journal article·2019-07-01

Mechanochemical Synthesis of High Entropy Oxide Materials under Ambient Conditions: Dispersion of Catalysts via Entropy Maximization

Hao Chen, Wenwen Lin, Zihao Zhang, Kecheng Jie, David R. Mullins, Xiahan Sang, Shi-Ze Yang, Charl J. Jafta, Craig A. Bridges, Xiaobing Hu, Raymond R. Unocic, Jie Fu, Pengfei Zhang, Sheng Dai

ACS Materials Letters· Volume 1· Issue 1
Publisher page

Abstract

The solid-solution metal oxide (NiMgCuZnCo)O is the first known high-entropy (HE) metal oxide synthesized, forming a poster child of the emerging high-entropy oxide materials, which is derived from high-temperature synthesis methodologies (>900 °C). In this work, we report the mechanochemical synthesis of this known HE metal oxide (NiMgCuZnCo)O under ambient conditions. The advantage of this approach was further demonstrated by the introduction of up to 5 wt % noble metal into (NiMgCuZnCo)O, as single atoms or nanoclusters, which showed good stability at high temperature and produced a high catalytic activity in the hydrogenation of atmospheric CO2 to CO. The latter work demonstrated the unique advantage of using HE materials to disperse catalysis centers.
Source: openalex_inverted_index · Quality: baseline

Research context

OpenAlex topics: High Entropy Alloys Studies · Advanced materials and composites · High-Temperature Coating Behaviors

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

Affiliations

Key Laboratory of Biomass Chemical Engineering of Ministry of Education, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, China

Chemical Sciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States

Department of Chemistry, The University of Tennessee, Knoxville, Tennessee 37996, United States

Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States

Department of Materials Science and Engineering, Northwestern University, Evanston, Illinois 60208, United States

School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, Shanghai, China

Funding

National Natural Science Foundation of China · Natural Science Foundation of Zhejiang Province

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