Structure of cobalt sulfide phase in carbon-supported cobalt and cobalt-molybdenum sulfide catalysts

S.M.A.M. Bouwens; D.C. Koningsberger; V.H.J. Beer, de; R. Prins

doi:10.1021/bk-1989-0411.ch029

Structure of cobalt sulfide phase in carbon-supported cobalt and cobalt-molybdenum sulfide catalysts

S.M.A.M. Bouwens, D.C. Koningsberger, V.H.J. Beer, de, R. Prins

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › Academic › peer-review

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Abstract

An X-Ray absorption spectroscopy study has been carried out on a carbon-supported Co and Co-Mo sulfide catalyst, the latter consisting of a fully sulfided Co-Mo-S (type II) phase. Detailed information on the structure of the cobalt sulfide phase is obtained by comparing the EXAFS and XANES spectra of the catalysts with those of Co9S8 and CoS2 reference compounds. It is shown that the cobalt atoms in the Co-Mo-S phase have an octahedral-like sulfur coordination while the cobalt atoms in the sulfided Co/C catalyst have a larger fraction of octahedral cobalt than Co9S8. On the basis of these results, the high HDS activity of a sulfided Co/C catalyst can be understood since it appears that the structure of the cobalt sulfide phase in Co/C is in agreement with that in Co-Mo/C. In the Co-Mo-S phase, approximately one cobalt atom is in contact with one molybdenum atom at a distance of 2.85 Å.

Original language	English
Title of host publication	Characterization and catalyst development : an interactive approach
Editors	S.A. Bradley, M.J. Gattuso, R.J. Bertolacini
Place of Publication	Washington, D.C.
Publisher	American Chemical Society
Pages	319-327
ISBN (Print)	0-8412-1684-3
DOIs	https://doi.org/10.1021/bk-1989-0411.ch029
Publication status	Published - 1989
Event	conference; 196th national meeting of the American Chemical Society, Los Angeles, California, September 25 - 30, 1988; 1988-09-25; 1988-09-30 - Duration: 25 Sep 1988 → 30 Sep 1988

Publication series

Name	ACS Symposium Series
Volume	411
ISSN (Print)	0097-6156

Conference

Conference	conference; 196th national meeting of the American Chemical Society, Los Angeles, California, September 25 - 30, 1988; 1988-09-25; 1988-09-30
Period	25/09/88 → 30/09/88
Other	196th national meeting of the American Chemical Society, Los Angeles, California, September 25 - 30, 1988

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Bouwens, S. M. A. M., Koningsberger, D. C., Beer, de, V. H. J., & Prins, R. (1989). Structure of cobalt sulfide phase in carbon-supported cobalt and cobalt-molybdenum sulfide catalysts. In S. A. Bradley, M. J. Gattuso, & R. J. Bertolacini (Eds.), Characterization and catalyst development : an interactive approach (pp. 319-327). (ACS Symposium Series; Vol. 411). Washington, D.C.: American Chemical Society. https://doi.org/10.1021/bk-1989-0411.ch029

Bouwens, S.M.A.M. ; Koningsberger, D.C. ; Beer, de, V.H.J. ; Prins, R. / Structure of cobalt sulfide phase in carbon-supported cobalt and cobalt-molybdenum sulfide catalysts. Characterization and catalyst development : an interactive approach. editor / S.A. Bradley ; M.J. Gattuso ; R.J. Bertolacini. Washington, D.C. : American Chemical Society, 1989. pp. 319-327 (ACS Symposium Series).

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title = "Structure of cobalt sulfide phase in carbon-supported cobalt and cobalt-molybdenum sulfide catalysts",

abstract = "An X-Ray absorption spectroscopy study has been carried out on a carbon-supported Co and Co-Mo sulfide catalyst, the latter consisting of a fully sulfided Co-Mo-S (type II) phase. Detailed information on the structure of the cobalt sulfide phase is obtained by comparing the EXAFS and XANES spectra of the catalysts with those of Co9S8 and CoS2 reference compounds. It is shown that the cobalt atoms in the Co-Mo-S phase have an octahedral-like sulfur coordination while the cobalt atoms in the sulfided Co/C catalyst have a larger fraction of octahedral cobalt than Co9S8. On the basis of these results, the high HDS activity of a sulfided Co/C catalyst can be understood since it appears that the structure of the cobalt sulfide phase in Co/C is in agreement with that in Co-Mo/C. In the Co-Mo-S phase, approximately one cobalt atom is in contact with one molybdenum atom at a distance of 2.85 {\AA}.",

