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. 2021 Feb 19;11(5):2956–2967. doi: 10.1021/acscatal.0c04695

Figure 7.

Figure 7

Linear combination fitting of the normalized Co K-edge XANES with Co-hcp/fcc and Co2C references over the whole FTS range. In the end state, at 47 h, there is 60.4% metallic Co and 40.6% Co2C. With increasing TOS, the error becomes larger, probably due to the intergrowth of the different cobalt fractions.