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Liquid-Feed Flame Spray Pyrolysis as a Method of Producing Mixed-Metal Oxide Nanopowders of Potential Interest as Catalytic Materials. Nanopowders along the NiO−Al2O3 Tie Line Including (NiO)0.22(Al2O3)0.78, a New Inverse Spinel Composition

“…These findings are supported by studies on NiCr 2 O 4 37 and NiFe 2 O 4 38 that show that Ni 2+ tends to force formation of inverse spinel phases. [39][40][41] In the current studies we find that the inverse spinel phase can "saturate" at high Ni contents, with the divalent cation driving formation of intermediate spinels.…”

“…Complimentary work on the use of LF-FSP to synthesize phase-segregated catalysts has been described by Baiker et al [26][27][28][29] Here we explore NiO-Al 2 O 3 phase space with the goal of demonstrating that LF-FSP offers the potential to generate novel, single-phase forms of catalytic materials, which contrasts with earlier efforts in this field which suggest that it is difficult to form phase pure nickel spinels. [30][31][32][33][34][35][36][37][38][39][40] In this light, we also report on the hitherto unknown and thermally stable inverse nickel spinel, (NiO) 0.22 -(Al 2 O 3 ) 0.78 .…”

Temperature-dependent vibrational spectroscopic and X-ray diffraction investigation of nanosized nickel chromite

“…This assumption is confirmed in the case of nickel (Ni 2+ , d 8 ) [1][2][3][4][5] and copper (Cu 2+ , d 9 ) [1,5,6]. The features of Jahn-Teller transition were studied in the [7,8].…”