TY - JOUR
T1 - Highly selective bimetallic Pt-Cu/Mg(Al)O catalysts for the aqueous-phase reforming of glycerol
AU - Boga, D.A.
AU - Oord, R.
AU - Beale, A.M.
AU - Chung, Y.M.
AU - Bruijnincx, P.C.A.
AU - Weckhuysen, B.M.
PY - 2013
Y1 - 2013
N2 - Monometallic Pt and bimetallic Pt-Cu catalysts supported on
Mg(Al)O mixed oxides, obtained by calcination of the corresponding
layered double hydroxides (LDHs), were prepared
and tested in the aqueous-phase reforming (APR) of glycerol.
The effect of the Mg/Al ratio and calcination temperature of
the LDH support, as well as the effect of varying Pt and Cu
amounts on glycerol reforming, was investigated. The use of
a basic support increases the selectivity to hydrogen and the
use of a Pt-Cu bimetallic catalyst results in a decrease in alkane
formation. The 0.9 wt.% Pt-0.4 wt.% Cu/Mg(Al)O_2.95 catalyst
system with an Mg(Al)O mixed oxide support obtained by the
calcination of the corresponding LDH material with Mg/Al ratio
of 2.95 at 673 K, showed higher hydrogen selectivity (55.3%)
and lower methane production (1.9%) after 5 h reaction than
the benchmark Pt/Al2O3 catalyst (49.4% and 5.6%, respectively).
Catalyst characterization by extended X-ray absorption fine
structure (EXAFS) spectroscopy showed a bimetallic interaction
between Pt and Cu. The bimetallic interaction is thought to be
responsible for the lowered methane formation and, ultimately,
the high hydrogen selectivity observed.
AB - Monometallic Pt and bimetallic Pt-Cu catalysts supported on
Mg(Al)O mixed oxides, obtained by calcination of the corresponding
layered double hydroxides (LDHs), were prepared
and tested in the aqueous-phase reforming (APR) of glycerol.
The effect of the Mg/Al ratio and calcination temperature of
the LDH support, as well as the effect of varying Pt and Cu
amounts on glycerol reforming, was investigated. The use of
a basic support increases the selectivity to hydrogen and the
use of a Pt-Cu bimetallic catalyst results in a decrease in alkane
formation. The 0.9 wt.% Pt-0.4 wt.% Cu/Mg(Al)O_2.95 catalyst
system with an Mg(Al)O mixed oxide support obtained by the
calcination of the corresponding LDH material with Mg/Al ratio
of 2.95 at 673 K, showed higher hydrogen selectivity (55.3%)
and lower methane production (1.9%) after 5 h reaction than
the benchmark Pt/Al2O3 catalyst (49.4% and 5.6%, respectively).
Catalyst characterization by extended X-ray absorption fine
structure (EXAFS) spectroscopy showed a bimetallic interaction
between Pt and Cu. The bimetallic interaction is thought to be
responsible for the lowered methane formation and, ultimately,
the high hydrogen selectivity observed.
U2 - 10.1002/cctc.201200112
DO - 10.1002/cctc.201200112
M3 - Article
SN - 1867-3880
VL - 5
SP - 529
EP - 537
JO - ChemCatChem
JF - ChemCatChem
IS - 2
ER -