Ni-Co双金属尖晶石氧化物的光热催化甲烷干重整性能：协同效应与结构调控

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

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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

Received: 24 November 2025 Published: 03 July 2026

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	XIONG Dan
	BAI Zhihao
	YU Shouwu
	MENG Xianguang

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XIONG Dan,BAI Zhihao,YU Shouwu, et al. 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.

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http://pmbjb.csu.edu.cn/EN/10.19976/j.cnki.43-1448/TF.2025080 OR http://pmbjb.csu.edu.cn/EN/Y2026/V31/I3/245

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