Mechanism for Solid-State Ion-Exchange of Cu+ into Zeolites
Journal article, 2016

Density functional theory calculations are used to investigate solid-state ion-exchange of copper into zeolites. In particular, the energetic conditions for functionalization of Chabazite (CHA) with copper ions from Cu2O(111) via formation of Cu(NH3)2+ is explored. It is found that the diamine complexes form easily on Cu2O(111) and diffuse with low barriers over the surface and in the CHA framework. The charge neutrality of the systems is maintained via counter diffusion of H+ in the form of NH4+ from the zeolite to the Cu2O surface where water can be formed. The efficient solvation of Cu+ and H+ by ammonia renders the ion-exchange process exothermic. The present results highlight the dynamic character of the Cu-ion sites and provide means to understand zeolite functionalization.

Author

Lin Chen

Chalmers, Physics, Chemical Physics

Jonas Jansson

Magnus Skoglundh

Competence Centre for Catalysis (KCK)

Chalmers, Chemistry and Chemical Engineering, Applied Chemistry, Applied Surface Chemistry

Henrik Grönbeck

Competence Centre for Catalysis (KCK)

Chalmers, Physics, Chemical Physics

Journal of Physical Chemistry C

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

Vol. 120 51 29182-29189

Subject Categories

Physical Sciences

DOI

10.1021/acs,jpcc.6b09553

More information

Created

10/8/2017