Dehydrogenation of Cycloalkanes over N-Doped Carbon-Supported Catalysts: The Effects of Active Component and Molecular Structure of the Substrate

Efficient dehydrogenation of cycloalkanes under mild conditions is the key to large-scale application of cycloalkanes as a hydrogen storage medium. In this paper, a series of active metals loaded on nitrogen-doped carbon (M/CN, M = Pt, Pd, Ir, Rh, Au, Ru, Ag, Ni, Cu) were prepared to learn the role...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	Jian Wang, He Liu, Shiguang Fan, Shuai Wang, Guanjun Xu, Aijun Guo, Zongxian Wang
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	hydrogen Pt cycloalkanes dehydrogenation molecular structure Chemistry QD1-999
Acceso en línea:	https://doaj.org/article/77b6ce90e0a54179b6feb02f5cdfd645
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:doaj.org-article:77b6ce90e0a54179b6feb02f5cdfd645
record_format	dspace
spelling	oai:doaj.org-article:77b6ce90e0a54179b6feb02f5cdfd6452021-11-25T18:30:18ZDehydrogenation of Cycloalkanes over N-Doped Carbon-Supported Catalysts: The Effects of Active Component and Molecular Structure of the Substrate10.3390/nano111128462079-4991https://doaj.org/article/77b6ce90e0a54179b6feb02f5cdfd6452021-10-01T00:00:00Zhttps://www.mdpi.com/2079-4991/11/11/2846https://doaj.org/toc/2079-4991Efficient dehydrogenation of cycloalkanes under mild conditions is the key to large-scale application of cycloalkanes as a hydrogen storage medium. In this paper, a series of active metals loaded on nitrogen-doped carbon (M/CN, M = Pt, Pd, Ir, Rh, Au, Ru, Ag, Ni, Cu) were prepared to learn the role of active metals in cycloalkane dehydrogenation with cyclohexane as the model reactant. Only Pt/CN, Pd/CN, Rh/CN and Ir/CN can catalyze the dehydrogenation of cyclohexane under the set conditions. Among them, Pt/CN exhibited the best catalytic activity with the TOF value of 269.32 h<sup>−1</sup> at 180 °C, followed by Pd/CN, Rh/CN and Ir/CN successively. More importantly, the difference of catalytic activity between these active metals diminishes with the increase in temperature. This implies that there is a thermodynamic effect of cyclohexane dehydrogenation with the synthetic catalysts, which was evidenced by the study on the activation energy. In addition, the effects of molecular structure on cycloalkane dehydrogenation catalyzed by Pt/CN were studied. The results reveal that cycloalkane dehydrogenation activity and hydrogen production rate can be enhanced by optimizing the type, quantity and position of alkyl substituents on cyclohexane.Jian WangHe LiuShiguang FanShuai WangGuanjun XuAijun GuoZongxian WangMDPI AGarticlehydrogenPtcycloalkanesdehydrogenationmolecular structureChemistryQD1-999ENNanomaterials, Vol 11, Iss 2846, p 2846 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	hydrogen Pt cycloalkanes dehydrogenation molecular structure Chemistry QD1-999
spellingShingle	hydrogen Pt cycloalkanes dehydrogenation molecular structure Chemistry QD1-999 Jian Wang He Liu Shiguang Fan Shuai Wang Guanjun Xu Aijun Guo Zongxian Wang Dehydrogenation of Cycloalkanes over N-Doped Carbon-Supported Catalysts: The Effects of Active Component and Molecular Structure of the Substrate
description	Efficient dehydrogenation of cycloalkanes under mild conditions is the key to large-scale application of cycloalkanes as a hydrogen storage medium. In this paper, a series of active metals loaded on nitrogen-doped carbon (M/CN, M = Pt, Pd, Ir, Rh, Au, Ru, Ag, Ni, Cu) were prepared to learn the role of active metals in cycloalkane dehydrogenation with cyclohexane as the model reactant. Only Pt/CN, Pd/CN, Rh/CN and Ir/CN can catalyze the dehydrogenation of cyclohexane under the set conditions. Among them, Pt/CN exhibited the best catalytic activity with the TOF value of 269.32 h<sup>−1</sup> at 180 °C, followed by Pd/CN, Rh/CN and Ir/CN successively. More importantly, the difference of catalytic activity between these active metals diminishes with the increase in temperature. This implies that there is a thermodynamic effect of cyclohexane dehydrogenation with the synthetic catalysts, which was evidenced by the study on the activation energy. In addition, the effects of molecular structure on cycloalkane dehydrogenation catalyzed by Pt/CN were studied. The results reveal that cycloalkane dehydrogenation activity and hydrogen production rate can be enhanced by optimizing the type, quantity and position of alkyl substituents on cyclohexane.
format	article
author	Jian Wang He Liu Shiguang Fan Shuai Wang Guanjun Xu Aijun Guo Zongxian Wang
author_facet	Jian Wang He Liu Shiguang Fan Shuai Wang Guanjun Xu Aijun Guo Zongxian Wang
author_sort	Jian Wang
title	Dehydrogenation of Cycloalkanes over N-Doped Carbon-Supported Catalysts: The Effects of Active Component and Molecular Structure of the Substrate
title_short	Dehydrogenation of Cycloalkanes over N-Doped Carbon-Supported Catalysts: The Effects of Active Component and Molecular Structure of the Substrate
title_full	Dehydrogenation of Cycloalkanes over N-Doped Carbon-Supported Catalysts: The Effects of Active Component and Molecular Structure of the Substrate
title_fullStr	Dehydrogenation of Cycloalkanes over N-Doped Carbon-Supported Catalysts: The Effects of Active Component and Molecular Structure of the Substrate
title_full_unstemmed	Dehydrogenation of Cycloalkanes over N-Doped Carbon-Supported Catalysts: The Effects of Active Component and Molecular Structure of the Substrate
title_sort	dehydrogenation of cycloalkanes over n-doped carbon-supported catalysts: the effects of active component and molecular structure of the substrate
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/77b6ce90e0a54179b6feb02f5cdfd645
work_keys_str_mv	AT jianwang dehydrogenationofcycloalkanesoverndopedcarbonsupportedcatalyststheeffectsofactivecomponentandmolecularstructureofthesubstrate AT heliu dehydrogenationofcycloalkanesoverndopedcarbonsupportedcatalyststheeffectsofactivecomponentandmolecularstructureofthesubstrate AT shiguangfan dehydrogenationofcycloalkanesoverndopedcarbonsupportedcatalyststheeffectsofactivecomponentandmolecularstructureofthesubstrate AT shuaiwang dehydrogenationofcycloalkanesoverndopedcarbonsupportedcatalyststheeffectsofactivecomponentandmolecularstructureofthesubstrate AT guanjunxu dehydrogenationofcycloalkanesoverndopedcarbonsupportedcatalyststheeffectsofactivecomponentandmolecularstructureofthesubstrate AT aijunguo dehydrogenationofcycloalkanesoverndopedcarbonsupportedcatalyststheeffectsofactivecomponentandmolecularstructureofthesubstrate AT zongxianwang dehydrogenationofcycloalkanesoverndopedcarbonsupportedcatalyststheeffectsofactivecomponentandmolecularstructureofthesubstrate
_version_	1718411083514904576

Dehydrogenation of Cycloalkanes over N-Doped Carbon-Supported Catalysts: The Effects of Active Component and Molecular Structure of the Substrate

Ejemplares similares