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Highly dispersed MgInCe-mixed metal oxides catalyzed direct carbonylation of glycerol and CO_(2)into glycerol carbonate
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作者 Xufang Chen Xin Shu +5 位作者 Yanru Zhu Jian Zhang zhigang chai Hongyan Song Zhe An Jing He 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2024年第8期153-163,共11页
Glycerol carbonate,an important glycerol value-added product,has been widely used as an active intermediate and inert solvent in the synthesis of cosmetics,detergents,chemical intermediates,polymers,and so on.The dire... Glycerol carbonate,an important glycerol value-added product,has been widely used as an active intermediate and inert solvent in the synthesis of cosmetics,detergents,chemical intermediates,polymers,and so on.The direct carbonylation from glycerol with CO_(2)is considered a promising route,but still tough work due to the thermodynamic stability and the kinetic inertness of CO_(2).In this work,highlyselective direct carbonylation of glycerol and CO_(2)into glycerol carbonate has been achieved over highly dispersed MgInCe-mixed metal oxides(MgInCe-MMO),which were prepared through the topological transformation derived from the MgInCe-layered double hydroxides(MgInCe-LDHs).By precisely modulating the surface basic-acidic properties and the oxygen vacancies,an efficient carbonylation of glycerol with CO_(2)has been achieved with a selectivity of up to>99%to glycerol carbonate.Deep investigation into the synergistic catalysis of base-acid sites and oxygen vacancies has been clarified. 展开更多
关键词 Catalytic reaction engineering Glycerol carbonate Direct carbonylation from glycerol Carbon dioxide Mixed metal oxides Synergistic catalysis
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Cobalt-based hydroxide nanoparticles @ N-doping carbonic frameworks core-shell structures as highly efficient bifunctional electrocatalysts for oxygen evolution and oxygen reduction reactions 被引量:6
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作者 Shiqiang Feng Cheng Liu +2 位作者 zhigang chai Qi Li Dongsheng Xu 《Nano Research》 SCIE EI CAS CSCD 2018年第3期1482-1489,共8页
The development of highly efficient and earth-abundant oxygen evolution/ reduction reaction (OER/ORR) catalysts is essential for rechargeable metal-air batteries. Herein, cobalt-based hydroxide nanoparticles @ N-dop... The development of highly efficient and earth-abundant oxygen evolution/ reduction reaction (OER/ORR) catalysts is essential for rechargeable metal-air batteries. Herein, cobalt-based hydroxide nanoparticles @ N-doping carbonic framework (CoOHCat@NCF) core-shell structures have been designed as highly stable and efficient OER/ORR bifunctional catalysts. The obtained composite shows enhanced catalytic activities and excellent stability in alkaline media. In the OER, a high turnover frequency (2.03 s^-1 at an overpotential of 0.36 V), low overpotential at high current density (100 mA.cm-2 requiring an overpotential of 0.38 V), and excellent stability (100 mA·cm^-2 for one week with no activity loss) have been achieved. Furthermore, although cobalt species-based catalysts are known as good ORR catalysts, their hybridization with NCF obtained from metal organic frameworks successfully enhanced their ORR activities. The efficient activity of CoOHCat@NCF as a bifunctional oxygen electrocatalyst can be ascribed to the core-shell structures stabilizing the active catalytic sites and the porous shell structure favoring electrocatalysis-related mass transport. 展开更多
关键词 core-shell structure cobalt-based hydroxidenanoparticles @ N-dopingcarbonic framework(CoOHCat@NCF) bifunctional electrocatalyst oxygen evolution reaction oxygen reduction reaction
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Core-shell CdS@ZIF-8 structures for improved selectivity in photocatalytic H2 generation from formic acid 被引量:11
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作者 Min Zeng zhigang chai +4 位作者 Xin Deng Qi Li Shiqiang Feng Juan Wang Dongsheng Xu 《Nano Research》 SCIE EI CAS CSCD 2016年第9期2729-2734,共6页
关键词 METAL-ORGANIC frameworks (MOFs) cadmium sulfide CORE-SHELL PHOTOCATALYTIC H2 GENERATION formic acid SELECTIVITY
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