Lowering the Operating Temperature of Gold Acetylene Hydrochlorination Catalysts Using Oxidized Carbon Supports

Samuel Pattisson; Simon R. Dawson; Grazia Malta; Nicholas F. Dummer; Louise R. Smith; Anna Lazaridou; David J. Morgan; Simon J. Freakley; Simon A. Kondrat; Joost J. Smit; Peter Johnston; Graham J. Hutchings

doi:10.1021/acscatal.2c04242

Lowering the Operating Temperature of Gold Acetylene Hydrochlorination Catalysts Using Oxidized Carbon Supports

Samuel Pattisson, Simon R. Dawson, Grazia Malta, Nicholas F. Dummer, Louise R. Smith, Anna Lazaridou, David J. Morgan, Simon J. Freakley, Simon A. Kondrat, Joost J. Smit, Peter Johnston, Graham J. Hutchings

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9 Citations (SciVal)

Abstract

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.

Original language	English
Pages (from-to)	14086-14095
Number of pages	10
Journal	ACS Catalysis
Volume	12
Issue number	22
Early online date	2 Nov 2022
DOIs	https://doi.org/10.1021/acscatal.2c04242
Publication status	Published - 18 Nov 2022

Bibliographical note

Funding Information:
The authors thank Johnson Matthey for funding. The authors also thank the Diamond Light Source for access to the B18 beamline for XAS studies (allocation numbers AP15214, SP15151-7, and SP15151-9).

Funding

The authors thank Johnson Matthey for funding. The authors also thank the Diamond Light Source for access to the B18 beamline for XAS studies (allocation numbers AP15214, SP15151-7, and SP15151-9).

Keywords

acetylene
gold
hydrochlorination
light-off
vinyl chloride

ASJC Scopus subject areas

Catalysis
General Chemistry

Access to Document

10.1021/acscatal.2c04242Licence: CC BY

Cite this

Pattisson, S., Dawson, S. R., Malta, G., Dummer, N. F., Smith, L. R., Lazaridou, A., Morgan, D. J., Freakley, S. J., Kondrat, S. A., Smit, J. J., Johnston, P., & Hutchings, G. J. (2022). Lowering the Operating Temperature of Gold Acetylene Hydrochlorination Catalysts Using Oxidized Carbon Supports. ACS Catalysis, 12(22), 14086-14095. https://doi.org/10.1021/acscatal.2c04242

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abstract = "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.",

keywords = "acetylene, gold, hydrochlorination, light-off, vinyl chloride",

author = "Samuel Pattisson and Dawson, {Simon R.} and Grazia Malta and Dummer, {Nicholas F.} and Smith, {Louise R.} and Anna Lazaridou and Morgan, {David J.} and Freakley, {Simon J.} and Kondrat, {Simon A.} and Smit, {Joost J.} and Peter Johnston and Hutchings, {Graham J.}",

note = "Funding Information: The authors thank Johnson Matthey for funding. The authors also thank the Diamond Light Source for access to the B18 beamline for XAS studies (allocation numbers AP15214, SP15151-7, and SP15151-9). ",

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AU - Lazaridou, Anna

AU - Morgan, David J.

AU - Freakley, Simon J.

AU - Kondrat, Simon A.

AU - Smit, Joost J.

AU - Johnston, Peter

AU - Hutchings, Graham J.

N1 - Funding Information: The authors thank Johnson Matthey for funding. The authors also thank the Diamond Light Source for access to the B18 beamline for XAS studies (allocation numbers AP15214, SP15151-7, and SP15151-9).

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AB - 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.

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Lowering the Operating Temperature of Gold Acetylene Hydrochlorination Catalysts Using Oxidized Carbon Supports

Abstract

Bibliographical note

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Keywords

ASJC Scopus subject areas

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