journal article·2023-11-03

Defect Engineering of High-Entropy Oxides for Superior Catalytic Oxidation Performance

Bingzhen Zhang, Dan Deng, Jian Chen, Ying Li, Mingwei Yuan, Weiming Xiao, Shuhua Wang, Xiaolei Wang, Pengfei Zhang, Yuan Shu, Shunli Shi, Chao Chen

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Abstract

High-entropy oxides (HEOs) are crucial in various fields (power storage/conversion, electronic devices, and catalysis) owing to their adjustable structural characteristics, fabulous stability, and massive components. However, the current strategies for synthesizing HEOs suffer from low surface area and limited active sites. Herein, we present a salt-assisted strategy with remarkable universality for the preparation of HEOs with high surface area [e.g., HP-(FeCrCoNiCu) x O y: 59 m 2 /g, HP-(ZnMgNiCuCo) x O y: 49 m 2 /g, and HP-(CrMnFeNiZn) x O y: 11 m 2 /g], where HP means high porosity. Especially, HP-(FeCrCoNiCu) x O y with rich-oxygen vacancies promotes catalytic efficiency for hydrocarbon and alcohol oxidation owing to its hierarchical texture and massive oxygen vacancies. Furthermore, density functional theory is utilized to well illustrate the relationship of the structure and catalytic efficiency within the catalysts. This work offers realistic pathway for the large-scale application of HEOs in catalytic areas.
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Research context

OpenAlex topics: Catalytic Processes in Materials Science · Electrocatalysts for Energy Conversion · High Entropy Alloys Studies

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Key Laboratory of Jiangxi Province for Environment and Energy Catalysis, College of Chemical Engineering and Chemistry, Nanchang University, Nanchang, Jiangxi 330031, P. R. China

School of Power and Mechanical Engineering, The Institute of Technological Sciences, Wuhan University, Wuhan, Hubei 430072, P. R. China

College of Chemical Engineering and Chemistry, Nanchang University, Nanchang, Jiangxi 330031, P. R. China

State Key Laboratory of High-Efficiency Utilization of Coal and Green Chemical Engineering, College of Chemistry and Chemical Engineering, Ningxia University, Yinchuan 750021, China

School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, Shanghai 200240, P. R. China

Funding

National Key Research and Development Program of China · National Natural Science Foundation of China · Natural Science Foundation of Jiangxi Province · Key Laboratory of Nanchang City · Ordos Research and Development Program · Inner Mongolia Research and Development Program

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