Enhanced Catalytic Performance Towards CO Oxidation of Broccoli-like Ceria Microspheres by Dilute Gallium Doping

IF 2.3 4区化学 Q3 CHEMISTRY, PHYSICAL Catalysis Letters Pub Date : 2025-03-12 DOI:10.1007/s10562-025-04982-1

Minai Zhang, Jierui Xue, Zhuolun Han, Yan Wang, Yizhang Guan, Chee-Keong Tan

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Abstract

The process of catalytically oxidizing carbon monoxide (CO) remains a critical issue across various industrial sectors. However, it continues to be a challenge to achieve effective CO oxidation at low temperatures using non-noble metal catalysts. This study addresses these gaps by investigating the effects of dilute gallium (Ga) doping on the catalytic performance of flower-like ceria (CeO₂) microspheres. By using a modified hydrothermal synthesis method, we prepared the Ga-doped CeO₂ microspheres and characterized their morphology, surface area, and evidence of oxygen vacancy through various experimental techniques as well as computational simulation method. Our findings disclosed that the incorporation of Ga significantly enhances the catalytic performance of CeO₂, with the optimal doping level (2 mol% Ga) achieving a 90% CO conversion temperature (T₉₀) of 388.9 °C, obviously lower than that of pristine CeO₂ (488.5 °C). This work demonstrates that dilute Ga doping effectively improves the catalytic properties of CeO₂-based materials, offering a potential strategy for developing effective CO oxidation catalysts.

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稀镓掺杂增强西兰花类铈微球CO氧化的催化性能

催化氧化一氧化碳（CO）的过程仍然是各个工业部门的关键问题。然而，使用非贵金属催化剂在低温下实现有效的CO氧化仍然是一个挑战。本研究通过研究稀镓（Ga）掺杂对花状铈（CeO2）微球催化性能的影响来解决这些空白。采用改进的水热合成方法制备了ga掺杂的CeO2微球，并通过各种实验技术和计算模拟方法对其形貌、表面积和氧空位证据进行了表征。研究结果表明，Ga的掺入显著提高了CeO2的催化性能，最佳掺杂水平（2 mol% Ga）达到90% CO转化温度（T90）为388.9℃，明显低于原始CeO2（488.5℃）。本研究表明，稀Ga掺杂有效地改善了ceo2基材料的催化性能，为开发有效的CO氧化催化剂提供了潜在的策略。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.