Adsorbed carbon monoxide — FTIR absorption peaks and assignments
These are the characteristic FTIR wavenumbers where Adsorbed carbon monoxide tends to absorb, compiled from published literature and ranked by supporting evidence. Each assignment is traceable to a source (DOI) and cross-validated against our 130,000+ reference spectra and knowledge graph.
Backed by 8 cited sources
Quick answer
Adsorbed carbon monoxide is usually assigned by looking for a recurring cluster of characteristic peaks rather than one exact textbook number. The table below shows where the literature most often places this group in FTIR, ranked by accumulated evidence.
Characteristic FTIR peaks for Adsorbed carbon monoxide
| Wavenumber (cm⁻¹) | Supporting facts | Cited sources | Top confidence |
|---|---|---|---|
| 2100 | 7 | 4 | 1.0 |
| 2000 | 5 | 3 | 1.0 |
| 669 | 4 | 4 | 1.0 |
| 2181 | 4 | 4 | 1.0 |
| 1900 | 4 | 3 | 1.0 |
| 2050 | 4 | 3 | 1.0 |
| 2115 | 4 | 2 | 1.0 |
| 2060 | 3 | 2 | 1.0 |
| 2079 | 3 | 1 | 1.0 |
| 2040 | 2 | 2 | 1.0 |
| 2080 | 2 | 2 | 1.0 |
| 2173 | 2 | 2 | 1.0 |
| 3650 | 2 | 2 | 1.0 |
| 2070 | 2 | 2 | 1.0 |
| 2186 | 2 | 2 | 1.0 |
| 2130 | 2 | 2 | 1.0 |
| 2065 | 2 | 2 | 1.0 |
| 2010 | 2 | 2 | 1.0 |
| 2141 | 2 | 2 | 1.0 |
| 2113 | 2 | 2 | 1.0 |
| 1760 | 2 | 1 | 1.0 |
| 2140 | 2 | 1 | 1.0 |
| 2119 | 2 | 1 | 1.0 |
| 2178 | 2 | 1 | 1.0 |
| 2170 | 2 | 1 | 1.0 |
| 2156 | 2 | 1 | 1.0 |
| 2200 | 2 | 1 | 1.0 |
| 2112 | 2 | 1 | 1.0 |
| 2035 | 2 | 1 | 1.0 |
| 2124 | 2 | 1 | 1.0 |
Showing the 30 best-supported peaks of 149 total for Adsorbed carbon monoxide.
Spectrum logic
A functional-group assignment becomes more confident when several expected bands appear together. Use this page to find the strongest-supported peaks, then confirm that the same sample exhibits a coherent pattern rather than a single isolated hit.
Real-world usage
These pages are useful for unknown material analysis, peak explanation in reports, polymer troubleshooting, and verifying whether a candidate material family is chemically plausible.
Common mistakes
- Using one functional-group page as a complete material verdict without checking the rest of the spectrum.
- Assuming the strongest band is always the most diagnostic one.
- Forgetting that processing, additives, aging, and mixtures can shift or broaden expected peaks.
Verification advice
Use DSC, GC-MS, or TGA when several material families share similar bands or when mixture effects make the FTIR assignment uncertain.
Literature behind these assignments
-
2400 cm⁻¹ confidence 1.0
“The deformation band of C=O at around and absorption peaks ob2400cm(cid:2)1 served ordinary between 2300 and due to adsorbed CO molecules in air are absent in our”
Mn doped ZnO nanostructured thin films prepared by ultrasonic spray pyrolysis method DOI: 10.1016/j.spmi.2012.06.023 -
2082 cm⁻¹ confidence 1.0
“FTIR cm-1 of 1% Pt/CeO shows a strongly adsorbed CO peak at 2082 corresponding to oxidized Pt.”
Bera 等 - 2003 - Promoting effect of CeO2 in combustion synthesized DOI: 10.1021/jp022132f -
2091 cm⁻¹ confidence 1.0
“Results of CO adsorbed on atop sites on Pt/SiO 2 2 cm)1 includes: an peak at 2091 a peak at 2080 and a peak at 2067 indicating three kinds of adsorption sites for a b c dissociative hydrogen on Pt/SiO 2.”
Chen 等 - 2005 - Infrared study of benzene hydrogenation on PtSiO2 DOI: 10.1007/s10562-005-8684-7 -
1611 cm⁻¹ confidence 1.0
“comparetothatobservedonpuregalliumorceriumoxides.Inaddition to the bands mentioned above, the spectrum of CO adsorbed on CeGa-IC shows intense and sharp bands at 1611, 1390, and 1216cm-1, similar to those observed in the CO-Ga 2O spectrum.”
Effect of gallia doping on the acid⠍base and redox properties of ceria DOI: 10.1016/j.apcata.2010.08.050 -
2088 cm⁻¹ confidence 1.0
“1997, 1880, and 1651 The observed peaks at 2088 and cm(cid:3)1 1880 are characteristic of CO adsorbed on different species of reflecting the decrease of the population of adsorption sites as a Pt0.Accordingtoliteraturedata,thesmallcarbonyls”
CO oxidation and 4-nitrophenol reduction over ceria-promoted platinum nanoparticles impregnated with ZSM-5 zeolite DOI: 10.1016/j.jre.2021.07.009 -
2120 cm⁻¹ confidence 1.0
“over Pt/SiO 2 Otherauthors,however,eitherhavenotobservedapeak The oxidation of carbon monoxide is one of the most incm¡1 at all (1, 12) or have not observed the peak to at 2120 tensely studied reactions in the history of catalysis.”
Fanson 等 - 2001 - Island formation during kinetic rate oscillations DOI: 10.1006/jcat.2001.3369 -
2115 cm⁻¹ confidence 1.0
“DRIFTS results on 2 cm-1 bands at 2115 and 2173 are indicative of linearly adsorbed CO adsorption using in situ FTIR (DRIFTS) was used to probe the on metallic gold [5] and the titania support [29], respectively, CO”
Gaur 等 - 2013 - CO oxidation studies over cluster-derived AuTiO2 DOI: 10.1016/j.cattod.2012.10.029 -
2340 cm⁻¹ confidence 1.0
“(A) Changes in the IR peak at around 2100 after switching to a flow of 2.5% O and (B) corresponding changes in the peak 2 cm-1, intensity (curve b) and intensity of the adsorbed CO peak (2340 curve a).”
In Situ Transient FTIR and XANES Studies of the Evolution of Surface Species in CO Oxidation on Au/TiO<sub>2</sub> DOI: 10.1021/jp0568733
See Adsorbed carbon monoxide in your own spectrum
Upload your FTIR spectrum and get a full interpretation report — peak assignments with literature citations, library matches, and a literature-backed analysis — in seconds.