FTIR study of CO and NO adsorption and coadsorption on a Cu/SiO2 catalyst: Probing the oxidation state of copper

Literature Information

Publication Date 2001-02-15
DOI 10.1039/B009649K
Impact Factor 3.676
Authors

H. Knözinger


View Original

Abstract

At room temperature CO is adsorbed strongly on Cu+ sites (band at 2131 cm−1) whereas NO is preferably adsorbed on Cu2+ sites (band at 1882 cm−1). Coadsorption of CO and NO allows simultaneous and selective detection of both kinds of cations. This observation is used to follow the changes on the sample surface occurring in the presence of oxygen. Addition of small amounts of O2 to the CO–NO–Cu/SiO2 system first leads to the oxidation of the Cu+ sites to Cu2+. This process is followed by formation of surface nitrates which block the Cu2+ sites for NO adsorption. Adsorption of CO at 85 K allows detection of Cu2+ cations (ca. 2200 cm−1) in addition to the Cu+, CO is replaced by NO from these sites. Cu0 sites form carbonyls which, when copper is highly dispersed, can absorb at the same frequency at which Cu+–CO carbonyls are detected. In this case both kinds of species could be distinguished by their stability: the Cu0–CO species are easily destroyed during evacuation.

Related Literature

Rapid survey of nuclear quadrupole resonance by broadband excitation with comb modulation and dual-mode acquisition

Yuta Hibe, Yasuto Noda, K. Takegoshi, Kazuyuki Takeda

2020-10-28 Paper

DOI: 10.1039/D0CP05309K

Vacancies in graphene: an application of adiabatic quantum optimization

Virginia Carnevali, Ilaria Siloi, Marco Fornari

2020-10-30 Paper

DOI: 10.1039/D0CP04037A

Fast charging with high capacity for aluminum rechargeable batteries using organic additive in an ionic liquid electrolyte

Yeseul Park, Danbi Lee, Jongmin Kim, Gibaek Lee, Yongsug Tak

2020-12-08 Communication

DOI: 10.1039/D0CP05050D

VUV excited-state dynamics of cyclic ethers as a function of ring size

Anders B. Skov, Rune Lausten

2020-10-27 Paper

DOI: 10.1039/D0CP04292G

Born–Oppenheimer molecular dynamics simulations on structures of high-density and low-density water: a comparison of the SCAN meta-GGA and PBE GGA functionals

Mengli Li, Lu Chen, Lirong Gui, Shuo Cao, Di Liu, Gang Zhao, Mingcui Ding, Jinliang Yan, Dehua Wang

2020-12-23 Paper

DOI: 10.1039/D0CP05707J

DRACON: disconnected graph neural network for atom mapping in chemical reactions

Filipp Nikitin, Olexandr Isayev, Vadim Strijov

2020-11-05 Paper

DOI: 10.1039/D0CP04748A

Preferential location of zirconium dopants in cerium dioxide nanoparticles and the effects of doping on their reducibility: a DFT study

Iskra Z. Koleva, Hristiyan A. Aleksandrov, Georgi N. Vayssilov

2020-11-17 Paper

DOI: 10.1039/D0CP05456A

Threshold photoionization shows no sign of nitryl hydride in methane oxidation with nitric oxide

Martin Hoener, Andras Bodi, Patrick Hemberger, Torsten Endres, Tina Kasper

2020-12-10 Paper

DOI: 10.1039/D0CP04924G

Electromagnetic control of spin ordered Mn3 qubits: a density functional study

Zahra Hooshmand, Mark R. Pederson

2020-09-28 Paper

DOI: 10.1039/D0CP04455E

You might also like

Compound Q&A

Are there alternatives to 1-(4-Chlorophenyl)-N-hydroxymethanimine (CAS: 3848-36-0) in synthesis?

When considering alternatives to 1-(4-Chlorophenyl)-N-hydroxymethanimine (CAS: 3...

3848-36-01-(4-Chlorophenyl)-N...
Compound Q&A

How is 3-(4-Bromophenyl)-5-(2-fluorophenyl)-1,2,4-oxadiazole (CAS: 419553-16-5) typically synthesized?

