Exsolution–Dissolution of Supported Metals on High-Entropy Co3MnNiCuZnOx: Toward Sintering-Resistant Catalysis,ACS Catalysis

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Exsolution–Dissolution of Supported Metals on High-Entropy Co3MnNiCuZnOx: Toward Sintering-Resistant Catalysis
ACS Catalysis ( IF 11.3 ) Pub Date : 2021-09-17 , DOI: 10.1021/acscatal.1c03228
Jiahua Zhao ₁ , Jiafeng Bao ₁ , Shize Yang ₂ , Qiang Niu ₃ , Rongyong Xie ₃ , Qiuyue Zhang ₄ , Mingshu Chen ₄ , Pengfei Zhang ₁ , Sheng Dai _{5,

6}

Affiliation

Herein, in situ generation of CuCoNi nanoalloys over a high-entropy oxide Co₃MnNiCuZnO_x matrix has been employed to generate a sintering-resistant metal-oxide interface for the CO₂ hydrogenation reaction. The high-entropy Co₃MnNiCuZnO_x catalyst with a single reverse spinel structure was synthesized by a mechanochemical redox-based process and thermal treatment just at 600 °C. Interestingly, the entropy-driven force allows the exsolution and dissolution of CuCoNi alloys under reductive and oxidative recyles, which results in the dynamics confinement of the supported metals. With high temperature (500 °C) CO₂ hydrogenation as a model reaction, the restriction of CuCoNi nanoparticles over a high-entropy Co₃MnNiCuZnO_x matrix guaranteed long-term thermal stability (>100 h). In comparison, binary CoMnO_x as a control catalyst deactivated in 10 h. This high-entropy stabilization may inspire a number of sintering-resistant catalysts in the near future.

中文翻译：

高熵 Co3MnNiCuZnOx 上负载金属的溶出-溶解：走向耐烧结催化

在本文中，已采用在高熵氧化物 Co ₃ MnNiCuZnO _x基体上原位生成 CuCoNi 纳米合金来生成用于 CO ₂加氢反应的耐烧结金属-氧化物界面。具有单一反尖晶石结构的高熵 Co ₃ MnNiCuZnO _x催化剂是通过机械化学氧化还原工艺和仅在 600 °C 下热处理合成的。有趣的是，熵驱动力允许 CuCoNi 合金在还原和氧化循环下脱溶和溶解，从而导致负载金属的动力学限制。具有高温 (500 °C) CO ₂氢化作为模型反应，CuCoNi 纳米颗粒在高熵 Co ₃ MnNiCuZnO _x基体上的限制保证了长期热稳定性（>100 小时）。相比之下，二元 CoMnO _x作为对照催化剂在 10 小时内失活。这种高熵稳定性可能会在不久的将来激发出许多耐烧结催化剂。

更新日期：2021-10-01

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