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• W4311185323 endingPage "126914" @default.
• W4311185323 startingPage "126914" @default.
• W4311185323 abstract "Nickel-based catalysts exhibit excellent initial activity in the auto-thermal reforming (ATR) of acetic acid (HAc) to produce hydrogen; meanwhile, deactivation issues, namely oxidation, sintering and carbon deposition, have not been fully addressed. Hence, we prepared a series of Ni–W/SiO2 catalysts and found the Ni-2W/SiO2 catalyst with 2 wt% W decoration presented the best catalytic activity and stability: the conversion rate of acetic acid was stable at 100 %, and the hydrogen yield remained at 2.8 mol-H2/mol-HAc with neither sintering nor carbon deposition. The excellent catalytic performance of Ni-2W/SiO2 was analyzed and can be attributed to the special properties of WO2 as followed: First, during the ATR process, WO2 species migrated to the surface of Ni phase and formed an interface, which resulted in strong interaction of WO2-Ni and relieved carbon deposition and sintering of Ni species; Second, the effect of electron donor by WO2 species on the WO2-Ni interface during the reduction procedure was found and preserved a stable proportion of Ni0 active species during the ATR process; Third, DFT and in-situ DRIFTS confirmed that CH3COOH tends to be enriched on the WO2 species of the WO2/Ni(1 1 1) interface rather than on the Ni(1 1 1) surface, promoting the adsorption and dehydrogenation of CH3COOH to intermediates of CH3COO* and H*, which is difficult to occur on WO3 species of the WO3/Ni(1 1 1) interface because of high reaction barrier." @default.
• W4311185323 created "2022-12-24" @default.
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• W4311185323 date "2023-05-01" @default.
• W4311185323 modified "2023-10-18" @default.
• W4311185323 title "Additive WO2 promotes Ni - based catalyst for hydrogen production from auto-thermal reforming of acetic acid" @default.
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• W4311185323 doi "https://doi.org/10.1016/j.fuel.2022.126914" @default.
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