TY - JOUR

T1 - Roles of Cu2+ and Cu+ sites in ethene transformation on copper-modified ZSM-5 zeolite

AU - Lashchinskaya, Zoya N.

AU - Kampf, Inga A.

AU - Gabrienko, Anton A.

AU - Stepanov, Alexander G.

N1 - Zoya N. Lashchinskaya, Inga A. Kampf, Anton A. Gabrienko, Alexander G. Stepanov, Roles of Cu2+ and Cu+ sites in ethene transformation on copper-modified ZSM-5 zeolite, Microporous and Mesoporous Materials, Volume 414, 2026, 114322, ISSN 1387-1811, https://doi.org/10.1016/j.micromeso.2026.114322. This work was supported by the Russian Science Foundation (grant no. 25-13-00070). The maintenance of solid-state NMR facilities was supported by the Ministry of Science and Higher Education of the Russian Federation within the governmental assignment for Boreskov Institute of Catalysis (project FWUR-2024-0032). The authors are deeply grateful to Dr. Svetlana A. Yashnik from Boreskov Institute of Catalysis for the Cu/H-ZSM-5 sample preparation and to Dr. Igor E. Soshnikov from Boreskov Institute of Catalysis for the help with EPR measurements.

PY - 2026/10

Y1 - 2026/10

N2 - With the aim of studying the properties of copper-modified zeolites for light alkene conversion to higher alkenes, aromatic hydrocarbons, and oxygenates, the transformation of ethene on ZSM-5 zeolite samples modified predominantly with Cu2+ or Cu + sites has been investigated. The defining role of copper sites has been established by comparing the alkene reaction on Cu/H-ZSM-5 and H-ZSM-5 zeolites. Solid-state NMR and FTIR spectroscopic monitoring helped to identify the key surface intermediates, including ethene π-complexes with Cu2+ and Cu + sites, butadiene, and butene isomers. Using EPR spectroscopy, it has been obtained that Cu2+ sites were reduced to Cu + throughout ethene transformation on Cu/H-ZSM-5. The mechanisms of ethene dimerization, oligomerization, and aromatization with the assistance of Cu2+ and Cu + sites have been suggested. The results obtained will be of practical value for the development of light alkene valorization technologies.

AB - With the aim of studying the properties of copper-modified zeolites for light alkene conversion to higher alkenes, aromatic hydrocarbons, and oxygenates, the transformation of ethene on ZSM-5 zeolite samples modified predominantly with Cu2+ or Cu + sites has been investigated. The defining role of copper sites has been established by comparing the alkene reaction on Cu/H-ZSM-5 and H-ZSM-5 zeolites. Solid-state NMR and FTIR spectroscopic monitoring helped to identify the key surface intermediates, including ethene π-complexes with Cu2+ and Cu + sites, butadiene, and butene isomers. Using EPR spectroscopy, it has been obtained that Cu2+ sites were reduced to Cu + throughout ethene transformation on Cu/H-ZSM-5. The mechanisms of ethene dimerization, oligomerization, and aromatization with the assistance of Cu2+ and Cu + sites have been suggested. The results obtained will be of practical value for the development of light alkene valorization technologies.

KW - Легкий алкен

KW - Этен

KW - Медьсодержащий цеолит

KW - ZSM-5

KW - π-комплекс

KW - Механизм реакции

KW - Ароматизация

KW - ИК-спектроскопия

KW - ЯМР-спектроскопия в твердом состоянии

KW - Light alkene

KW - Ethene

KW - Copper-modified zeolite

KW - ZSM-5

KW - π-complex

KW - Reaction mechanism

KW - Aromatization

KW - FTIR spectroscopy

KW - Solid-state NMR spectroscopy

UR - https://www.mendeley.com/catalogue/67b8cac0-5a6c-35ff-8d09-69a2962fd9e2/

UR - https://www.scopus.com/pages/publications/105045185569

U2 - 10.1016/j.micromeso.2026.114322

DO - 10.1016/j.micromeso.2026.114322

M3 - Article

VL - 414

JO - Microporous and Mesoporous Materials

JF - Microporous and Mesoporous Materials

SN - 1387-1811

M1 - 114322

ER -