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IR Signature of Size‐Selective CO 2 Activation on Small Platinum Cluster Anions, Pt n − ( n =4–7)
Author(s) -
Green Alice E.,
Justen Jasmin,
Schöllkopf Wieland,
Gentleman Alexander S.,
Fielicke André,
Mackenzie Stuart R.
Publication year - 2018
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.201809099
Subject(s) - dissociation (chemistry) , platinum , cluster (spacecraft) , chemistry , bond dissociation energy , infrared spectroscopy , activation energy , density functional theory , cluster size , binding energy , metal , analytical chemistry (journal) , atomic physics , computational chemistry , molecular dynamics , physics , catalysis , organic chemistry , computer science , programming language
Infrared multiple photon dissociation spectroscopy (IR‐MPD) has been employed to determine the nature of CO 2 binding to size‐selected platinum cluster anions, Pt n − ( n =4–7). Interpreted in conjunction with density functional theory simulations, the results illustrate that the degree of CO 2 activation can be controlled by the size of the metal cluster, with dissociative activation observed on all clusters n ≥5. Of potential practical significance, in terms of the use of CO 2 as a useful C1 feedstock, CO 2 is observed molecularly‐bound, but highly activated, on the Pt 4 − cluster. It is trapped behind a barrier on the reactive potential energy surface which prevents dissociation.