Promotion or additive activity? the role of gold on zirconia supported iron oxide in high temperature water-gas shift

Abrar A. Hakeem; Jaikishen Rajendran; Freek Kapteijn; Michiel Makkee

doi:10.1016/j.molcata.2016.04.017

Promotion or additive activity? the role of gold on zirconia supported iron oxide in high temperature water-gas shift

Abrar A. Hakeem, Jaikishen Rajendran, Freek Kapteijn, Michiel Makkee^*

^*Corresponding author for this work

ChemE/Catalysis Engineering

Research output: Contribution to journal › Article › Scientific › peer-review

3 Citations (Scopus)

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Abstract

Sulfur addition is used to probe the role of gold in Au/Fe₂O₃/ZrO₂ catalyst in the water-gas shift (WGS) at high temperature (623-773 K) and pressure (21 bar). Sulfur poisoning unravels the WGS activity contribution by gold nano-particles and gold promotion of iron oxide in Au/Fe₂O₃/ZrO₂. The active site(s) on gold nano-particles are poisoned by sulfur, which is reflected in a suppressed WGS activity of presulfided Au/ZrO₂. The same holds for the WGS activity contribution of gold nano-particles in Au/Fe₂O₃/ZrO₂, but the promotion by gold of the Fe₂O₃ is still present after presulfidation. The WGS performance of Fe₂O₃/ZrO₂ and Au/ZrO₂ catalysts with and without sulfur pretreatment are also compared with that of Au/Fe₂O₃/ZrO₂.

Original language	English
Pages (from-to)	115-123
Number of pages	9
Journal	Journal of Molecular Catalysis A: Chemical
Volume	420
DOIs	https://doi.org/10.1016/j.molcata.2016.04.017
Publication status	Published - 1 Aug 2016

Keywords

Gold promotion
Iron oxide
Sulfur
Water-gas shift
Zirconia

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10.1016/j.molcata.2016.04.017

AAHakeem_et_al_Revised (clean)Accepted author manuscript, 1.07 MBLicence: CC BY-NC-ND

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title = "Promotion or additive activity? the role of gold on zirconia supported iron oxide in high temperature water-gas shift",

abstract = "Sulfur addition is used to probe the role of gold in Au/Fe2O3/ZrO2 catalyst in the water-gas shift (WGS) at high temperature (623-773 K) and pressure (21 bar). Sulfur poisoning unravels the WGS activity contribution by gold nano-particles and gold promotion of iron oxide in Au/Fe2O3/ZrO2. The active site(s) on gold nano-particles are poisoned by sulfur, which is reflected in a suppressed WGS activity of presulfided Au/ZrO2. The same holds for the WGS activity contribution of gold nano-particles in Au/Fe2O3/ZrO2, but the promotion by gold of the Fe2O3 is still present after presulfidation. The WGS performance of Fe2O3/ZrO2 and Au/ZrO2 catalysts with and without sulfur pretreatment are also compared with that of Au/Fe2O3/ZrO2.",

keywords = "Gold promotion, Iron oxide, Sulfur, Water-gas shift, Zirconia",

author = "Hakeem, {Abrar A.} and Jaikishen Rajendran and Freek Kapteijn and Michiel Makkee",

year = "2016",

month = aug,

day = "1",

doi = "10.1016/j.molcata.2016.04.017",

language = "English",

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journal = "Journal of Molecular Catalysis A: Chemical",

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T1 - Promotion or additive activity? the role of gold on zirconia supported iron oxide in high temperature water-gas shift

AU - Hakeem, Abrar A.

AU - Rajendran, Jaikishen

AU - Kapteijn, Freek

AU - Makkee, Michiel

PY - 2016/8/1

Y1 - 2016/8/1

N2 - Sulfur addition is used to probe the role of gold in Au/Fe2O3/ZrO2 catalyst in the water-gas shift (WGS) at high temperature (623-773 K) and pressure (21 bar). Sulfur poisoning unravels the WGS activity contribution by gold nano-particles and gold promotion of iron oxide in Au/Fe2O3/ZrO2. The active site(s) on gold nano-particles are poisoned by sulfur, which is reflected in a suppressed WGS activity of presulfided Au/ZrO2. The same holds for the WGS activity contribution of gold nano-particles in Au/Fe2O3/ZrO2, but the promotion by gold of the Fe2O3 is still present after presulfidation. The WGS performance of Fe2O3/ZrO2 and Au/ZrO2 catalysts with and without sulfur pretreatment are also compared with that of Au/Fe2O3/ZrO2.

AB - Sulfur addition is used to probe the role of gold in Au/Fe2O3/ZrO2 catalyst in the water-gas shift (WGS) at high temperature (623-773 K) and pressure (21 bar). Sulfur poisoning unravels the WGS activity contribution by gold nano-particles and gold promotion of iron oxide in Au/Fe2O3/ZrO2. The active site(s) on gold nano-particles are poisoned by sulfur, which is reflected in a suppressed WGS activity of presulfided Au/ZrO2. The same holds for the WGS activity contribution of gold nano-particles in Au/Fe2O3/ZrO2, but the promotion by gold of the Fe2O3 is still present after presulfidation. The WGS performance of Fe2O3/ZrO2 and Au/ZrO2 catalysts with and without sulfur pretreatment are also compared with that of Au/Fe2O3/ZrO2.

KW - Gold promotion

KW - Iron oxide

KW - Sulfur

KW - Water-gas shift

KW - Zirconia

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AN - SCOPUS:84964502140

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JO - Journal of Molecular Catalysis A: Chemical

JF - Journal of Molecular Catalysis A: Chemical

ER -

Promotion or additive activity? the role of gold on zirconia supported iron oxide in high temperature water-gas shift

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Keywords

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