CeO纳米颗粒的暴露晶面和氧化态对CO吸附与脱附的影响
Effect of Exposed Facets and Oxidation State of CeO Nanoparticles on CO Adsorption and Desorption.
作者信息
Seong Gimyeong, Yoko Akira, Tomai Takaaki, Naka Takashi, Wang Haodong, Frenkel Anatoly I, Adschiri Tadafumi
机构信息
New Industry Creation Hatchery Center, Tohoku University, 6-6-10 Aoba, Aramaki, Aoba-ku, Sendai 980-8579, Japan.
Department of Environmental and Energy Engineering, The University of Suwon, 17, Wauan-gil, Bongdam-eup, Hwaseong-si, Gyeonggi-do 18323, Republic of Korea.
出版信息
ACS Sustain Chem Eng. 2024 May 2;12(19):7532-7540. doi: 10.1021/acssuschemeng.4c01322. eCollection 2024 May 13.
CeO nanoparticles exhibit potential as solid adsorbents for carbon dioxide (CO) capture and storage (CCS), offering precise control over various facets and enhancing their efficiency. This study investigated the adsorption and desorption behaviors of two types of CeO nanoparticles: cubic CeO with primarily {001} facets and polyhedral CeO with mainly {111} facets. The results showed that despite polyhedral CeO's lower quantity, it demonstrated successful adsorption-desorption cycles in both oxidized and reduced states. However, reduced CeO exhibited a higher adsorption capacity but displayed irreversible adsorption-desorption cycles. Reversible adsorption occurred through weak bond formation with CO, while cubic CeO with a high oxygen vacancy concentration exhibited irreversible adsorption due to strong bond formation. These insights contribute significantly to understanding CeO nanoparticle characteristics and their impact on the CO adsorption and desorption processes, aiding in the development of advanced CCS techniques.
氧化铈纳米颗粒作为用于二氧化碳（CO）捕获与封存（CCS）的固体吸附剂展现出潜力，能够对各个方面进行精确控制并提高其效率。本研究调查了两种类型的氧化铈纳米颗粒的吸附和解吸行为：主要具有{001}晶面的立方氧化铈和主要具有{111}晶面的多面体氧化铈。结果表明，尽管多面体氧化铈的量较少，但它在氧化态和还原态下均展示出成功的吸附 - 解吸循环。然而，还原态的氧化铈表现出更高的吸附容量，但呈现出不可逆的吸附 - 解吸循环。可逆吸附通过与CO形成弱键发生，而具有高氧空位浓度的立方氧化铈由于形成强键而表现出不可逆吸附。这些见解对于理解氧化铈纳米颗粒特性及其对CO吸附和解吸过程的影响具有重要意义，有助于先进CCS技术的开发。
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