Synergistic Regulation of Rare Earth and Noble Metal Promoters on Ni-based Bifunctional Materials for Enhanced CO2 Methanation Performance and Reaction Mechanism

IF 2.3 4区化学 Q3 CHEMISTRY, PHYSICAL

Catalysis Letters Pub Date : 2025-04-09 DOI:10.1007/s10562-025-04995-w

Yang Zheng, Wei Su, Zhenghao Wang, Ningtao Zhang, Yi Xing

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Abstract

With the increasing severity of global carbon emissions, promoting the resource utilization of carbon dioxide (CO₂) has emerged as the key strategy to address climate change. This study developed Ni-based dual-functional catalysts for CO₂ methanation and introduced various additives (La, Pr, and Ir) to enhance catalytic efficiency. Experimental results indicated that all modified catalysts exhibited high methane selectivity (> 95%) during CO₂ methanation. Among them, the Pr-DFM material demonstrated a 135% increase in methane yield under anoxic conditions compared to the unmodified material. Ir-DFM exhibited excellent anti-oxidation performance at 300 °C, maintaining high catalytic activity after ten cycles. In situ, Fourier transform infrared spectroscopy analysis revealed that the CO₂ conversion pathway for Ir-DFM followed the formate pathway and maintained a stable reaction under oxidative conditions. This study improved the CO₂-to-methane conversion efficiency by modifying Ni-based dual-functional materials with different additives, with Ir-DFM exhibiting exceptional stability and CO₂ adsorption-catalysis performance. It offers novel catalyst design concepts for CO₂ resource utilization and establishes a theoretical framework for optimizing and applying future catalysts.

Graphical Abstract

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稀土和贵金属促进剂对镍基双功能材料增强CO2甲烷化性能的协同调控及反应机理

随着全球碳排放的日益严重，促进二氧化碳资源利用已成为应对气候变化的关键战略。本研究开发了镍基双功能CO2甲烷化催化剂，并引入了La、Pr、Ir等添加剂来提高催化效率。实验结果表明，所有改性催化剂在CO2甲烷化过程中都具有较高的甲烷选择性（95%）。其中，Pr-DFM材料在缺氧条件下的甲烷产率比未改性材料提高了135%。Ir-DFM在300℃下表现出优异的抗氧化性能，10次循环后仍保持较高的催化活性。原位傅里叶红外光谱分析表明，Ir-DFM的CO2转化途径遵循甲酸途径，在氧化条件下保持稳定的反应。本研究通过添加不同添加剂对ni基双功能材料进行改性，提高了CO2-甲烷转化效率，其中Ir-DFM表现出优异的稳定性和CO2吸附催化性能。为CO2资源利用提供了新的催化剂设计理念，为未来催化剂的优化和应用建立了理论框架。图形抽象

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来源期刊

Catalysis Letters 化学-物理化学

CiteScore

5.70

自引率

3.60%

发文量

327

审稿时长

1 months

期刊介绍： Catalysis Letters aim is the rapid publication of outstanding and high-impact original research articles in catalysis. The scope of the journal covers a broad range of topics in all fields of both applied and theoretical catalysis, including heterogeneous, homogeneous and biocatalysis. The high-quality original research articles published in Catalysis Letters are subject to rigorous peer review. Accepted papers are published online first and subsequently in print issues. All contributions must include a graphical abstract. Manuscripts should be written in English and the responsibility lies with the authors to ensure that they are grammatically and linguistically correct. Authors for whom English is not the working language are encouraged to consider using a professional language-editing service before submitting their manuscripts.