3D Quantification of Low-Coordinate Surface Atom Density: Bridging Catalytic Activity to Concave Facets of Nanocatalysts in Fuel Cells.
A protocol to quantify the distribution of surface atoms of concave nanocatalysts according to their coordination number is proposed. The 3D surface of an Au@Pd concave nanocube is reconstructed and segmented. The crystallographic coordinates and low-coordinate surface atom densities of the concave facets are determined. The result shows that 32% of the surface atoms are low-coordinated, which may contribute to the high activity.
National Center for Electron Microscopy in Beijing, Laboratory of Advanced Materials (MOE), the State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing, 100084, China.
Ye
Y
Xia
National Center for Electron Microscopy in Beijing, Laboratory of Advanced Materials (MOE), the State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing, 100084, China.
Xiaoyan
X
Zhong
EMAT (Electron Microscopy for Materials Science), University of Antwerp, Groenenborgerlaan 171, B-2020, Antwerp, Belgium.|Institute of Microstructure and Property of Advanced Materials, Beijing University of Technology, Beijing, 100124, China.
Xiaoxing
X
Ke
Innovative Catalysis Program, Key Lab of Organic Optoelectronics & Molecular Engineering, Department of Chemistry, Tsinghua University, Beijing, 100084, China.
Gui-Rong
GR
Zhang
National Center for Electron Microscopy in Beijing, Laboratory of Advanced Materials (MOE), the State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing, 100084, China.
Zhiying
Z
Cheng
Innovative Catalysis Program, Key Lab of Organic Optoelectronics & Molecular Engineering, Department of Chemistry, Tsinghua University, Beijing, 100084, China.
Bo-Qing
BQ
Xu
catalyst; electron tomography; fuel cells; low-coordinate surface atoms; nanomaterials