---
_id: '63991'
abstract:
- lang: eng
text: A series of 1 and 2 nm sized platinum nanoparticles (Pt-NPs) deposited on
different support materials, namely, gamma-alumina (gamma-Al2O3), titanium dioxide
(TiO2), silicon dioxide (SiO2) and fumed silica are investigated by solid-state
NMR and dynamic nuclear polarization enhanced NMR spectroscopy (DNP). DNP signal
enhancement factors up to 170 enable gaining deeper insight into the surface chemistry
of Pt-NPs. Carbon monoxide is used as a probe molecule to analyze the adsorption
process and the surface chemistry on the supported Pt-NPs. The studied systems
show significant catalytic activity in carbon monoxide oxidation on their surface
at room temperature. The underlying catalytic mechanism is the water-gas shift
reaction. In the case of alumina as the support the produced CO2 reacts with the
surface to form carbonate, which is revealed by solid-state NMR. A similar carbonate
formation is also observed when physical mixtures of neat alumina with silica,
fumed silica and titania supported Pt-NPs are studied.
author:
- first_name: V.
full_name: Klimavicius, V.
last_name: Klimavicius
- first_name: S.
full_name: Neumann, S.
last_name: Neumann
- first_name: S.
full_name: Kunz, S.
last_name: Kunz
- first_name: Torsten
full_name: Gutmann, Torsten
id: '118165'
last_name: Gutmann
- first_name: G.
full_name: Buntkowsky, G.
last_name: Buntkowsky
citation:
ama: Klimavicius V, Neumann S, Kunz S, Gutmann T, Buntkowsky G. Room temperature
CO oxidation catalysed by supported Pt nanoparticles revealed by solid-state NMR
and DNP spectroscopy. Catalysis Science & Technology. 2019;9(14):3743–3752.
doi:10.1039/c9cy00684b
apa: Klimavicius, V., Neumann, S., Kunz, S., Gutmann, T., & Buntkowsky, G. (2019).
Room temperature CO oxidation catalysed by supported Pt nanoparticles revealed
by solid-state NMR and DNP spectroscopy. Catalysis Science & Technology,
9(14), 3743–3752. https://doi.org/10.1039/c9cy00684b
bibtex: '@article{Klimavicius_Neumann_Kunz_Gutmann_Buntkowsky_2019, title={Room
temperature CO oxidation catalysed by supported Pt nanoparticles revealed by solid-state
NMR and DNP spectroscopy}, volume={9}, DOI={10.1039/c9cy00684b},
number={14}, journal={Catalysis Science & Technology}, author={Klimavicius,
V. and Neumann, S. and Kunz, S. and Gutmann, Torsten and Buntkowsky, G.}, year={2019},
pages={3743–3752} }'
chicago: 'Klimavicius, V., S. Neumann, S. Kunz, Torsten Gutmann, and G. Buntkowsky.
“Room Temperature CO Oxidation Catalysed by Supported Pt Nanoparticles Revealed
by Solid-State NMR and DNP Spectroscopy.” Catalysis Science & Technology
9, no. 14 (2019): 3743–3752. https://doi.org/10.1039/c9cy00684b.'
ieee: 'V. Klimavicius, S. Neumann, S. Kunz, T. Gutmann, and G. Buntkowsky, “Room
temperature CO oxidation catalysed by supported Pt nanoparticles revealed by solid-state
NMR and DNP spectroscopy,” Catalysis Science & Technology, vol. 9,
no. 14, pp. 3743–3752, 2019, doi: 10.1039/c9cy00684b.'
mla: Klimavicius, V., et al. “Room Temperature CO Oxidation Catalysed by Supported
Pt Nanoparticles Revealed by Solid-State NMR and DNP Spectroscopy.” Catalysis
Science & Technology, vol. 9, no. 14, 2019, pp. 3743–3752, doi:10.1039/c9cy00684b.
short: V. Klimavicius, S. Neumann, S. Kunz, T. Gutmann, G. Buntkowsky, Catalysis
Science & Technology 9 (2019) 3743–3752.
