X-ray absorption spectroscopy for single-atom catalysts: Critical importance and persistent challenges

Ogino, Isao

doi:10.1016/s1872-2067(17)62880-8

Cited by 36 publications

(18 citation statements)

References 46 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It is vital to understand at the molecular level how supports are involved in catalysis [22,[24][25][26][27][28]. However, the atomic-resolution characterization of interfacial species surrounding isolated metal atoms remains a grand challenge [29][30][31][32][33], preventing us from addressing the key question of how supports are involved in the catalysis of atomically dispersed metal catalysts.…”

Section: Introductionmentioning

confidence: 99%

A vicinal effect for promoting catalysis of Pd1/TiO2: supports of atomically dispersed catalysts play more roles than simply serving as ligands

et al. 2018

View full text Add to dashboard Cite

Section: Introductionmentioning

confidence: 99%

A vicinal effect for promoting catalysis of Pd1/TiO2: supports of atomically dispersed catalysts play more roles than simply serving as ligands

et al. 2018

View full text Add to dashboard Cite

“…Owing to the rapid development of the synchrotron radiation, X-ray absorption fine structure (XAFS) spectroscopy that includes XANES and EXAFS has been widely applied to characterize the electronic information and atomic local structures of both metal clusters and single-atom sites in SACs. ,− XANES provides the information on the average oxidation number and local geometry of single metal atoms; meanwhile, EXAFS contains information about the surrounding environment of single metal atoms in atomic ranges, such as interatomic distance between the single metal atoms and their neighboring atoms, coordination numbers, and thermal and static disorders. For instance, the aberration-corrected HAADF-STEM demonstrated efficient for the observation of the atomically dispersed single Fe atoms on Fe–SAs/NC, but it was helpless to identify the coordination atoms close to the metal atom due to the similar contrasts between these atoms with distant atoms on the support.…”

Section: Characterizationsmentioning

confidence: 99%

Catalytic Nanomaterials toward Atomic Levels for Biomedical Applications: From Metal Clusters to Single-Atom Catalysts

et al. 2021

View full text Add to dashboard Cite

Single-atom catalysts (SACs) featuring the complete atomic utilization of metal, high-efficient catalytic activity, superior selectivity, and excellent stability have been emerged as a frontier in the catalytic field. Recently, increasing interests have been drawn to apply SACs in biomedical fields for enzyme-mimic catalysis and disease therapy. To fulfill the demand of precision and personalized medicine, precisely engineering the structure and active site toward atomic levels is a trend for nanomedicines, promoting the evolution of metal-based biomedical nanomaterials, particularly biocatalytic nanomaterials, from nanoparticles to clusters and now to SACs. This review outlines the syntheses, characterizations, and catalytic mechanisms of metal clusters and SACs, with a focus on their biomedical applications including biosensing, antibacterial therapy, and cancer therapy, as well as an emphasis on their in vivo biological safeties. Challenges and future perspectives are ultimately prospected for SACs in diverse biomedical applications.

show abstract

“…Meanwhile, X-ray absorption spectroscopy (XAS) can provide information on the electronic structure, coordination environment, and metal-carrier interaction of the active metal atoms in the catalysts. [148] Based on XAS data, extended X-ray absorption fine structure (EXAFS) and X-ray absorption near edge structure (XANES) information can be obtained, including the distance (bond length) between the absorbed and the adjacent atoms, coordination number, and the valence state of the absorbed atoms. Hou et al designed a cantilever structure decorated with isolated single-atom Fe sites (Fe/OES) catalyzed by the oxygen reduction reaction (ORR) using a SiO 2 -mediated MOF template method.…”

Section: Sacsmentioning

confidence: 99%

Which is Better for Nanomedicines: Nanocatalysts or Single‐Atom Catalysts?

Zhao

Zhang

Yang

et al. 2020

Adv Healthcare Materials

View full text Add to dashboard Cite

With the rapid advancements in nanotechnology and materials science, numerous nanomaterials have been used as catalysts for nanomedical applications. Their design and modification according to the microenvironment of diseases have been shown to achieve effective treatment. Chemists are in pursuit of nanocatalysts that are more efficient, controllable, and less toxic by developing innovative synthetic technologies and improving existing ones. Recently, single-atom catalysts (SACs) with excellent catalytic activity and high selectivity have attracted increasing attention because of their accurate design as nanomaterials at the atomic level, thereby highlighting their potential for nanomedical applications. In this review, the recent advances in nanocatalysts and SACs are briefly summarized according to their synthesis, characterizations, catalytic mechanisms, and nanomedical applications. The opportunities and future scope for their development and the issues and challenges for their application as nanomedicine are also discussed. As far as it is known, the review is the systematic comparison of nanocatalysts and SACs, especially in the field of nanomedicine, which has promoted the development of nanocatalytic medicine.

show abstract

X-ray absorption spectroscopy for single-atom catalysts: Critical importance and persistent challenges

Cited by 36 publications

References 46 publications

A vicinal effect for promoting catalysis of Pd1/TiO2: supports of atomically dispersed catalysts play more roles than simply serving as ligands

A vicinal effect for promoting catalysis of Pd1/TiO2: supports of atomically dispersed catalysts play more roles than simply serving as ligands

Catalytic Nanomaterials toward Atomic Levels for Biomedical Applications: From Metal Clusters to Single-Atom Catalysts

Which is Better for Nanomedicines: Nanocatalysts or Single‐Atom Catalysts?

Contact Info

Product

Resources

About