DOI: 10.1063/1.438159. Infrared spectroscopic study of activated surface processes: CO chemisorption on supported Rh

Infrared spectroscopic study of activated surface processes: CO chemisorption on supported Rh

10.1063/1.438159

Crossref journal-article

AIP Publishing

The Journal of Chemical Physics (317)

Abstract

The infrared spectrum of CO chemisorbed on alumina-supported Rh surfaces has been studied following chemisorption at cryogenic temperatures. Major differences are observed in the distribution and spectroscopic character of chemisorbed CO species produced at low temperatures (110–170 K) compared to chemisorbed CO species produced on Rh at 295 K. It has been found that the species Rh(CO)2, formed on isolated Rh sites, is produced rapidly via an activated chemisorption process above ∼200 K. On more ’’crystalline’’ Rhx sites, containing chemisorbed CO, an activated CO adsorbate-conversion process has been detected in which ?CO decreases by ∼50 cm−1 on warming the adsorbed layer above ∼265 K. Isotopic exchange between 13CO(g) and 12CO(ads) has been shown to occur rapidly at low temperature (∼200 K) for Rh(CO)2 species, whereas Rhx(CO) species exchange rapidly only at higher temperatures (≳250 K). These results, taken together, serve to confirm a model in which isolated Rh sites coexist on the alumina support with crystalline Rhx sites; the two kinds of sites are separable on the basis of the spectroscopic character of the chemisorbed CO species they adsorb as well as by means of their chemical properties.

Bibliography

Yates, J. T., Duncan, T. M., & Vaughan, R. W. (1979). Infrared spectroscopic study of activated surface processes: CO chemisorption on supported Rh. The Journal of Chemical Physics, 71(10), 3908â3915.

Authors 3

John T. Yates (first)
T. Michael Duncan (additional)
Robert W. Vaughan (additional)

References 21 Referenced 103

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10.1063/1.437603 / J. Chem. Phys. (1979)
10.1063/1.437604 / J. Chem. Phys. (1979)
10.1039/f19787402570 / J. Chem. Soc. Faraday Trans. 1 (1978)
10.1016/0021-9517(79)90042-3 / J. Catal. (1979)
10.1021/j150557a013 / J. Phys. Chem. (1957)
10.1016/0021-9517(76)90300-6 / J. Catal. (1976)
10.1063/1.435657 / J. Chem. Phys. (1978)
10.1063/1.437485 / J. Chem. Phys. (1979)
10.1016/0039-6028(78)90367-9 / Surf. Sci. (1978)
10.1021/ja00827a013 / J. Am. Chem. Soc. (1974)
{'key': '2024020918300142100_r11'}
{'key': '2024020918300142100_r12'}
{'key': '2024020918300142100_r12a', 'first-page': '213', 'volume': '2', 'year': '1974', 'journal-title': 'Jpn. J. Appl. Phys. Suppl.'} / Jpn. J. Appl. Phys. Suppl. (1974)
10.1016/0039-6028(74)90230-1 / Surf. Sci. (1974)
{'key': '2024020918300142100_r13a'}
{'key': '2024020918300142100_r14', 'first-page': '199', 'volume': '84', 'year': '1979', 'journal-title': 'Surf. Sci.'} / Surf. Sci. (1979)
10.1103/PhysRevLett.41.1307 / Phys. Rev. Lett. (1978)
10.1016/0021-9517(70)90275-7 / J. Catal. (1970)
{'key': '2024020918300142100_r17'}

Dates

Type	When
Created	22 years, 6 months ago (Feb. 27, 2003, 4:39 p.m.)
Deposited	1 year, 6 months ago (Feb. 9, 2024, 3:33 p.m.)
Indexed	4 weeks, 1 day ago (Aug. 7, 2025, 4:52 a.m.)
Issued	45 years, 9 months ago (Nov. 15, 1979)
Published	45 years, 9 months ago (Nov. 15, 1979)
Published Print	45 years, 9 months ago (Nov. 15, 1979)

Funders 0

None

BibTeX

@article{Yates_1979, title={Infrared spectroscopic study of activated surface processes: CO chemisorption on supported Rh}, volume={71}, ISSN={1089-7690}, url={http://dx.doi.org/10.1063/1.438159}, DOI={10.1063/1.438159}, number={10}, journal={The Journal of Chemical Physics}, publisher={AIP Publishing}, author={Yates, John T. and Duncan, T. Michael and Vaughan, Robert W.}, year={1979}, month=nov, pages={3908–3915} }

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