Degradation Behavior of CeO2-Based Nanoparticles as Oxygen Carriers for the Chemical Looping Process

IF 5.5 2区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

ACS Applied Nano Materials Pub Date : 2025-02-17 DOI:10.1021/acsanm.4c0696610.1021/acsanm.4c06966

Daiki Takahashi, Akira Yoko, Gimyeong Seong, Kazuyuki Iwase, Tadafumi Adschiri and Takaaki Tomai*,

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Abstract

In this study, we investigated the degradation behavior of CeO₂-based nanoparticles as oxygen carriers for the chemical looping process. In the investigation of the dependency of the reaction gases on the degradation in terms of changes in the CeO₂ crystallite, H₂O and H₂ caused the most significant increase in the crystallite size (sintering) compared with other gases. It was found that Pt decoration, a well-known method for the enhancement of performance as an oxygen carrier, was effective in suppressing the sintering in various reaction gases. On the other hand, mixing with ZrO₂ nanoparticles that are not reactive as oxygen carriers also improves the durability of CeO₂. The sintering-prevention effect of mixing ZrO₂ nanoparticles as nano-obstacles also contributes to exploiting the intrinsic catalytic activity of CeO₂ nanoparticles. Mixing with other nanomaterials would be a universal strategy for improving the durability and activity of thermodynamically unstable nanocatalysts.

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氧化铈纳米粒子作为氧载体在化学环化过程中的降解行为

在这项研究中，我们研究了基于ceo2的纳米颗粒作为氧载体在化学环过程中的降解行为。在考察反应气体对CeO2结晶变化对降解的依赖性时，H2O和H2比其他气体对结晶尺寸（烧结）的增加最为显著。结果表明，作为氧载体的铂修饰可以有效地抑制各种反应气体中的烧结。另一方面，与不作为氧载体的ZrO2纳米粒子混合也提高了CeO2的耐久性。混合ZrO2纳米粒子作为纳米障碍物的防烧结效果也有助于开发CeO2纳米粒子的内在催化活性。与其他纳米材料混合将是提高热不稳定纳米催化剂的耐久性和活性的通用策略。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

ACS Applied Nano Materials Multiple-

CiteScore

8.30

自引率

3.40%

发文量

1601

期刊介绍： ACS Applied Nano Materials is an interdisciplinary journal publishing original research covering all aspects of engineering, chemistry, physics and biology relevant to applications of nanomaterials. The journal is devoted to reports of new and original experimental and theoretical research of an applied nature that integrate knowledge in the areas of materials, engineering, physics, bioscience, and chemistry into important applications of nanomaterials.