Engineering the surface structure of nanostructured Ni catalyst by doping titanium towards highly efficient CO2 reforming of methane

IF 4.8 2区化学 Q2 CHEMISTRY, PHYSICAL

Applied Catalysis A: General Pub Date : 2025-09-20 DOI:10.1016/j.apcata.2025.120591

Rui Wang , Li Li , Zhuanzhuan Guo , Yajing Xie , Anjiao Deng , Lizhi Huang , Yali Liu , Luhui Wang , Yan Gao , Long Peng , Qingmin Yang , Changpeng Lv , Ye Wang , Patrick Da Costa , Jingxiao Yu , Chao Sun

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Abstract

A series of nanostructured Ni/SBA-16 catalysts doped with different Ti loadings (0–10 wt%) were prepared and their catalytic behaviors were investigated in the CO₂ reforming of methane reaction. Comprehensive physicochemical analyses revealed that a 2 wt% Ti -doping markedly lowered Ni particle size, enlarged specific surface area and mesopore volume, facilitated NiO reduction, intensified metal–support interaction, and enriched surface-active oxygen species, leading to optimal catalytic activity and coke resistance. However, higher Ti loadings (5–10 %) caused degradation of these structural properties compared to the optimal 2 wt% Ti loading, primarily due to the formation of NiTiO₃ oxides. Consequently, catalytic performance was significantly reduced. Based on these findings, a synergistic relationship between the active metal (Ni) and tailored surface characteristics was established, which was correlated with the enhanced catalytic activity in the CO₂ reforming of methane reaction.

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用掺钛技术改造纳米镍催化剂的表面结构，实现甲烷高效CO2重整

制备了不同掺钛量（0-10 wt%）的纳米Ni/SBA-16催化剂，研究了其在甲烷CO2重整反应中的催化性能。综合理化分析表明，2 wt%的Ti掺杂显著降低了Ni的粒径，增大了比表面积和介孔体积，促进了NiO的还原，增强了金属-载体相互作用，丰富了表面活性氧，从而获得了最佳的催化活性和抗焦性。然而，与最佳的2 wt% Ti负载相比，较高的Ti负载（5-10 %）导致了这些结构性能的退化，主要是由于NiTiO3氧化物的形成。因此，催化性能显著降低。在此基础上，建立了活性金属（Ni）与定制表面特征之间的协同关系，这与甲烷CO2重整反应中催化活性的增强有关。

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来源期刊

Applied Catalysis A: General 化学-环境科学

CiteScore

9.00

自引率

5.50%

发文量

415

审稿时长

24 days

期刊介绍： Applied Catalysis A: General publishes original papers on all aspects of catalysis of basic and practical interest to chemical scientists in both industrial and academic fields, with an emphasis onnew understanding of catalysts and catalytic reactions, new catalytic materials, new techniques, and new processes, especially those that have potential practical implications. Papers that report results of a thorough study or optimization of systems or processes that are well understood, widely studied, or minor variations of known ones are discouraged. Authors should include statements in a separate section "Justification for Publication" of how the manuscript fits the scope of the journal in the cover letter to the editors. Submissions without such justification will be rejected without review.