of carbon supported gold catalysts. Variation in the surface oxygen content of carbon is achieved through careful modification of the Hummers chemical oxidation method prior to the deposition of gold. All oxidized carbon-based catalysts resulted in a marked increase in activity at 200 °C when compared to the standard nontreated carbon, with an optimum oxygen content of ca. 18 at % being observed. Increasing oxygen and relative concentration of C-O functionality yields catalysts with light-off temperatures 30-50 °C below the standard catalyst. This understanding opens a promising avenue to produce high activity acetylene hydrochlorination catalysts that can operate at lower temperatures.

Funding

Johnson Matthey

History

School

  • Science

Department

  • Chemistry

Published in

ACS Catalysis

Volume

12

Issue

22

Pages

14086 - 14095

Publisher

American Chemical Society

Version

  • VoR (Version of Record)

Rights holder

© The Authors

Publisher statement

This is an Open Access Article. It is published by American Chemical Society under the Creative Commons Attribution 4.0 International Licence (CC BY). Full details of this licence are available at: https://creativecommons.org/licenses/by/4.0/

Publication date

2022-11-02

Copyright date

2022

ISSN

2155-5435

eISSN

2155-5435

Language

  • en

Depositor

Dr Simon Kondrat. Deposit date: 17 February 2023

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