date_created: 2026-02-07T15:47:21Z
date_updated: 2026-02-17T16:16:33Z
doi: 10.1039/c9cy00684b
extern: '1'
intvolume: ' 9'
issue: '14'
keyword:
- Chemistry
- gamma-alumina
- hydrogenation
- silica
- c-13
- interactions
- metal-catalysts
- particle-size
- platinum nanoparticles
- sites
- surface
- water-gas shift
language:
- iso: eng
page: 3743–3752
publication: Catalysis Science & Technology
publication_identifier:
issn:
- 2044-4753
status: public
title: Room temperature CO oxidation catalysed by supported Pt nanoparticles revealed
by solid-state NMR and DNP spectroscopy
type: journal_article
user_id: '100715'
volume: 9
year: '2019'
...
---
_id: '63956'
abstract:
- lang: eng
text: The synthesis of novel robust and stable iridium-based immobilized catalysts
on silica-polymer hybrid materials (Si-PB-Ir) is described. These catalysts are
characterized by a combination of 1D P-31 CP-MAS and 2D P-31-H-1 HETCOR and J-resolved
multinuclear solid state NMR experiments. Different binding situations such as
singly and multiply coordinated phosphines are identified. Density functional
theory (DFT) calculations are performed to corroborate the interpretation of the
experimental NMR data, in order to propose a structural model of the heterogenized
catalysts. Finally, the catalytic activity of the Si-PB-Ir catalysts is investigated
for the hydrogenation of styrene employing para-enriched hydrogen gas.
author:
- first_name: Torsten
full_name: Gutmann, Torsten
id: '118165'
last_name: Gutmann
- first_name: S.
full_name: Alkhagani, S.
last_name: Alkhagani
- first_name: N.
full_name: Rothermel, N.
last_name: Rothermel
- first_name: H. H.
full_name: Limbach, H. H.
last_name: Limbach
- first_name: H.
full_name: Breitzke, H.
last_name: Breitzke
- first_name: G.
full_name: Buntkowsky, G.
last_name: Buntkowsky
citation:
ama: Gutmann T, Alkhagani S, Rothermel N, Limbach HH, Breitzke H, Buntkowsky G.
P-31-Solid-State NMR Characterization and Catalytic Hydrogenation Tests of Novel
heterogenized Iridium-Catalysts. Zeitschrift Fur Physikalische Chemie-International
Journal of Research in Physical Chemistry & Chemical Physics. 2017;231(3):653–669.
doi:10.1515/zpch-2016-0837
apa: Gutmann, T., Alkhagani, S., Rothermel, N., Limbach, H. H., Breitzke, H., &
Buntkowsky, G. (2017). P-31-Solid-State NMR Characterization and Catalytic Hydrogenation
Tests of Novel heterogenized Iridium-Catalysts. Zeitschrift Fur Physikalische
Chemie-International Journal of Research in Physical Chemistry & Chemical
Physics, 231(3), 653–669. https://doi.org/10.1515/zpch-2016-0837
bibtex: '@article{Gutmann_Alkhagani_Rothermel_Limbach_Breitzke_Buntkowsky_2017,
title={P-31-Solid-State NMR Characterization and Catalytic Hydrogenation Tests
of Novel heterogenized Iridium-Catalysts}, volume={231}, DOI={10.1515/zpch-2016-0837},
number={3}, journal={Zeitschrift Fur Physikalische Chemie-International Journal
of Research in Physical Chemistry & Chemical Physics}, author={Gutmann, Torsten
and Alkhagani, S. and Rothermel, N. and Limbach, H. H. and Breitzke, H. and Buntkowsky,
G.}, year={2017}, pages={653–669} }'
chicago: 'Gutmann, Torsten, S. Alkhagani, N. Rothermel, H. H. Limbach, H. Breitzke,
and G. Buntkowsky. “P-31-Solid-State NMR Characterization and Catalytic Hydrogenation
Tests of Novel Heterogenized Iridium-Catalysts.” Zeitschrift Fur Physikalische
Chemie-International Journal of Research in Physical Chemistry & Chemical
Physics 231, no. 3 (2017): 653–669. https://doi.org/10.1515/zpch-2016-0837.'
ieee: 'T. Gutmann, S. Alkhagani, N. Rothermel, H. H. Limbach, H. Breitzke, and G.
