fig5
Figure 5. X-ray diffraction (XRD) patterns of the xNi-LCCM powder, synthesized using water-based gel-casting techniques, (A) calcined at 1050 °C for 10 h in air; (B) reduced at 750 °C for 2 h in N2 blended H2; (C) treated at 750 °C for 15 h in CH4. The phases of LCCM, Ni, NiO, and the produced carbon material were differentiated and indicated by various solid symbols: brown square, grey triangle, green triangle, and black circle, respectively. LCCM: (La0.75Ca0.25)(Cr0.5Mn0.5)O3-δ.
