Abstract
| Original language | English |
|---|---|
| Journal | Topics in catalysis |
| Volume | 62 |
| Issue number | 7-11 |
| Pages (from-to) | 649-659 |
| ISSN | 1022-5528 |
| DOIs | |
| Publication status | Published - 2019 |
Keywords
- Strong metal support interactions (SMSI)
- Temperature Programmed Desorption of Hydrogen ( H2-TPD)
- Reactive frontal Chromatography by Nitrous oxide ( N2O-RFC)
Cite this
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Mapping Support Interactions in Copper Catalysts. / Chatterjee, Rishika; Kuld, Sebastian; van den Berg, Roy; Chen, Aling; Shen, Wenjie; Christensen, Jakob Munkholt; Jensen, Anker Degn; Sehested, Jens.
In: Topics in catalysis, Vol. 62, No. 7-11, 2019, p. 649-659.Research output: Contribution to journal › Journal article › Research › peer-review
TY - JOUR
T1 - Mapping Support Interactions in Copper Catalysts
AU - Chatterjee, Rishika
AU - Kuld, Sebastian
AU - van den Berg, Roy
AU - Chen, Aling
AU - Shen, Wenjie
AU - Christensen, Jakob Munkholt
AU - Jensen, Anker Degn
AU - Sehested, Jens
PY - 2019
Y1 - 2019
N2 - Intrinsic activity is often reported as a Turnover Frequency (TOF) of an active phase and is determined from an overall activity and a specific active surface area. The latter parameter is often determined by selective chemisorption techniques, but (strong) metal-support interactions, (S)MSI, between the metal and the carrier in an interplay with the nature of the probe molecules may distort the measurements. Here, a double-area-estimation approach is used for fast and accurate evaluation of (S)MSI effects in supported Cu catalysts: Firstly, baselines for the Temperature Programmed Desorption of Hydrogen (H2-TPD) and Reactive Frontal Chromatography by Nitrous oxide (N2O-RFC) methods commonly used to titrate Cu areas were established by comparison with Brunauer-Emmett-Teller (BET) surface areas using a series of pure Cu catalysts. Pure unsupported Cu samples, free from support interactions, were used to determine the stoichiometries between the probe molecules, H2 and N2O, and Cu surface atoms. This resulted in values of 2.08 ± 0.14:1 (Cu:O) and 2.81 ± 0.09:1 (Cu:H2). Cu on a wide range of support materials were subsequently analyzed by H2-TPD and N2O-RFC and benchmarked according to the unsupported Cu reference. This was done to study metal support interactions and increase the understanding of the nature of the interactions between Cu and different carriers.
AB - Intrinsic activity is often reported as a Turnover Frequency (TOF) of an active phase and is determined from an overall activity and a specific active surface area. The latter parameter is often determined by selective chemisorption techniques, but (strong) metal-support interactions, (S)MSI, between the metal and the carrier in an interplay with the nature of the probe molecules may distort the measurements. Here, a double-area-estimation approach is used for fast and accurate evaluation of (S)MSI effects in supported Cu catalysts: Firstly, baselines for the Temperature Programmed Desorption of Hydrogen (H2-TPD) and Reactive Frontal Chromatography by Nitrous oxide (N2O-RFC) methods commonly used to titrate Cu areas were established by comparison with Brunauer-Emmett-Teller (BET) surface areas using a series of pure Cu catalysts. Pure unsupported Cu samples, free from support interactions, were used to determine the stoichiometries between the probe molecules, H2 and N2O, and Cu surface atoms. This resulted in values of 2.08 ± 0.14:1 (Cu:O) and 2.81 ± 0.09:1 (Cu:H2). Cu on a wide range of support materials were subsequently analyzed by H2-TPD and N2O-RFC and benchmarked according to the unsupported Cu reference. This was done to study metal support interactions and increase the understanding of the nature of the interactions between Cu and different carriers.
KW - Strong metal support interactions (SMSI)
KW - Temperature Programmed Desorption of Hydrogen ( H2-TPD)
KW - Reactive frontal Chromatography by Nitrous oxide ( N2O-RFC)
U2 - 10.1007/s11244-019-01150-9
DO - 10.1007/s11244-019-01150-9
M3 - Journal article
VL - 62
SP - 649
EP - 659
JO - Topics in Catalysis
JF - Topics in Catalysis
SN - 1022-5528
IS - 7-11
ER -