TY - JOUR
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
UR - http://www.scopus.com/inward/record.url?scp=84964502140&partnerID=8YFLogxK
UR - http://resolver.tudelft.nl/uuid:7bff9853-1146-447b-828e-8aa25d51e3e2
U2 - 10.1016/j.molcata.2016.04.017
DO - 10.1016/j.molcata.2016.04.017
M3 - Article
AN - SCOPUS:84964502140
SN - 1381-1169
VL - 420
SP - 115
EP - 123
JO - Journal of Molecular Catalysis A: Chemical
JF - Journal of Molecular Catalysis A: Chemical
ER -