3-(4-Bromophenyl)-5-(2-fluorophenyl)-1,2,4-oxadiazole is synthesized through a m...

419553-16-53-(4-Bromophenyl)-5-...
Compound Q&A

How is 5-Chloro-2-(4-chlorophenyl)-4-methyl-6-[3-(1-piperidinyl)propoxy]pyrimidine (CAS: 1639220-19-1) typically synthesized?

5-Chloro-2-(4-chlorophenyl)-4-methyl-6-[3-(1-piperidinyl)propoxy]pyrimidine (CAS...

1639220-19-15-Chloro-2-(4-chloro...
Compound Q&A

What industries use 2-Chloro-4-(difluoromethoxy)pyridine (CAS: 1206978-15-5)?

2-Chloro-4-(difluoromethoxy)pyridine is used in the pharmaceutical industry for ...

1206978-15-52-Chloro-4-(difluoro...
Compound Q&A

What regulatory guidelines apply to 3-Chloro-6-methylpyridazine (CAS: 1121-79-5)?

3-Chloro-6-methylpyridazine (CAS: 1121-79-5) is classified under the Globally Ha...

1121-79-53-Chloro-6-methylpyr...
Compound Q&A

Are there alternatives to Methyl 4,5-dimethyl-2-nitrobenzoate in synthesis?

Several alternatives can be used in the synthesis of Methyl 4,5-dimethyl-2-nitro...

90922-74-0Methyl 4,5-dimethyl-...
Compound Q&A

Are there alternatives to (2E,2'E)-3,3'-(1,4-Phenylene)bisacrylaldehyde in synthesis?

Alternatives to (2E,2'E)-3,3'-(1,4-Phenylene)bisacrylaldehyde include other acry...

63405-68-5(2E,2'E)-3,3'-(1,4-P...
Compound Q&A

What is 3-Amino-5-chloropyridin-2-ol hydrochloride (CAS: 1261906-29-9)?

3-Amino-5-chloropyridin-2-ol hydrochloride is an organic compound with the CAS n...

1261906-29-93-Amino-5-chloropyri...
Compound Q&A

What precautions should be taken when handling 6,7-Difluoro-2,3-dihydro-4H-chromen-4-one (CAS: 1092349-93-3)?

When handling 6,7-Difluoro-2,3-dihydro-4H-chromen-4-one, it is essential to wear...

1092349-93-36,7-Difluoro-2,3-dih...

Source Journal

Physical Chemistry Chemical Physics

Physical Chemistry Chemical Physics
CiteScore: 5.5
Self-citation Rate: 10.3%
Articles per Year: 3036

Physical Chemistry Chemical Physics (PCCP) is an international journal co-owned by 19 physical chemistry and physics societies from around the world. This journal publishes original, cutting-edge research in physical chemistry, chemical physics and biophysical chemistry. To be suitable for publication in PCCP, articles must include significant innovation and/or insight into physical chemistry; this is the most important criterion that reviewers and Editors will judge against when evaluating submissions. The journal has a broad scope and welcomes contributions spanning experiment, theory, computation and data science. Topical coverage includes spectroscopy, dynamics, kinetics, statistical mechanics, thermodynamics, electrochemistry, catalysis, surface science, quantum mechanics, quantum computing and machine learning. Interdisciplinary research areas such as polymers and soft matter, materials, nanoscience, energy, surfaces/interfaces, and biophysical chemistry are welcomed if they demonstrate significant innovation and/or insight into physical chemistry. Joined experimental/theoretical studies are particularly appreciated when complementary and based on up-to-date approaches.

Recommended Compounds

Recommended Suppliers

Disclaimer
This page provides academic journal information for reference and research purposes only. We are not affiliated with any journal publishers and do not handle publication submissions. For publication-related inquiries, please contact the respective journal publishers directly.
If you notice any inaccuracies in the information displayed, please contact us at support@chemtradehub.com. We will promptly review and address your concerns.