Premium
Tethering of Dinuclear Complexes to SBA‐15 and Their Application in CO 2 Hydrogenation
Author(s) -
Morgan Grace G.,
Fennell Kevin,
Kishore M. Jhansi L.,
Sullivan James A.
Publication year - 2013
Publication title -
chemcatchem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.497
H-Index - 106
eISSN - 1867-3899
pISSN - 1867-3880
DOI - 10.1002/cctc.201200167
Subject(s) - bimetallic strip , chemistry , thermogravimetric analysis , catalysis , amine gas treating , mesoporous material , alkyl , inorganic chemistry , homoleptic , bet theory , fourier transform infrared spectroscopy , mesoporous silica , nuclear chemistry , polymer chemistry , medicinal chemistry , organic chemistry , chemical engineering , engineering , metal
Two bimetallic cryptates (containing Cu and Co), which have previously been shown to react with and activate atmospheric CO 2 , were tethered to modified mesoporous SiO 2 and their activities in promoting the CO 2 +H 2 reaction has been analysed. The cryptates were tethered to C 3 H 6 Cl‐modified SBA‐15 through a condensation reaction between surface alkyl chlorides and 2° amines of the ligands, which released HCl and formed 3° amine linkages. The materials were characterised using BET, thermogravimetric analysis, FTIR and elemental analysis and their activities in promoting the CO 2 +H 2 reaction was tested under batch reactor conditions. Co ions appear to selectively populate the medal sites of the tethered ligands whereas Cu ions appear to deposit on the surface as Cu(BF 4 ) 2 salts. The composite materials generate CO and CH 4 from the CO 2 +H 2 mixtures. Co‐containing catalysts are more effective than their Cu analogues in promoting the reaction.