TY - JOUR
T1 - Selective and Stable Non-Noble-Metal Intermetallic Compound Catalyst for the Direct Dehydrogenation of Propane to Propylene
AU - He, Yang
AU - Song, Yuanjun
AU - Cullen, David A.
AU - Laursen, Siris
N1 - Publisher Copyright:
Copyright © 2018 American Chemical Society
PY - 2018/10/31
Y1 - 2018/10/31
N2 - A non-noble intermetallic compound catalyst consisting of Ni3Ga nanoparticles supported on Al2O3that exhibits high selectivity (∼94%), comparable activity (TOF = 4.7 × 10-2s-1), good stability (∼94% to 81% over the 82 h test), and regenerability in the direct dehydrogenation of propane to propylene at 600 °C has been developed. Through synthesis techniques that stabilize the Ni3Ga phase, the surface composition of the catalytic nanoparticles could be tuned by Ni and Ga loading such that improved selectivity toward propylene may be achieved. Comparisons with well-defined silica-supported Ni3Ga and NiGa catalysts and Ni3Ga/Al2O3with a range of Ni:Ga loading suggested that a specific surface composition range was most promising for propylene production. The presence of Ni at the active particle surface was also found to be critical to drive dehydrogenation and enhance conversion, whereas the presence of Ga was necessary to attenuate the reactivity of the surface to improve selectivity and catalyst stability.
AB - A non-noble intermetallic compound catalyst consisting of Ni3Ga nanoparticles supported on Al2O3that exhibits high selectivity (∼94%), comparable activity (TOF = 4.7 × 10-2s-1), good stability (∼94% to 81% over the 82 h test), and regenerability in the direct dehydrogenation of propane to propylene at 600 °C has been developed. Through synthesis techniques that stabilize the Ni3Ga phase, the surface composition of the catalytic nanoparticles could be tuned by Ni and Ga loading such that improved selectivity toward propylene may be achieved. Comparisons with well-defined silica-supported Ni3Ga and NiGa catalysts and Ni3Ga/Al2O3with a range of Ni:Ga loading suggested that a specific surface composition range was most promising for propylene production. The presence of Ni at the active particle surface was also found to be critical to drive dehydrogenation and enhance conversion, whereas the presence of Ga was necessary to attenuate the reactivity of the surface to improve selectivity and catalyst stability.
UR - http://www.scopus.com/inward/record.url?scp=85055639507&partnerID=8YFLogxK
U2 - 10.1021/jacs.8b05060
DO - 10.1021/jacs.8b05060
M3 - Article
C2 - 30346723
AN - SCOPUS:85055639507
SN - 0002-7863
VL - 140
SP - 14010
EP - 14014
JO - Journal of the American Chemical Society
JF - Journal of the American Chemical Society
IS - 43
ER -