An ultrastable heterostructured oxide catalyst based on high-entropy materials: A new strategy toward catalyst stabilization via synergistic interfacial interaction

Hao Chen, Kecheng Jie, Charl J. Jafta, Zhenzhen Yang, Siyu Yao, Miaomiao Liu, Zihao Zhang, Jixing Liu, Miaofang Chi, Jie Fu, Sheng Dai

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114 Scopus citations

Abstract

Designing high-performance catalysts that can stabilize catalytic active sites against sintering to deactivation at temperature higher than 900 °C is significant but challenging. Here we report a new strategy to obtain a transition metal oxide catalyst with high temperature stability for CO oxidation. This is achieved through a synergistic interfacial interaction at the interface of a heterostructure between high–entropy oxides (HEO, high temperature stability) and CuCeOx (catalytic site). The catalytic site (CuCeOx) for CO oxidation is realized by dissolving an amount of Cu species in HEO into CeO2 via an entropy–driven mechanochemical process. In situ XRD and HAADF–STEM have confirmed the high temperature stability of the heterostructure CuCeOx–HEO, which can remain its CO oxidation catalytic activity at elevated temperatures. It should be expected that this innovative will offer the potential to the synthesis of catalysts with high temperature stability in industry.

Original languageEnglish
Article number119155
JournalApplied Catalysis B: Environmental
Volume276
DOIs
StatePublished - Nov 5 2020

Funding

HC, KCJ, ZZY, JXL, and SD were supported by the Division of Chemical Sciences, Geosciences, and Biosciences, Office of Basic Energy Sciences, US Department of Energy . STEM imaging was conducted at the Center for Nanophase Materials Sciences, which is a DOE Office of Science User Facility. JF was supported by the National Natural Science Foundation of China (No. 21706228 , 21978259 ), the Zhejiang Provincial Natural Science Foundation of China (No. LR17B060002 ) and the Fundamental Research Funds for the Central Universities . HC, KCJ, ZZY, JXL, and SD were supported by the Division of Chemical Sciences, Geosciences, and Biosciences, Office of Basic Energy Sciences, US Department of Energy. STEM imaging was conducted at the Center for Nanophase Materials Sciences, which is a DOE Office of Science User Facility. JF was supported by the National Natural Science Foundation of China (No. 21706228, 21978259), the Zhejiang Provincial Natural Science Foundation of China (No. LR17B060002) and the Fundamental Research Funds for the Central Universities.

Keywords

  • CO oxidation
  • CuCeO
  • High-temperature stability
  • High–entropy oxide
  • Interfacial synergistic

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