Research Article

A Decrease in NiO-MgO Phase Through Its Solid Solution Equilibrium with Tetragonal ( L a 𝟏 βˆ’ 𝑧 S r 𝑧 ) 𝟐 N i 𝟏 βˆ’ 𝑦 M g 𝑦 O πŸ’ βˆ’ 𝛿 : Effect on Catalytic Partial Oxidation of Methane

Figure 6

O1s XPS of the catalyst precursors made of 0.4 La2O3–0.2 SrO–(1βˆ’x)NiO–xMgO.
263568.fig.006