First-principles study of oxidation state and coordination of Cu-Dimers in Cu-SSZ-13 during methane-to-methanol reaction conditions
Artikel i vetenskaplig tidskrift, 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.

Författare

Unni Engedahl

Chalmers, Fysik, Kemisk fysik

Henrik Grönbeck

Chalmers, Fysik, Kemisk fysik

Anders Hellman

Chalmers, Fysik, Kemisk fysik

Journal of Physical Chemistry C

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

Vol. 123 43 26145-26150

Ämneskategorier

Oorganisk kemi

Materialkemi

Organisk kemi

DOI

10.1021/acs.jpcc.9b07954

Mer information

Senast uppdaterat

2019-11-11