Citation: Runran WANG, Qiyue JIAO, Ruifang LI, Hong WANG, Hongwei WANG, Yali BAO, Qi WANG, Xiaoyan WANG. Influence of the loading methods of Ni species in Ni/CeO₂ catalysts on the performance of CO methanation[J]. Chinese Journal of Inorganic Chemistry, ;2026, 42(5): 1026-1038. doi: 10.11862/CJIC.20250364 shu

Influence of the loading methods of Ni species in Ni/CeO₂ catalysts on the performance of CO methanation

Runran WANG ^{1, #} ,
Qiyue JIAO ^{2, #} ,
Ruifang LI ¹ ,
Hong WANG ¹ ,
Hongwei WANG ¹ ,
Yali BAO ¹ ,
Qi WANG ^1,, ,
Xiaoyan WANG ^1,,

1.
College of Chemical Engineering, Inner Mongolia University of Technology, Hohhot 010051, China
2.
Emergency Management Department of Inner Mongolia Autonomous Region, Hohhot 010051, China

Corresponding author: Qi WANG, qiwang127@imut.edu.cn Xiaoyan WANG, rain20030000072@imut.edu.cn
Received Date: 8 December 2025
Revised Date: 5 March 2026

Figures(9)

To enhance the low-temperature activity and anti-sintering performance of Ni-based catalysts for CO methanation, mesoporous CeO₂ supports with a confined structure were synthesized via a hydrothermal method. The effects of three Ni loading methods—incipient wetness impregnation, co-precipitation, and bis(cyclopentadienyl)nickel sublimation—on catalytic performance were systematically compared. Characterization techniques, including X-ray diffraction (XRD), N₂ adsorption-desorption test, hydrogen temperature-programmed reduction (H₂-TPR), X-ray photoelectron spectroscopy (XPS), and transmission electron microscopy (TEM), revealed the critical influence of the loading method on Ni species dispersion, particle size, and metal-support interaction. The results indicated that all three mesoporous Ni/CeO₂ catalysts exhibited excellent anti-sintering properties due to the confinement effect of the support. However, their low-temperature activities differed significantly, primarily determined by the specific state of Ni. In the NC-B catalyst prepared by bis(cyclopentadienyl)nickel sublimation, the interaction between Ni species and the support was relatively weak. After reduction, this method yielded highly dispersed metallic Ni nanoparticles, increasing the number of low-temperature active sites. Consequently, the NC-B catalyst achieved 98% CO conversion rate and 100% CH₄ selectivity at 300 ℃, demonstrating the optimal low-temperature methanation performance.
- CO methanation,
- CeO₂,
- Ni-based catalyst,
- anti-sintering,
- metal-support interaction
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沈阳化工大学材料科学与工程学院沈阳 110142

Influence of the loading methods of Ni species in Ni/CeO2 catalysts on the performance of CO methanation

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通讯作者: 陈斌, bchen63@163.com

Influence of the loading methods of Ni species in Ni/CeO₂ catalysts on the performance of CO methanation