Minai Zhang¹, Jierui Xue², Zhuolun Han², Yan Wang², Yizhang Guan^2*, Chee-Keong Tan^2,3,4,5*

1 The Research and Development Center of Guangzhou Automobile Group Co. Ltd. (GAC R&D Center), Guangzhou, 511434, PR China

2 Advanced Materials Thrust, Function Hub, The Hong Kong University of Science and Technology (Guangzhou), Nansha, Guangzhou 511466, China

3 Department of Electronic and Computer Engineering, Hong Kong University of Science and Technology, Hong Kong, China

4 Guangzhou Municipal Key Laboratory of Materials Informatics, The Hong Kong University of Science and Technology (Guangzhou), Guangzhou 511453, Guangdong, China

5 Guangzhou Municipal Key Laboratory of Integrated Circuits Design, The Hong Kong University of Science and Technology (Guangzhou), Guangzhou 511453, Guangdong, China

* Corresponding authors emails: yguan305@connect.hkust-gz.edu.cn, cheekeongtan@ust.hk

DOI10.24435/materialscloud:65-yc [version v1]

Publication date: Dec 09, 2024

How to cite this record

Minai Zhang, Jierui Xue, Zhuolun Han, Yan Wang, Yizhang Guan, Chee-Keong Tan, Enhanced catalytic performance towards CO oxidation of broccoli-like Ceria microsphere by dilute Ga doping, Materials Cloud Archive 2024.192 (2024), https://doi.org/10.24435/materialscloud:65-yc

Description

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.

Materials Cloud sections using this data

Files

File name	Size	Description
Raw Data.zip MD5md5:94a3697853ead28ea9068124acedb620	6.2 MiB	Raw files including the SEM, XRD, BET, Raman, XPS, DFT and CO oxidation data that support the study for this paper
Readme.txt MD5md5:4e69aed432514995661198e7c07f6ff6	325 Bytes	Description file

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Keywords

Ceria microspheres Gallium doping Oxygen vacancy CO oxidation Hydrothermal synthesis Catalytic enhancement