Effect of Exposed Facets and Oxidation State of CeO2 Nanoparticles on CO2 Adsorption and Desorption

Gimyeong Seong; Akira Yoko; Takaaki Tomai; Takashi Naka; Haodong Wang; Anatoly I Frenkel; Tadafumi Adschiri

doi:10.1021/acssuschemeng.4c01322

Effect of Exposed Facets and Oxidation State of CeO₂ Nanoparticles on CO₂ Adsorption and Desorption

ACS Sustain Chem Eng. 2024 May 2;12(19):7532-7540. doi: 10.1021/acssuschemeng.4c01322. eCollection 2024 May 13.

Authors

Gimyeong Seong^{1

2}, Akira Yoko^{3

4}, Takaaki Tomai⁵, Takashi Naka⁶, Haodong Wang⁷, Anatoly I Frenkel^{7

8}, Tadafumi Adschiri^{1

3}

Affiliations

¹ New Industry Creation Hatchery Center, Tohoku University, 6-6-10 Aoba, Aramaki, Aoba-ku, Sendai 980-8579, Japan.
² Department of Environmental and Energy Engineering, The University of Suwon, 17, Wauan-gil, Bongdam-eup, Hwaseong-si, Gyeonggi-do 18323, Republic of Korea.
³ WPI-Advanced Institute for Materials Research (WPI-AIMR), Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai 980-8577, Japan.
⁴ International Center for Synchrotron Radiation Innovation Smart, Tohoku University, 468-1, Aoba, Aramaki, Aoba-ku, Sendai 980-8579, Japan.
⁵ Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai 980-8577, Japan.
⁶ National Institute of Materials Sciences (NIMS), 1-2-1 Sengen, Tsukuba, Ibaraki 305-0047, Japan.
⁷ Department of Materials Science and Chemical Engineering, Stony Brook University, Stony Brook, New York 11794, United States.
⁸ Chemistry Division, Brookhaven National Laboratory, Upton, New York 11973, United States.

Abstract

CeO₂ nanoparticles exhibit potential as solid adsorbents for carbon dioxide (CO₂) 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 CeO₂ nanoparticles: cubic CeO₂ with primarily {001} facets and polyhedral CeO₂ with mainly {111} facets. The results showed that despite polyhedral CeO₂'s lower quantity, it demonstrated successful adsorption-desorption cycles in both oxidized and reduced states. However, reduced CeO_2-x exhibited a higher adsorption capacity but displayed irreversible adsorption-desorption cycles. Reversible adsorption occurred through weak bond formation with CO₂, while cubic CeO₂ with a high oxygen vacancy concentration exhibited irreversible adsorption due to strong bond formation. These insights contribute significantly to understanding CeO₂ nanoparticle characteristics and their impact on the CO₂ adsorption and desorption processes, aiding in the development of advanced CCS techniques.