Fig. 2
From: Nickel@Siloxene catalytic nanosheets for high-performance CO2 methanation
Characterization of NiO@SiXNS materials. a PXRD patterns showing characteristic peaks from the (*) SiXNS and (♦) NiO constituents of the composite materials. b H2–TPR (hydrogen temperature programmed reduction) plots indicating the appreciable difference in the onset of NiO reduction on heating under a hydrogen atmosphere. c, d XPS spectra illustrating the differences in the local bonding environments of c Si 2p and d Ni 2p3/2 obtained from of NiO@SiXNS samples (green peak refers to NiSiO3, cyan peak corresponds to NiO, and yellow one is the satellite peak)
