Size-dependent dissociation of carbon monoxide on cobalt nanoparticles

Anders Tuxen; Sophie Carenco; Mahati Chintapalli; Cheng Hao Chuang; Carlos Escudero; Elzbieta Pach; Peng Jiang; Ferenc Borondics; Brandon Beberwyck; A. Paul Alivisatos; Geoff Thornton; Way Faung Pong; Jinghua Guo; Ruben Perez; Flemming Besenbacher; Miquel Salmeron

doi:10.1021/ja3105889

Size-dependent dissociation of carbon monoxide on cobalt nanoparticles

Anders Tuxen, Sophie Carenco, Mahati Chintapalli, Cheng Hao Chuang, Carlos Escudero, Elzbieta Pach, Peng Jiang, Ferenc Borondics, Brandon Beberwyck, A. Paul Alivisatos, Geoff Thornton, Way Faung Pong, Jinghua Guo, Ruben Perez, Flemming Besenbacher, Miquel Salmeron^*

^*Corresponding author for this work

Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaper › Journal article › Research › peer-review

214 Citations (Scopus)

Abstract

In situ soft X-ray absorption spectroscopy (XAS) was employed to study the adsorption and dissociation of carbon monoxide molecules on cobalt nanoparticles with sizes ranging from 4 to 15 nm. The majority of CO molecules adsorb molecularly on the surface of the nanoparticles, but some undergo dissociative adsorption, leading to oxide species on the surface of the nanoparticles. We found that the tendency of CO to undergo dissociation depends critically on the size of the Co nanoparticles. Indeed, CO molecules dissociate much more efficiently on the larger nanoparticles (15 nm) than on the smaller particles (4 nm). We further observed a strong increase in the dissociation rate of adsorbed CO upon exposure to hydrogen, clearly demonstrating that the CO dissociation on cobalt nanoparticles is assisted by hydrogen. Our results suggest that the ability of cobalt nanoparticles to dissociate hydrogen is the main parameter determining the reactivity of cobalt nanoparticles in Fischer-Tropsch synthesis.

Original language	English
Journal	Journal of the American Chemical Society
Volume	135
Issue	6
Pages (from-to)	2273-2278
Number of pages	6
ISSN	0002-7863
DOIs	https://doi.org/10.1021/ja3105889
Publication status	Published - 13 Feb 2013

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Tuxen, A., Carenco, S., Chintapalli, M., Chuang, C. H., Escudero, C., Pach, E., Jiang, P., Borondics, F., Beberwyck, B., Alivisatos, A. P., Thornton, G., Pong, W. F., Guo, J., Perez, R., Besenbacher, F., & Salmeron, M. (2013). Size-dependent dissociation of carbon monoxide on cobalt nanoparticles. Journal of the American Chemical Society, 135(6), 2273-2278. https://doi.org/10.1021/ja3105889

@article{1824d21cbfd84dd38da4165e99d0e76f,

title = "Size-dependent dissociation of carbon monoxide on cobalt nanoparticles",

abstract = "In situ soft X-ray absorption spectroscopy (XAS) was employed to study the adsorption and dissociation of carbon monoxide molecules on cobalt nanoparticles with sizes ranging from 4 to 15 nm. The majority of CO molecules adsorb molecularly on the surface of the nanoparticles, but some undergo dissociative adsorption, leading to oxide species on the surface of the nanoparticles. We found that the tendency of CO to undergo dissociation depends critically on the size of the Co nanoparticles. Indeed, CO molecules dissociate much more efficiently on the larger nanoparticles (15 nm) than on the smaller particles (4 nm). We further observed a strong increase in the dissociation rate of adsorbed CO upon exposure to hydrogen, clearly demonstrating that the CO dissociation on cobalt nanoparticles is assisted by hydrogen. Our results suggest that the ability of cobalt nanoparticles to dissociate hydrogen is the main parameter determining the reactivity of cobalt nanoparticles in Fischer-Tropsch synthesis.",

author = "Anders Tuxen and Sophie Carenco and Mahati Chintapalli and Chuang, {Cheng Hao} and Carlos Escudero and Elzbieta Pach and Peng Jiang and Ferenc Borondics and Brandon Beberwyck and Alivisatos, {A. Paul} and Geoff Thornton and Pong, {Way Faung} and Jinghua Guo and Ruben Perez and Flemming Besenbacher and Miquel Salmeron",