Buntkowsky, “P-31-Solid-State NMR Characterization and Catalytic Hydrogenation
Tests of Novel heterogenized Iridium-Catalysts,” Zeitschrift Fur Physikalische
Chemie-International Journal of Research in Physical Chemistry & Chemical
Physics, vol. 231, no. 3, pp. 653–669, 2017, doi: 10.1515/zpch-2016-0837.'
mla: Gutmann, Torsten, et al. “P-31-Solid-State NMR Characterization and Catalytic
Hydrogenation Tests of Novel Heterogenized Iridium-Catalysts.” Zeitschrift
Fur Physikalische Chemie-International Journal of Research in Physical Chemistry
& Chemical Physics, vol. 231, no. 3, 2017, pp. 653–669, doi:10.1515/zpch-2016-0837.
short: T. Gutmann, S. Alkhagani, N. Rothermel, H.H. Limbach, H. Breitzke, G. Buntkowsky,
Zeitschrift Fur Physikalische Chemie-International Journal of Research in Physical
Chemistry & Chemical Physics 231 (2017) 653–669.
date_created: 2026-02-07T15:35:41Z
date_updated: 2026-02-17T16:18:04Z
doi: 10.1515/zpch-2016-0837
extern: '1'
intvolume: ' 231'
issue: '3'
keyword:
- Chemistry
- dynamic nuclear-polarization
- solid-state nmr
- DFT
- heterogeneous catalysis
- hydrido complexes
- hydrogenation
- immobilized catalyst
- inorganic hybrid
- iridium
- materials
- mesoporous
- molecular-orbital methods
- PHIP
- phosphine complexes
- reusable catalysts
- silica
- solid-state-NMR
- wilkinsons catalyst
language:
- iso: eng
page: 653–669
publication: Zeitschrift Fur Physikalische Chemie-International Journal of Research
in Physical Chemistry & Chemical Physics
publication_identifier:
issn:
- 0942-9352
status: public
title: P-31-Solid-State NMR Characterization and Catalytic Hydrogenation Tests of
Novel heterogenized Iridium-Catalysts
type: journal_article
user_id: '100715'
volume: 231
year: '2017'
...
---
_id: '64047'
abstract:
- lang: eng
text: A novel strategy for the immobilization of Wilkinson’s catalyst on silica
nanoparticles is presented, employing pyridyl linkers as anchoring groups. The
coordination binding of the catalyst to the pyridyl linker via ligand exchange
of the trans-phosphine group is verified by 1 D and 2 D solid-state NMR spectroscopy.
Catalytic activities are monitored by GC employing the hydrogenation of styrene
as model reaction, and the leaching properties as well as the robustness of the
catalyst are investigated. The resulting immobilized catalyst shows high catalytic
activity, which is within a factor of three comparable to the homogeneous catalyst,
and excellent stability in leaching tests. Finally, it is efficient to produce
hyperpolarization in solution by employing parahydrogen-enriched hydrogen gas
for hydrogenation.
