First-principles study of oxidation state and coordination of Cu-Dimers in Cu-SSZ-13 during methane-to-methanol reaction conditions
Journal article, 2019

Direct methane-to-methanol conversion is a dream reaction which presently can be realized via a three-step cycle over copper-exchanged zeolites; an activation phase, a reaction phase, and finally an extraction phase. Here we use ab initio molecular dynamics and first-principles thermodynamics to examine oxidation state and coordination of Cu-dimers in Cu-SSZ-13 under relevant experimental conditions. A multitude of Cu2(HxOy) clusters are exergonic at room temperature. However, at the relevant reaction conditions only Cu2O and Cu2(OH) remain as thermodynamically stable structures for the activation and extraction phase, respectively.

Author

Unni Engedahl

Chalmers, Physics, Chemical Physics

Henrik Grönbeck

Chalmers, Physics, Chemical Physics

Anders Hellman

Chalmers, Physics, Chemical Physics

Journal of Physical Chemistry C

1932-7447 (ISSN) 1932-7455 (eISSN)

Vol. 123 43 26145-26150

Subject Categories

Inorganic Chemistry

Materials Chemistry

Organic Chemistry

Areas of Advance

Nanoscience and Nanotechnology (SO 2010-2017, EI 2018-)

Energy

Materials Science

Infrastructure

C3SE (Chalmers Centre for Computational Science and Engineering)

DOI

10.1021/acs.jpcc.9b07954

More information

Latest update

7/27/2020