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Subsurface‐Controlled CO 2 Selectivity of PdZn Near‐Surface Alloys in H 2 Generation by Methanol Steam Reforming
Author(s) -
Rameshan Christoph,
Stadlmayr Werner,
Weilach Christian,
Penner Simon,
Lorenz Harald,
Hävecker Michael,
Blume Raoul,
Rocha Tulio,
Teschner Detre,
KnopGericke Axel,
Schlögl Robert,
Memmel Norbert,
Zemlyanov Dmitry,
Rupprechter Günther,
Klötzer Bernhard
Publication year - 2010
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.200905815
Subject(s) - monolayer , alloy , methanol , bifunctional , materials science , catalysis , selectivity , steam reforming , chemical engineering , metallurgy , chemistry , nanotechnology , organic chemistry , hydrogen production , engineering
More than skin deep : In spite of their identical 1:1 surface composition, the geometric and electronic structures of a multilayer and monolayer PdZn surface alloy are different, as are their catalytic selectivities. The CO 2 selective multilayer alloy features surface ensembles of PdZn exhibiting a “Zn‐up/Pd‐down” corrugation (see picture). These act as “bifunctional” active sites both for water activation and for the conversion of methanol into CO 2 . On the monolayer alloy CO and not CO 2 is produced.