학술논문
Constrained Thorough Search Analysis of Multi-edge EXAFS Spectra for Characterization of Bimetallic Nanoparticles
Document Type
Article
Source
Chemistry Letters; May 2022, Vol. 51 Issue: 5 p538-541, 4p
Subject
Language
ISSN
03667022; 13480715
Abstract
The constrained thorough search (CTS) method has been applied to extended X-ray absorption fine structure (EXAFS) analysis of PtRu bimetallic nanoparticles for fuel-cell anode catalysts that are highly resistant to CO poisoning. The PtRu has a cluster-in-cluster or homobondphilic structure. CTS analysis of EXAFS data not only analyzes Pt and Ru edge-EXAFS data simultaneously but also includes the physical constraints with errors. The method is expected to make EXAFS analysis more reliable than the conventional curve-fitting method.Constrained thorough search (CTS) analysis for EXAFS has revealed the microstructure of PtRu bimetallic nanoparticles for fuel cell anode catalysts. The PtRu has a cluster-in-cluster or homobondphilic structure, not a core–shell or random alloy structure. CTS analysis of EXAFS data not only analyzes Pt and Ru edge-EXAFS data simultaneously but also includes the physical constraints.