Photothermal catalytic dry reforming performance of methane over Ni-Co bimetallic spinel oxides: synergistic effects and structural tuning

XIONG Dan; BAI Zhihao; YU Shouwu; MENG Xianguang

doi:10.19976/j.cnki.43-1448/TF.2025080

Materials Science and Engineering of Powder Metallurgy >

2026 , Vol. 31 >Issue 3: 245 - 255

DOI: https://doi.org/10.19976/j.cnki.43-1448/TF.2025080

Engineering and Technology

Photothermal catalytic dry reforming performance of methane over Ni-Co bimetallic spinel oxides: synergistic effects and structural tuning

XIONG Dan ,
BAI Zhihao ,
YU Shouwu ,
MENG Xianguang

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1. College of Materials Science and Engineering, North China University of Science and Technology, Tangshan 063210, China;
2. School of Physical Sciences, Great Bay University, Dongguan 523000, China

Received date: 2025-11-24

Revised date: 2026-03-15

Online published: 2026-07-03

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Abstract

Photothermal catalytic dry reforming of methane represents an efficient route for utilizing solar energy to drive the conversion of greenhouse gases CH₄ and CO₂ into syngas (H₂ and CO). In this work, a series of Ni_xCo_yMgAlO (x=1, 0.9, 0.8, 0.7, 0.6, 0.5; y=0, 0.1, 0.2, 0.3, 0.4, 0.5) spinel oxide catalysts with varying Ni/Co molar ratios were synthesized via a co-precipitation method. The crystalline structure, oxygen vacancy concentration, micro-morphology, and redox properties of the catalysts were systematically analyzed by characterization methods such as SEM, EDS, XRD, and XPS. Their photothermal catalytic activity and stability in dry reforming of methane were evaluated, investigating the effect of the Ni/Co ratio on catalytic performance. The results indicate that the Ni_0.5Co_0.5MgAlO catalyst exhibits optimal performance, achieving CH₄ and CO₂ conversions of 59.6% and 65.3%, respectively, under photothermal conditions. Co doping effectively modulates the specific surface area, oxygen vacancy concentration, and metal-support interaction, leading to improved catalytic activity and enhanced resistance to carbon deposition. The synergistic effect between Ni and Co can facilitate electron transfer, strengthen the redox capability, promote oxygen species cycling, and optimize the activation of CH₄ and CO₂, thereby further enhancing the photothermal catalytic performance.

Key words： methane; carbon dioxide; dry reforming; photothermal catalysis; Ni-Co bimetallic; spinel oxide

Cite this article

XIONG Dan , BAI Zhihao , YU Shouwu , MENG Xianguang . Photothermal catalytic dry reforming performance of methane over Ni-Co bimetallic spinel oxides: synergistic effects and structural tuning[J]. Materials Science and Engineering of Powder Metallurgy, 2026 , 31(3) : 245 -255 . DOI: 10.19976/j.cnki.43-1448/TF.2025080

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