Kirkendahl effect in Co nanoparticles
These experiments show the changes in nanoparticle morphology during in-situ TEM oxidation of Co nanoparticles in oxygen at elevated temperatures. These kind of in-situ TEM observations are crucial in understanding of the fundamental relationships involved in catalytic activity in these materials.
Left: Movie of the formation of hollow core oxide shells when Co nanoparticles are heated from 150°C to 250°C in 1 bar of flowing oxygen.
Reference: H.L. Xin, K. Niu, D.H. Alsem and H. Zheng. “In-Situ TEM Study of Catalytic Nanoparticle Reactions in Atmospheric Pressure Gas Environment,” Microscopy & Microanalysis 19 (2013) pp. 1558. Abstract
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