author:
- first_name: Mohamad
full_name: Srour, Mohamad
last_name: Srour
- first_name: Sara
full_name: Hadjiali, Sara
last_name: Hadjiali
- first_name: Grit
full_name: Sauer, Grit
last_name: Sauer
- first_name: Kai
full_name: Brunnengräber, Kai
last_name: Brunnengräber
- first_name: Hergen
full_name: Breitzke, Hergen
last_name: Breitzke
- first_name: Yeping
full_name: Xu, Yeping
last_name: Xu
- first_name: Heiko
full_name: Weidler, Heiko
last_name: Weidler
- first_name: Hans-Heinrich
full_name: Limbach, Hans-Heinrich
last_name: Limbach
- first_name: Torsten
full_name: Gutmann, Torsten
id: '118165'
last_name: Gutmann
- first_name: Gerd
full_name: Buntkowsky, Gerd
last_name: Buntkowsky
citation:
ama: Srour M, Hadjiali S, Sauer G, et al. Synthesis and Solid-State NMR Characterization
of a Robust, Pyridyl-Based Immobilized Wilkinson’s Type Catalyst with High Catalytic
Performance. ChemCatChem. 2016;8(21):3409–3416. doi:10.1002/cctc.201600882
apa: Srour, M., Hadjiali, S., Sauer, G., Brunnengräber, K., Breitzke, H., Xu, Y.,
Weidler, H., Limbach, H.-H., Gutmann, T., & Buntkowsky, G. (2016). Synthesis
and Solid-State NMR Characterization of a Robust, Pyridyl-Based Immobilized Wilkinson’s
Type Catalyst with High Catalytic Performance. ChemCatChem, 8(21),
3409–3416. https://doi.org/10.1002/cctc.201600882
bibtex: '@article{Srour_Hadjiali_Sauer_Brunnengräber_Breitzke_Xu_Weidler_Limbach_Gutmann_Buntkowsky_2016,
title={Synthesis and Solid-State NMR Characterization of a Robust, Pyridyl-Based
Immobilized Wilkinson’s Type Catalyst with High Catalytic Performance}, volume={8},
DOI={10.1002/cctc.201600882},
number={21}, journal={ChemCatChem}, author={Srour, Mohamad and Hadjiali, Sara
and Sauer, Grit and Brunnengräber, Kai and Breitzke, Hergen and Xu, Yeping and
Weidler, Heiko and Limbach, Hans-Heinrich and Gutmann, Torsten and Buntkowsky,
Gerd}, year={2016}, pages={3409–3416} }'
chicago: 'Srour, Mohamad, Sara Hadjiali, Grit Sauer, Kai Brunnengräber, Hergen Breitzke,
Yeping Xu, Heiko Weidler, Hans-Heinrich Limbach, Torsten Gutmann, and Gerd Buntkowsky.
“Synthesis and Solid-State NMR Characterization of a Robust, Pyridyl-Based Immobilized
Wilkinson’s Type Catalyst with High Catalytic Performance.” ChemCatChem
8, no. 21 (2016): 3409–3416. https://doi.org/10.1002/cctc.201600882.'
ieee: 'M. Srour et al., “Synthesis and Solid-State NMR Characterization of
a Robust, Pyridyl-Based Immobilized Wilkinson’s Type Catalyst with High Catalytic
Performance,” ChemCatChem, vol. 8, no. 21, pp. 3409–3416, 2016, doi: 10.1002/cctc.201600882.'
mla: Srour, Mohamad, et al. “Synthesis and Solid-State NMR Characterization of a
Robust, Pyridyl-Based Immobilized Wilkinson’s Type Catalyst with High Catalytic
Performance.” ChemCatChem, vol. 8, no. 21, 2016, pp. 3409–3416, doi:10.1002/cctc.201600882.
short: M. Srour, S. Hadjiali, G. Sauer, K. Brunnengräber, H. Breitzke, Y. Xu, H.
Weidler, H.-H. Limbach, T. Gutmann, G. Buntkowsky, ChemCatChem 8 (2016) 3409–3416.
date_created: 2026-02-07T16:12:46Z
date_updated: 2026-02-17T16:13:06Z
doi: 10.1002/cctc.201600882
extern: '1'
intvolume: ' 8'
issue: '21'
keyword:
- heterogeneous catalysis
- hydrogenation
- immobilization
- phosphane ligands
- rhodium
language:
- iso: eng
page: 3409–3416
publication: ChemCatChem
status: public
title: Synthesis and Solid-State NMR Characterization of a Robust, Pyridyl-Based Immobilized
Wilkinson’s Type Catalyst with High Catalytic Performance
type: journal_article
user_id: '100715'
volume: 8
year: '2016'
...