Issue

Vol. 16 (2024)

Nanoparticle Exsolution on Perovskite Oxides: Insights into Mechanism, Characteristics and Novel Strategies

https://doi.org/10.1007/s40820-023-01258-4
Yo Han Kim
Department of Materials Science and Engineering, Incheon National University, Incheon 22012, Republic of Korea
Hyeongwon Jeong
Department of Materials Science and Engineering, Incheon National University, Incheon 22012, Republic of Korea
Bo‑Ram Won
Department of Materials Science and Engineering, Incheon National University, Incheon 22012, Republic of Korea
Hyejin Jeon
Department of Materials Science and Engineering, Incheon National University, Incheon 22012, Republic of Korea
Chan‑ho Park
Department of Materials Science and Engineering, Incheon National University, Incheon 22012, Republic of Korea
Dayoung Park
Department of Materials Science and Engineering, Incheon National University, Incheon 22012, Republic of Korea
Yeeun Kim
Department of Materials Science and Engineering, Incheon National University, Incheon 22012, Republic of Korea
Somi Lee
Department of Materials Science and Engineering, Incheon National University, Incheon 22012, Republic of Korea
Jae‑ha Myung
Department of Materials Science and Engineering, Incheon National University, Incheon 22012, Republic of Korea

Corresponding Author: Jae‑ha Myung

mjaeha@inu.ac.kr

Nano-Micro Letters, Vol. 16 (2024), Article Number: 33

Abstract

Supported nanoparticles have attracted considerable attention as a promising catalyst for achieving unique properties in numerous applications, including fuel cells, chemical conversion, and batteries. Nanocatalysts demonstrate high activity by expanding the number of active sites, but they also intensify deactivation issues, such as agglomeration and poisoning, simultaneously. Exsolution for bottom-up synthesis of supported nanoparticles has emerged as a breakthrough technique to overcome limitations associated with conventional nanomaterials. Nanoparticles are uniformly exsolved from perovskite oxide supports and socketed into the oxide support by a one-step reduction process. Their uniformity and stability, resulting from the socketed structure, play a crucial role in the development of novel nanocatalysts. Recently, tremendous research efforts have been dedicated to further controlling exsolution particles. To effectively address exsolution at a more precise level, understanding the underlying mechanism is essential. This review presents a comprehensive overview of the exsolution mechanism, with a focus on its driving force, processes, properties, and synergetic strategies, as well as new pathways for optimizing nanocatalysts in diverse applications.


Highlights:
1 Fundamental mechanisms in terms of driving force, material design, and exsolution processes are outlined, and novel behaviors of socketing and shape-shifting throughout the interaction with the oxide support are discussed.
2 This review examines the key control factors, encompassing external conditions and intrinsic properties that affect the surface exsolution of metallic nanoparticles.
3 The extraordinary nature of exsolution particles and their effect on various applications are discussed, along with the latest strategies for improving exsolution behavior.

Keywords

Supported nanoparticle Exsolution In situ growth Mechanism Perovskite oxide Catalyst
Kim, Yo Han, Hyeongwon Jeong, Bo‑Ram Won, Hyejin Jeon, Chan‑ho Park, Dayoung Park, Yeeun Kim, Somi Lee, and Jae‑ha Myung. 2023. “Nanoparticle Exsolution on Perovskite Oxides: Insights into Mechanism, Characteristics and Novel Strategies”. Nano-Micro Letters 16 (November):33. https://doi.org/10.1007/s40820-023-01258-4.
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