期刊
CHEMSUSCHEM
卷 14, 期 4, 页码 1074-1081出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/cssc.202002557
关键词
heterogeneous catalysis; hydrogen; immobilization; iridium; vapor-phase reaction
资金
- JSPS KAKENHI [JP19H02715, JP19H05053]
A new method for continuous hydrogen production from a simple methanol-water solution under vapor-phase flow has been developed, catalyzed by an anionic iridium bipyridonate (Ir-bpyd) complex immobilized on periodic mesoporous organosilica. This method overcomes the critical problems related to homogeneous catalysts, such as base consumption and catalyst deactivation.
CO-free hydrogen production from methanol and water by using transition metal complex catalysts has attracted increasing attention. However, liquid-phase batch reactions using homogeneous catalysts are impractical for large-scale operations, owing to the consumption of bases and the use of organic solvents or additives. This study concerns a novel method for continuous hydrogen production from a simple methanol-water solution under vapor-phase flow. The reaction is catalyzed by an anionic iridium bipyridonate (Ir-bpyd) complex immobilized on a periodic mesoporous organosilica. The liquid-phase batch reaction using homogeneous anionic Ir-bpyd complex is immediately deactivated, owing to CO2 generation, whereas no catalyst deactivation is observed in the vapor-phase flow reaction because CO2 is smoothly removed from the catalyst bed, enabling continuous hydrogen production without the addition of a base. Thus, the critical problems pertaining to homogeneous catalysts are overcome.
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