Journal
ADVANCED MATERIALS
Volume 30, Issue 36, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adma.201803127
Keywords
CO hydrogenation; Fe-based catalysts; layered double hydroxides; light olefins; photocatalysis
Categories
Funding
- National Key R&D Program of China [2016YFB0600901, 2017YFA0206904, 2017YFA0206900, 2017YFB0602200]
- National Basic Research Program of China [2014CB239402]
- National Natural Science Foundation of China [51772305, 51572270, U1662118, 31671489, 51861135101, 21725301, 91645115, 21673273, 21473229, 91545121]
- 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]
- Young Elite Scientist Sponsorship Program by CAST [YESS20160137]
- Youth Innovation Promotion Association of the CAS
- National Thousand Young Talents Program of China
- Hundred-Talent Program of Chinese Academy of Sciences
- Shanxi Hundred-Talent Program
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Conversion of syngas (CO, H-2) to hydrocarbons, commonly known as the Fischer-Tropsch (FT) synthesis, represents a fundamental pillar in today's chemical industry and is typically carried out under technically demanding conditions (1-3 MPa, 300-400 degrees C). Photocatalysis using sunlight offers an alternative and potentially more sustainable approach for the transformation of small molecules (H2O, CO, CO2, N-2, etc.) to high-valuable products, including hydrocarbons. Herein, a novel series of Fe-based heterostructured photocatalysts (Fe-x) is successfully fabricated via H-2 reduction of ZnFeAl-layered double hydroxide (LDH) nanosheets at temperatures (x) in the range 300-650 degrees C. At a reduction temperature of 500 degrees C, the heterostructured photocatalyst formed (Fe-500) consists of Fe-0 and FeOx nanoparticles supported by ZnO and amorphous Al2O3 center dot Fe-500 demonstrates remarkable CO hydrogenation performance with very high initial selectivities toward hydrocarbons (89%) and especially light olefins (42%), and a very low selectivity towards CO2 (11%). The intimate and abundant interfacial contacts between metallic Fe-0 and FeOx in the Fe-500 photocatalyst underpins its outstanding photocatalytic performance. The photocatalytic production of high-value light olefins with suppressed CO2 selectivity from CO hydrogenation is demonstrated here.
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