“…43,44 Periodic lattice fringes observed with a spacing of 0.336 nm can be ascribed to the interference lattice fringes of Pd and Ni. 30,42 XRD of Pd(0)@enSiO 2 -Ni-TiO 2 was performed to study the crystalline nature of the catalyst. In the XRD spectra of the catalyst, peaks at 25.41, 37.91, 48.131, 551, and 62.41 correspond to the (101), (004), ( 200), ( 211) and (204) planes of titania, 45 whereas the weak diffraction peaks at 45.31, 681 and 821 correspond to the (111) plane of Ni and the (220) and (331) planes of Pd, respectively, in a face centred cubic crystal (fcc).…”