author = "S.M.A.M. Bouwens and D.C. Koningsberger and {Beer, de}, V.H.J. and R. Prins",

year = "1989",

doi = "10.1021/bk-1989-0411.ch029",

language = "English",

isbn = "0-8412-1684-3",

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Bouwens, SMAM, Koningsberger, DC, Beer, de, VHJ & Prins, R 1989, Structure of cobalt sulfide phase in carbon-supported cobalt and cobalt-molybdenum sulfide catalysts. in SA Bradley, MJ Gattuso & RJ Bertolacini (eds), Characterization and catalyst development : an interactive approach. ACS Symposium Series, vol. 411, American Chemical Society, Washington, D.C., pp. 319-327, conference; 196th national meeting of the American Chemical Society, Los Angeles, California, September 25 - 30, 1988; 1988-09-25; 1988-09-30, 25/09/88. https://doi.org/10.1021/bk-1989-0411.ch029

Structure of cobalt sulfide phase in carbon-supported cobalt and cobalt-molybdenum sulfide catalysts. / Bouwens, S.M.A.M.; Koningsberger, D.C.; Beer, de, V.H.J.; Prins, R.

Characterization and catalyst development : an interactive approach. ed. / S.A. Bradley; M.J. Gattuso; R.J. Bertolacini. Washington, D.C. : American Chemical Society, 1989. p. 319-327 (ACS Symposium Series; Vol. 411).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › Academic › peer-review

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T1 - Structure of cobalt sulfide phase in carbon-supported cobalt and cobalt-molybdenum sulfide catalysts

AU - Bouwens, S.M.A.M.

AU - Koningsberger, D.C.

AU - Beer, de, V.H.J.

AU - Prins, R.

PY - 1989

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N2 - An X-Ray absorption spectroscopy study has been carried out on a carbon-supported Co and Co-Mo sulfide catalyst, the latter consisting of a fully sulfided Co-Mo-S (type II) phase. Detailed information on the structure of the cobalt sulfide phase is obtained by comparing the EXAFS and XANES spectra of the catalysts with those of Co9S8 and CoS2 reference compounds. It is shown that the cobalt atoms in the Co-Mo-S phase have an octahedral-like sulfur coordination while the cobalt atoms in the sulfided Co/C catalyst have a larger fraction of octahedral cobalt than Co9S8. On the basis of these results, the high HDS activity of a sulfided Co/C catalyst can be understood since it appears that the structure of the cobalt sulfide phase in Co/C is in agreement with that in Co-Mo/C. In the Co-Mo-S phase, approximately one cobalt atom is in contact with one molybdenum atom at a distance of 2.85 Å.

AB - An X-Ray absorption spectroscopy study has been carried out on a carbon-supported Co and Co-Mo sulfide catalyst, the latter consisting of a fully sulfided Co-Mo-S (type II) phase. Detailed information on the structure of the cobalt sulfide phase is obtained by comparing the EXAFS and XANES spectra of the catalysts with those of Co9S8 and CoS2 reference compounds. It is shown that the cobalt atoms in the Co-Mo-S phase have an octahedral-like sulfur coordination while the cobalt atoms in the sulfided Co/C catalyst have a larger fraction of octahedral cobalt than Co9S8. On the basis of these results, the high HDS activity of a sulfided Co/C catalyst can be understood since it appears that the structure of the cobalt sulfide phase in Co/C is in agreement with that in Co-Mo/C. In the Co-Mo-S phase, approximately one cobalt atom is in contact with one molybdenum atom at a distance of 2.85 Å.

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DO - 10.1021/bk-1989-0411.ch029

M3 - Conference contribution

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T3 - ACS Symposium Series

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EP - 327

BT - Characterization and catalyst development : an interactive approach

A2 - Bradley, S.A.

A2 - Gattuso, M.J.

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PB - American Chemical Society

CY - Washington, D.C.

ER -

Bouwens SMAM, Koningsberger DC, Beer, de VHJ, Prins R. Structure of cobalt sulfide phase in carbon-supported cobalt and cobalt-molybdenum sulfide catalysts. In Bradley SA, Gattuso MJ, Bertolacini RJ, editors, Characterization and catalyst development : an interactive approach. Washington, D.C.: American Chemical Society. 1989. p. 319-327. (ACS Symposium Series). https://doi.org/10.1021/bk-1989-0411.ch029

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10.1021/bk-1989-0411.ch029