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

被引：3

作者：

Seong, Gimyeong ^{[1
,2
]}

Yoko, Akira ^{[3
,4
]}

Tomai, Takaaki ^{[5
]}

Naka, Takashi ^{[6
]}

Wang, Haodong ^{[7
]}

Frenkel, Anatoly I. ^{[7
,8
]}

Adschiri, Tadafumi ^{[1
,3
]}

机构：

[1] Tohoku Univ, New Ind Creat Hatchery Ctr, Sendai 9808579, Japan

[2] Univ Suwon, Dept Environm Energy Engn, Hwaseong si 18323, Gyeonggi do, South Korea

[3] Tohoku Univ, WPI Adv Inst Mat Res WPI AIMR, Sendai, Miyagi 9808577, Japan

[4] Tohoku Univ, Int Ctr Synchrotron Radiat Innovat Smart, Sendai 9808579, Japan

[5] Tohoku Univ, Inst Multidisciplinary Res Adv Mat, Sendai 9808577, Japan

[6] Natl Inst Mat Sci NIMS, Tsukuba, Ibaraki 3050047, Japan

[7] SUNY Stony Brook, Dept Mat Sci & Chem Engn, Stony Brook, NY 11794 USA

[8] Brookhaven Natl Lab, Chem Div, Upton, NY 11973 USA

来源：

ACS SUSTAINABLE CHEMISTRY & ENGINEERING | 2024年 / 12卷 / 19期

关键词：

adsorbent; CeO2; CCS; facetcontrol; oxidation state; LATTICE-PARAMETER; OXYGEN VACANCY; CARBON-DIOXIDE; BASE CATALYSIS; CERIA; REDUCTION; SURFACE; OXIDE; FTIR; ACTIVATION;

D O I：

10.1021/acssuschemeng.4c01322

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

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 CeO2-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.

引用

页码：7532 / 7540

页数：9

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