The Impact of Ni Species Nature on Low‐Temperature CO2 Methanation Over CeZrOx/Ni Catalysts.
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| Title: | The Impact of Ni Species Nature on Low‐Temperature CO |
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| Authors: | Guo, Jiawei1,2 (AUTHOR), Yang, Jinhai1 (AUTHOR), Song, Yan3,4 (AUTHOR), Luo, Jing1 (AUTHOR) luojing@sxicc.ac.cn, Zhao, Ning1 (AUTHOR) zhaoning@sxicc.ac.cn, Xiao, Fukui1 (AUTHOR) xiaofk@sxicc.ac.cn |
| Source: | ChemCatChem. 1/15/2026, Vol. 18 Issue 1, p1-12. 12p. |
| Subjects: | Nickel compounds, Nickel catalysts, Catalytic activity, Carbon oxides, Carbon dioxide, Low temperature engineering |
| Abstract: | The efficacy of hydrogen activation by Ni species is a critical determinant of the catalytic performance in CO2 methanation. Herein, the nature of Ni species in CeZrOx/Ni was modulated by altering the calcination atmosphere. The CeZrOx/Ni─O demonstrated excellent low‐temperature methanation activity, achieving a CO2 conversion of 94.3% at 225°C. This value is 5.8 times higher than that of the CeZrOx/Ni─N. The characterization results indicated that Ni species formed in oxygen‐containing atmospheres exhibited high dispersion, which facilitated the formation of Ni–MOx interfaces and thereby promoted the activation of CO2 and H2. In contrast, under oxygen‐free conditions, Ni species formed a strong interaction with oxygen atoms from CeZrOx, which suppressed the activation of H2. In situ DRIFT spectra demonstrated that the reaction involved dual pathways, namely the formate pathway and the CO pathway. The abundant Ni–O–M interfaces substantially enhanced CO2 adsorption and conversion to formate species, thereby establishing the formate pathway as dominant. [ABSTRACT FROM AUTHOR] |
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| Database: | Engineering Source |
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