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. 2019 Jan 22;116(6):1974–1983. doi: 10.1073/pnas.1815643116

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Fig. 2. — (A) In situ heating XRD patterns of Pt₃Co/C annealed at various temperatures. The dashed line represents the as-synthesized Pt₃Co/C alloy. (B) Calculated relative content of ordered intermetallic Pt₃Co/C formed and particle size [calculated from the width of the (111) peak]. (C) In situ heating XRD patterns of Pt₃Co/C at 750 °C, the optimal temperature, as a function of annealing time. (D) Calculated relative content of ordered Pt₃Co/C formed and particle size.