Othman Ali, Gowda Akshay, Andreescu Daniel, Hassan Mohamed H, Babu S V, Seo Jihoon, Andreescu Silvana
Department of Chemistry and Biomolecular Science, Clarkson University, Potsdam, New York 13699-5810, USA.
Department of Chemical and Biomolecular Engineering, Clarkson University, Potsdam, New York 13699, USA.
Mater Horiz. 2024 Jul 15;11(14):3213-3266. doi: 10.1039/d4mh00055b.
Cerium oxide nanoparticles (CeNPs) are versatile materials with unique and unusual properties that vary depending on their surface chemistry, size, shape, coating, oxidation states, crystallinity, dopant, and structural and surface defects. This review encompasses advances made over the past twenty years in the development of CeNPs and ceria-based nanostructures, the structural determinants affecting their activity, and translation of these distinct features into applications. The two oxidation states of nanosized CeNPs (Ce/Ce) coexisting at the nanoscale level facilitate the formation of oxygen vacancies and defect states, which confer extremely high reactivity and oxygen buffering capacity and the ability to act as catalysts for oxidation and reduction reactions. However, the method of synthesis, surface functionalization, surface coating and defects are important factors in determining their properties. This review highlights key properties of CeNPs, their synthesis, interactions, and reaction pathways and provides examples of emerging applications. Due to their unique properties, CeNPs have become quintessential candidates for catalysis, chemical mechanical planarization (CMP), sensing, biomedical applications, and environmental remediation, with tremendous potential to create novel products and translational innovations in a wide range of industries. This review highlights the timely relevance and the transformative potential of these materials in addressing societal challenges and driving technological advancements across these fields.
氧化铈纳米颗粒（CeNPs）是具有独特和非凡性质的多功能材料，这些性质会因其表面化学、尺寸、形状、涂层、氧化态、结晶度、掺杂剂以及结构和表面缺陷而有所不同。本综述涵盖了过去二十年来CeNPs和基于氧化铈的纳米结构的发展进展、影响其活性的结构决定因素，以及将这些独特特性转化为应用的情况。纳米级CeNPs的两种氧化态（Ce³⁺/Ce⁴⁺）在纳米尺度上共存，促进了氧空位和缺陷态的形成，赋予了极高的反应活性和氧缓冲能力，以及作为氧化和还原反应催化剂的能力。然而，合成方法、表面功能化、表面涂层和缺陷是决定其性质的重要因素。本综述突出了CeNPs的关键性质、其合成、相互作用和反应途径，并提供了新兴应用的实例。由于其独特的性质，CeNPs已成为催化、化学机械平面化（CMP）、传感、生物医学应用和环境修复的典型候选材料，在广泛的行业中具有创造新产品和转化创新的巨大潜力。本综述强调了这些材料在应对社会挑战和推动这些领域的技术进步方面的及时性相关性和变革潜力。
