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

By Hao Chen, Wenwen Lin, Zihao Zhang, Kecheng Jie, D. Mullins, Xiahan Sang, Shi-ze Yang, C. Jafta, C. Bridges, Xiaobing Hu and 4 more. ACS Materials Letters, 2019

208 citations recorded by the source corpus.

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.

Subfields: Aerospace Engineering, Mechanical Engineering

View Paper: https://www.semanticscholar.org/paper/430c85ad15173d53ec099c78815dc78f649734cd

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Citations in the corpus

• High-entropy materials for catalysis: A new frontier (2021, methodology): “Leveraging the high local temperature induced by ball milling, the authors incorporated up to 5 wt % of noble metal species as a combination of single atoms and nanoclusters onto the NiMgCuZnCoOx support (123).”