Scanning transmission electron microscopy of high-surface-area Rh-doped CaTiO 3 powder, conducted near atmospheric pressure at elevated temperature (250–700 °C) by means of an electron-transparent gas cell with a sample heater, provides evidence for both cyclical precipitation–dissolution of Rh nanoparticles in response to redox cycling of the ambient gas and sintering of the powder.
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Dai et al. (2017) studied this question.
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