year = "2013",

month = feb,

day = "13",

doi = "10.1021/ja3105889",

language = "English",

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Tuxen, A, Carenco, S, Chintapalli, M, Chuang, CH, Escudero, C, Pach, E, Jiang, P, Borondics, F, Beberwyck, B, Alivisatos, AP, Thornton, G, Pong, WF, Guo, J, Perez, R, Besenbacher, F & Salmeron, M 2013, 'Size-dependent dissociation of carbon monoxide on cobalt nanoparticles', Journal of the American Chemical Society, vol. 135, no. 6, pp. 2273-2278. https://doi.org/10.1021/ja3105889

Size-dependent dissociation of carbon monoxide on cobalt nanoparticles. / Tuxen, Anders; Carenco, Sophie; Chintapalli, Mahati et al.
In: Journal of the American Chemical Society, Vol. 135, No. 6, 13.02.2013, p. 2273-2278.

Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaper › Journal article › Research › peer-review

TY - JOUR

T1 - Size-dependent dissociation of carbon monoxide on cobalt nanoparticles

AU - Tuxen, Anders

AU - Carenco, Sophie

AU - Chintapalli, Mahati

AU - Chuang, Cheng Hao

AU - Escudero, Carlos

AU - Pach, Elzbieta

AU - Jiang, Peng

AU - Borondics, Ferenc

AU - Beberwyck, Brandon

AU - Alivisatos, A. Paul

AU - Thornton, Geoff

AU - Pong, Way Faung

AU - Guo, Jinghua

AU - Perez, Ruben

AU - Besenbacher, Flemming

AU - Salmeron, Miquel

PY - 2013/2/13

Y1 - 2013/2/13

N2 - In situ soft X-ray absorption spectroscopy (XAS) was employed to study the adsorption and dissociation of carbon monoxide molecules on cobalt nanoparticles with sizes ranging from 4 to 15 nm. The majority of CO molecules adsorb molecularly on the surface of the nanoparticles, but some undergo dissociative adsorption, leading to oxide species on the surface of the nanoparticles. We found that the tendency of CO to undergo dissociation depends critically on the size of the Co nanoparticles. Indeed, CO molecules dissociate much more efficiently on the larger nanoparticles (15 nm) than on the smaller particles (4 nm). We further observed a strong increase in the dissociation rate of adsorbed CO upon exposure to hydrogen, clearly demonstrating that the CO dissociation on cobalt nanoparticles is assisted by hydrogen. Our results suggest that the ability of cobalt nanoparticles to dissociate hydrogen is the main parameter determining the reactivity of cobalt nanoparticles in Fischer-Tropsch synthesis.

AB - In situ soft X-ray absorption spectroscopy (XAS) was employed to study the adsorption and dissociation of carbon monoxide molecules on cobalt nanoparticles with sizes ranging from 4 to 15 nm. The majority of CO molecules adsorb molecularly on the surface of the nanoparticles, but some undergo dissociative adsorption, leading to oxide species on the surface of the nanoparticles. We found that the tendency of CO to undergo dissociation depends critically on the size of the Co nanoparticles. Indeed, CO molecules dissociate much more efficiently on the larger nanoparticles (15 nm) than on the smaller particles (4 nm). We further observed a strong increase in the dissociation rate of adsorbed CO upon exposure to hydrogen, clearly demonstrating that the CO dissociation on cobalt nanoparticles is assisted by hydrogen. Our results suggest that the ability of cobalt nanoparticles to dissociate hydrogen is the main parameter determining the reactivity of cobalt nanoparticles in Fischer-Tropsch synthesis.

U2 - 10.1021/ja3105889

DO - 10.1021/ja3105889

M3 - Journal article

C2 - 23339635

AN - SCOPUS:84873644045

SN - 0002-7863

VL - 135

SP - 2273

EP - 2278

JO - Journal of the American Chemical Society

JF - Journal of the American Chemical Society

IS - 6

ER -

Size-dependent dissociation of carbon monoxide on cobalt nanoparticles

Abstract

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