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A Mesopore-Confined and Graphene Oxide-Localized Ruthenium CatalystIncreases Rates of Mid-Chain Polyolefin Hydrogenolysis
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| 其它 | A catalyst architecture with mesoporous silica coating Ru nanoparticles on reduced graphene oxide (mSiO2/Ru/rGO) localizes the 2 nm Ru solely at the closed bottoms of 2.9 nm diameter mesopores. mSiO2/Ru/rGO catalyzes the rapid, selective hydrogenolysis of polyolefins at wax formation rates (νwax) up to 1700 gwax·gRu–1·h–1 and a turnover frequency (TOF) for C–C bond cleavage of 130 ± 8 min–1. The νwax and TOF for mSiO2/Ru/rGO are 23× and 16× those of nonporous Ru/rGO, respectively, indicating that faster chain cleavage is also more selective inside mesopores. The methane yield from mSiO2/Ru/rGO is ca. 30% of the value obtained from Ru/rGO. Methane decreases, and wax selectivity improves with narrow-pore (2.3 nm) mSiO2/Ru/rGO. The reaction rate decreases at lower and higher H2 pressures from its maximum at 37 bar. |
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(2025-6-4)
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