期刊
CHEMCATCHEM
卷 13, 期 22, 页码 4770-4779出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/cctc.202101284
关键词
catalyst stability; heterogeneous catalysis; microstructure; nanocatalysts; nickel
资金
- Portuguese Foundation for Science and Technology (FCT) [SFRH/BD/128986/2017]
- Associate Laboratory LSRE-LCM - national funds through FCT/MCTES (PIDDAC) [UIDB/50020/2020]
- FCT [PTDC/NAN-MAT/28745/2017]
- US DOE [DE-FE0031878]
- Oak Ridge National Laboratory [10609]
- Fundação para a Ciência e a Tecnologia [PTDC/NAN-MAT/28745/2017, SFRH/BD/128986/2017] Funding Source: FCT
The study demonstrated the successful application of conductive-carbon-supported Ni-based electrocatalysts in the heterogeneous catalysis of CO2 methanation, with the monometallic Ni/C material showing excellent performance with high CO2 conversion rate and CH4 selectivity.
The cost-effectiveness and excellent performance of conductive-carbon-supported Ni-based electrocatalysts make them attractive materials for hydrogen oxidation and evolution reactions. However, they were previously unused in gas-phase hydrogenation reactions. In this work, we have expanded the applicability of commercially available advanced Ni/C, NiMo/C and NiRe/C materials from electrocatalysis to heterogeneous catalysis of CO2 methanation. Our catalytic testing efforts indicate that the monometallic Ni/C material demonstrates the best CO2 methanation properties, achieving an excellent CO2 conversion of 83 % at 400 degrees C with nearly complete selectivity to CH4 of 99.7 %, plus exhibiting intact performance during 90 h of time-on-stream testing. Such catalytic properties are among the highest reported to date among carbon-supported Ni-based methanation catalysts. Excellent performance of Ni/C stems from the good dispersion of the Ni nanoparticles over N-containing carbon support material.
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