Active State of the LaCoO3 Catalyst. A Reply to the Comment, “Hydrogenolysis and Hydrogenation of Ethylene on LaCoO3”

IchimuraKenji,; InoueYasunobu,; YasumoriIwao,

doi:10.1246/bcsj.55.2313

Cited by 6 publications

(4 citation statements)

References 8 publications

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“…Since Pedersen and Libby 171 first reported that ACoO 3 (A = lanthanide elements) oxides are more active than some transition metals for the hydrogenolysis of cis -2-butene, many other hydrogenation reactions have been carried out on perovskite oxides. Among these, the use of cobaltites for hydrogenolysis of various alkanes − and ethylene ,, remain prominent.…”

Section: Hydrogenation and Hydrogenolysis Reactionsmentioning

confidence: 99%

“…The reaction of C 2 H 4 with H 2 on LaCoO 3 below 420 K yields only the hydrogenated product C 2 H 6 , whereas above this reaction temperature the hydrogenolysis of C 2 H 4 forms CH 4 in addition to the hydrogenation. The hydrogenolysis of C 3 −C 5 alkanes such as propane, butane, isobutane, pentane, isopentane, and neopentane on LaCoO 3 produces only CH 4 . , Neither the corresponding alkenes nor the fragmented hydrocarbons are formed in the gas phase. The reaction order with respect to the hydrocarbon pressure is unity for all reactions, while the hydrogen order increases with the number of carbon atoms involved in the reactant hydrocarbons.…”

Section: Hydrogenation and Hydrogenolysis Reactionsmentioning

confidence: 99%

“…The hydrogenolysis of C 3 -C 5 alkanes such as propane, butane, isobutane, pentane, isopentane, and neopentane on LaCoO 3 produces only CH 4 . 291,292 Neither the corresponding alkenes nor the fragmented hydrocarbons are formed in the gas phase. The reaction order with respect to the hydrocarbon pressure is unity for all reactions, while the hydrogen order increases with the number of carbon atoms involved in the reactant hydrocarbons.…”

Section: Hydrogenation and Hydrogenolysis Reactionsmentioning

confidence: 99%

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Chemical Structures and Performance of Perovskite Oxides

2001

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He obtained his Ph.D. in chemistry in 1990 at the same university, working under the supervision of Dr. L. Gonza ´lez Tejuca and Prof. J. L. G. Fierro at the Institute of Catalysis and Petrochemistry (CSIC). From 1990 to 1993, he was working under contract in a project of oxidative coupling of methane funded by REPSOL (the largest Spanish oil and petrochemisty company). At the end of this period, he got a staff position of researcher in the Institute of Catalysis and Petrochemisty, that is his current status. In 1996−1997, he was a Visiting Scholar in the group of Prof. A. Varma, at the University of Notre Dame (USA). He has been the Head of the Department of Sturcture and Reactivity of the Institute of Catalysis and Petrochemistry since 1998. His research interests are focused mainly in catalytic processes for clean energy production, specifically in catalytic applications of perovskite oxides (Ph.D. dissertation), natural gas conversion, catalytic combustion, C 1 chemistry, catalyic membrane reactors, hydrogen production, and fuel cell catalysts. He has published 30 papers and 3 patents and made 22 presentations at symposia and conferences.

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Section: Hydrogenation and Hydrogenolysis Reactionsmentioning

confidence: 99%

Section: Hydrogenation and Hydrogenolysis Reactionsmentioning

confidence: 99%

Section: Hydrogenation and Hydrogenolysis Reactionsmentioning

confidence: 99%

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Chemical Structures and Performance of Perovskite Oxides

2001

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“…Figure6. TGA and DTGA thermograms of the catalysts prepared: (a) LaujSrjMnOs, (b) Lai-xSrjFeOs, (c) Lai-iSr,CoOs, (d) Lai^,Sr,Ni03.Note that the ordinate scale of each figure is different.…”

mentioning

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Catalytic properties of lanthanum strontium transition metal oxides (La1-xSrxBO3; B = manganese, iron, cobalt, nickel) for toluene oxidation

Liang¹,

Weng²

1993

Ind. Eng. Chem. Res.

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Cooperative Co⁰/Co^II Sites Stabilized by a Perovskite Matrix Enable Selective C−O and C−C bond Hydrogenolysis of Oxygenated Arenes

et al. 2019

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Strontium-substituted lanthanum cobaltite( La 0.8 Sr 0.2 CoO 3 ) matrix-stabilized Co 0 /Co II catalytic sites were prepared, which presentt unable CÀOa nd CÀCh ydrogenolysis activity for the vapor-phase upgrading of oxygenated arenes.C o II sites associated with oxygen vacancies were favored at low temperatures and performed selective CÀOh ydrogenolysis, in whichS r-substitutionf acilitated oxygen vacancy formation, leading to approximately 10 times higher reactivity compared to undoped LaCoO 3 .C o 0 sites were favored at high temperatures and performed extensive CÀCb ond hydrogenolysis, generating aw ide range of alkanes. The lower reaction order with P H 2 (1.1 AE 0.1) for CÀCh ydrogenolysis than for CÀOh ydrogenolysis (2.0 AE 0.1) led to ah igh selectivity towards CÀChydrogenolysis at low P H 2 . The Co 3 O 4 surfaces featured an arrower temperature window for obtaining the respective optimal Co II andC o 0 pairs compared to analogous perovskite surfaces;w hereas, the perovskite matrix stabilizes these pairs for selectiveC ÀOa nd CÀC hydrogenolysis. This stabilization effecto ffers an additional handle to control reactivity in oxide catalysts.[a] Dr.M.S hetty,P rof. D. Zanchet,P rof.Supporting Information and the ORCID identification number(s) for the author(s) of this article can be found under: https://doi.

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Active State of the LaCoO3 Catalyst. A Reply to the Comment, “Hydrogenolysis and Hydrogenation of Ethylene on LaCoO3”

Cited by 6 publications

References 8 publications

Chemical Structures and Performance of Perovskite Oxides

Chemical Structures and Performance of Perovskite Oxides

Catalytic properties of lanthanum strontium transition metal oxides (La1-xSrxBO3; B = manganese, iron, cobalt, nickel) for toluene oxidation

Cooperative Co⁰/Co^II Sites Stabilized by a Perovskite Matrix Enable Selective C−O and C−C bond Hydrogenolysis of Oxygenated Arenes

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Active State of the LaCoO3 Catalyst. A Reply to the Comment, “Hydrogenolysis and Hydrogenation of Ethylene on LaCoO3”

Cited by 6 publications

References 8 publications

Chemical Structures and Performance of Perovskite Oxides

Chemical Structures and Performance of Perovskite Oxides

Catalytic properties of lanthanum strontium transition metal oxides (La1-xSrxBO3; B = manganese, iron, cobalt, nickel) for toluene oxidation

Cooperative Co0/CoII Sites Stabilized by a Perovskite Matrix Enable Selective C−O and C−C bond Hydrogenolysis of Oxygenated Arenes

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Cooperative Co⁰/Co^II Sites Stabilized by a Perovskite Matrix Enable Selective C−O and C−C bond Hydrogenolysis of Oxygenated Arenes