期刊
NANO RESEARCH
卷 14, 期 12, 页码 4828-4832出版社
TSINGHUA UNIV PRESS
DOI: 10.1007/s12274-021-3436-6
关键词
photothermal CO2 hydrogenation; Ni-based catalysts; layered double hydroxide; photocatalysis; solar-to-fuel
类别
资金
- National Key Projects for Fundamental Research and Development of China [2018YFB1502002, 2017YFA0206904, 2017YFA0206900]
- National Natural Science Foundation of China [51825205, 51772305, 21871279, 21902168, 52072382]
- Beijing Natural Science Foundation [2191002, 2194089]
- Strategic Priority Research Program of the Chinese Academy of Sciences [XDB17000000]
- Royal Society-Newton Advanced Fellowship [NA170422]
- International Partnership Program of Chinese Academy of Sciences [GJHZ1819, GJHZ201974]
- K. C. Wong Education Foundation
- Central China Normal University [2020YBZZ019]
- Youth Innovation Promotion Association of the CAS
- Open Fund of the Key Laboratory of Thermal Management and Energy Utilization of Aircraft, Ministry of Industry and Information Technology, Nanjing University of Aeronautics and Astronautics [CEPE2020014]
The study successfully fabricated a series of Ni-based catalysts for efficient conversion of CO2 to methane via photothermal CO2 reduction. The Ni-600 catalyst exhibited high CO2 conversion rate, methane production rate, and long-term stability, offering new potential for sustainable conversion and utilization of CO2.
Photothermal CO2 reduction is an efficient and sustainable catalytic path for CO2 treatment. Here, we successfully fabricated a novel series of Ni-based catalysts (Ni-x) via H-2 reduction of NiAl-layered double hydroxide nanosheets at temperatures (x) ranging from 300 to 600 degrees C. With the increase of the reduction temperature, the methane generation rate of the Ni-x catalyst for photothermal CO2 hydrogenation gradually increased under ultraviolet-visible-infrared (UV-vis-IR) irradiation in a flow-type system. The Ni-600 catalyst showed a CO2 conversion of 78.4%, offering a CH4 production rate of 278.8 mmol.g(-1)h(-1), with near 100% selectivity and 100 h long-term stability. Detailed characterization analyses showed metallic Ni nanoparticles supported on amorphous alumina are the catalytically active phase for CO2 methanation. This study provides a possibility for large-scale conversion and utilization of CO2 from a sustainable perspective.
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