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XRD patterns of (a) Co-WC (2), NiCo-WC (5), and Ni-WC (1); (b) Co-MoC (4), NiCo-MoC (6), and Ni-MoC (3); (c) NiFe-WC (7) and Ni-WC (1); and (d) NiFe-MoC (8) and Ni-MoC (3). The XRD peaks in the trimetallic carbides are assigned to the characteristic peaks of both the bimetallic carbides. The peaks marked with an asterisk (*) are not from impurities but from tungsten oxide (WO3).
