Room-Temperature Synthesis of High-Entropy Perovskite Oxide Nanoparticle Catalysts through Ultrasonication-Based Method.,ChemSusChem

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Room-Temperature Synthesis of High-Entropy Perovskite Oxide Nanoparticle Catalysts through Ultrasonication-Based Method.
ChemSusChem ( IF 7.5 ) Pub Date : 2019-11-29 , DOI: 10.1002/cssc.201902705
Francis Okejiri _{1,

2} , Zihao Zhang ₁ , Jixing Liu ₁ , Miaomiao Liu ₁ , Shize Yang ₃ , Sheng Dai _{1,

2}

Affiliation

In the present study, a sonochemical-based method for one-pot synthesis of entropy-stabilized perovskite oxide nanoparticle catalysts with high surface area was developed. The high-entropy perovskite oxides were synthesized as monodispersed, spherical nanoparticles with an average crystallite size of approximately 5.9 nm. Taking advantage of the acoustic cavitation phenomenon in the ultrasonication process, BaSr(ZrHfTi)O3 , BaSrBi(ZrHfTiFe)O3 and Ru/BaSrBi(ZrHfTiFe)O3 nanoparticles were crystallized as single-phase perovskite structures through ultrasonication exposure without calcination. Notably, the entropically-driven stability of Ru/BaSrBi(ZrHfTiFe)O3 with excellent dispersion of Ru in the perovskite phase bestowed the nanoparticles of Ru/BaSrBi(ZrHfTiFe)O3 with good catalytic activity for CO oxidation.

中文翻译：

基于超声法的室温合成高熵钙钛矿氧化物纳米粒子催化剂。

在本研究中，开发了一种基于声化学的方法，用于一锅合成高表面积的熵稳定的钙钛矿氧化物纳米颗粒催化剂。高熵钙钛矿氧化物被合成为平均晶粒尺寸约为5.9 nm的单分散球形纳米颗粒。利用超声过程中的声空化现象，BaSr（ZrHfTi）O3，BaSrBi（ZrHfTiFe）O3和Ru / BaSrBi（ZrHfTiFe）O3纳米颗粒通过超声暴露而无煅烧，形成单相钙钛矿结构。值得注意的是，Ru / BaSrBi（ZrHfTiFe）O3的熵驱动稳定性和钙钛矿相中Ru的优异分散性赋予了Ru / BaSrBi（ZrHfTiFe）O3纳米颗粒具有良好的CO氧化催化活性。

更新日期：2019-11-30

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