TY - JOUR
T1 - Hydrogenolysis of CO bond over Re-modified Ir catalyst in alkane solvent
AU - Nakagawa, Yoshinao
AU - Mori, Kazuma
AU - Chen, Kaiyou
AU - Amada, Yasushi
AU - Tamura, Masazumi
AU - Tomishige, Keiichi
N1 - Funding Information:
This work is supported by the Cabinet Office, Government of Japan through its “Funding Program for Next Generation World-Leading Researchers”. Authors appreciate Prof. Tokushi Kizuka (Univ. of Tsukuba) for TEM observation of the catalyst.
PY - 2013
Y1 - 2013
N2 - Hydrogenolysis of alcohols was carried out using n-heptane solvent and IrReOx/SiO2 catalyst, which has been known to be active in water solvent. Hydrogenolysis of trans-1,2-cyclohexanediol proceeded more smoothly in n-heptane than in water. The maximum yield of cyclohexanol was 74%, and at longer reaction time cyclohexane was selectively formed (>80% yield). Stronger adsorption of substrate on catalyst surface in n-heptane than in water is one of factors in obtaining the good yields. Alkane solvent was also advantageous to water solvent in hydrogenolysis of mono-alcohols. The reaction route via acid-catalyzed dehydration and subsequent hydrogenation is enhanced in alkane solvent. On the other hand, the "direct" hydrogenolysis driven by the hydride-like species is suppressed in alkane solvent, leading lower activity in n-heptane for hydrogenolysis of tetrahydrofurfuryl alcohol or 1,2-hexanediol, which smoothly react over IrReOx/SiO2 catalyst in water.
AB - Hydrogenolysis of alcohols was carried out using n-heptane solvent and IrReOx/SiO2 catalyst, which has been known to be active in water solvent. Hydrogenolysis of trans-1,2-cyclohexanediol proceeded more smoothly in n-heptane than in water. The maximum yield of cyclohexanol was 74%, and at longer reaction time cyclohexane was selectively formed (>80% yield). Stronger adsorption of substrate on catalyst surface in n-heptane than in water is one of factors in obtaining the good yields. Alkane solvent was also advantageous to water solvent in hydrogenolysis of mono-alcohols. The reaction route via acid-catalyzed dehydration and subsequent hydrogenation is enhanced in alkane solvent. On the other hand, the "direct" hydrogenolysis driven by the hydride-like species is suppressed in alkane solvent, leading lower activity in n-heptane for hydrogenolysis of tetrahydrofurfuryl alcohol or 1,2-hexanediol, which smoothly react over IrReOx/SiO2 catalyst in water.
KW - Alcohol
KW - Hydrogenolysis
KW - Iridium
KW - Rhenium
KW - Solvent effect
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U2 - 10.1016/j.apcata.2013.09.021
DO - 10.1016/j.apcata.2013.09.021
M3 - Article
AN - SCOPUS:84885013372
SN - 0926-860X
VL - 468
SP - 418
EP - 425
JO - Applied Catalysis A: General
JF - Applied Catalysis A: General
ER -