How Gold Deposition Affects Anatase Performance in the Photo-catalytic Oxidation of Cyclohexane

Joana T.  Carneiro; Chieh-Chao Yang; John A. Moma; Jacob A. Moulijn; Guido Mul

doi:10.1007/s10562-008-9801-1

How Gold Deposition Affects Anatase Performance in the Photo-catalytic Oxidation of Cyclohexane

Joana T. Carneiro, Chieh-Chao Yang, John A. Moma, Jacob A. Moulijn, Guido Mul

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

71 Citations (Scopus)

86 Downloads (Pure)

Abstract

Gold deposition on Hombikat UV100 was found to negatively affect the activity of this Anatase catalyst in selective photo-oxidation of cyclohexane. By ammonia TPD and DRIFT spectroscopy it was determined that the Au deposition procedure leads to a significant decrease in OH-group density (mol m−2 BET) on Hombikat, suggesting that the amount of surface OH-groups, rather than the presence or absence of Au, is determining the catalytic performance. The importance of surface OH-groups was demonstrated by comparing the performance of Hombikat (with and without Au deposition) to surface propoxylated TiO2, synthesized by a sol–gel method from titanium (IV) isopropoxide. The effect of the deposition recipe of noble metals on the surface composition of TiO2 should thus be taken into account in evaluating and explaining photocatalytic performance of TiO2 modified by noble metals (Au), in particular in non-aqueous phase reactions.

Original language	English
Pages (from-to)	12-19
Journal	Catalysis letters
Volume	129
Issue number	1-2
DOIs	https://doi.org/10.1007/s10562-008-9801-1
Publication status	Published - 2009

Access to Document

10.1007/s10562-008-9801-1Licence: CC BY

ArticleFinal published version, 443 KBLicence: CC BY

Cite this

@article{410032314abb4f0894900be39948b1ca,

title = "How Gold Deposition Affects Anatase Performance in the Photo-catalytic Oxidation of Cyclohexane",

abstract = "Gold deposition on Hombikat UV100 was found to negatively affect the activity of this Anatase catalyst in selective photo-oxidation of cyclohexane. By ammonia TPD and DRIFT spectroscopy it was determined that the Au deposition procedure leads to a significant decrease in OH-group density (mol m−2 BET) on Hombikat, suggesting that the amount of surface OH-groups, rather than the presence or absence of Au, is determining the catalytic performance. The importance of surface OH-groups was demonstrated by comparing the performance of Hombikat (with and without Au deposition) to surface propoxylated TiO2, synthesized by a sol–gel method from titanium (IV) isopropoxide. The effect of the deposition recipe of noble metals on the surface composition of TiO2 should thus be taken into account in evaluating and explaining photocatalytic performance of TiO2 modified by noble metals (Au), in particular in non-aqueous phase reactions.",

author = "Carneiro, {Joana T.} and Chieh-Chao Yang and Moma, {John A.} and Moulijn, {Jacob A.} and Guido Mul",

year = "2009",

doi = "10.1007/s10562-008-9801-1",

language = "English",

volume = "129",

pages = "12--19",

journal = "Catalysis letters",

issn = "1011-372X",

publisher = "Kluwer Academic Publishers",

number = "1-2",

}

TY - JOUR

T1 - How Gold Deposition Affects Anatase Performance in the Photo-catalytic Oxidation of Cyclohexane

AU - Carneiro, Joana T.

AU - Yang, Chieh-Chao

AU - Moma, John A.

AU - Moulijn, Jacob A.

AU - Mul, Guido

PY - 2009

Y1 - 2009

N2 - Gold deposition on Hombikat UV100 was found to negatively affect the activity of this Anatase catalyst in selective photo-oxidation of cyclohexane. By ammonia TPD and DRIFT spectroscopy it was determined that the Au deposition procedure leads to a significant decrease in OH-group density (mol m−2 BET) on Hombikat, suggesting that the amount of surface OH-groups, rather than the presence or absence of Au, is determining the catalytic performance. The importance of surface OH-groups was demonstrated by comparing the performance of Hombikat (with and without Au deposition) to surface propoxylated TiO2, synthesized by a sol–gel method from titanium (IV) isopropoxide. The effect of the deposition recipe of noble metals on the surface composition of TiO2 should thus be taken into account in evaluating and explaining photocatalytic performance of TiO2 modified by noble metals (Au), in particular in non-aqueous phase reactions.

AB - Gold deposition on Hombikat UV100 was found to negatively affect the activity of this Anatase catalyst in selective photo-oxidation of cyclohexane. By ammonia TPD and DRIFT spectroscopy it was determined that the Au deposition procedure leads to a significant decrease in OH-group density (mol m−2 BET) on Hombikat, suggesting that the amount of surface OH-groups, rather than the presence or absence of Au, is determining the catalytic performance. The importance of surface OH-groups was demonstrated by comparing the performance of Hombikat (with and without Au deposition) to surface propoxylated TiO2, synthesized by a sol–gel method from titanium (IV) isopropoxide. The effect of the deposition recipe of noble metals on the surface composition of TiO2 should thus be taken into account in evaluating and explaining photocatalytic performance of TiO2 modified by noble metals (Au), in particular in non-aqueous phase reactions.

U2 - 10.1007/s10562-008-9801-1

DO - 10.1007/s10562-008-9801-1

M3 - Article

SN - 1011-372X

VL - 129

SP - 12

EP - 19

JO - Catalysis letters

JF - Catalysis letters

IS - 1-2

ER -

How Gold Deposition Affects Anatase Performance in the Photo-catalytic Oxidation of Cyclohexane

Abstract

Access to Document

Fingerprint

Cite this