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- W4310798188 abstract "It is challenging to fabricate supported Ni catalysts with more active sites to improve their low-temperature catalytic performance in CO2 methanation. Herein, firstly, ultrathin (∼4 nm) NiZrAl layered double hydroxide (LDH) nanosheets were synthesized by co-precipitation method, followed by aqueous miscible organic solvent treatment (AMOST), and applied as catalyst precursors for CO2 methanation. After H2 reduction, the surface area of Ni particles in NiZrAl-LDH-AMO-R was significantly higher than that of NiZrAl-LDH-R without AMOST. As a result, the NiZrAl-LDH-AMO-R showed higher catalytic activity than NiZrAl-LDH-R owing to its higher H2 and CO2 chemisorption capacity and lower activation energy. During the 100 h-lifetime test, NiZrAl-LDH-AMO-R maintained a steady CO2 conversion of about 92.3%. Moreover, NiZrAl-LDH-AMO-R maintained its catalytic activity after a 600 °C-hydrothermal treatment, suggesting its high stability. In situ DRIFTS results reveal that CO2 methanation on both NiZrAl-LDH-R and NiZrAl-LDH-AMO-R followed the HCOO∗ route. Interestingly, more active sites obtained after AMOST strongly promoted the generation and decomposition of HCOO∗, and thus significantly improved the activity of NiZrAl-LDH-AMO-R at low temperatures." @default.
- W4310798188 created "2022-12-18" @default.
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- W4310798188 date "2023-02-01" @default.
- W4310798188 modified "2023-10-14" @default.
- W4310798188 title "Ultrathin NiZrAl layered double hydroxide nanosheets derived catalyst for enhanced CO2 methanation" @default.
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- W4310798188 doi "https://doi.org/10.1016/j.ijhydene.2022.11.062" @default.
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