Lattice distortion in Mn3O4/SmOx nanocomposite catalyst for enhanced carbon monoxide oxidation

Synthesis and advantages of spinel-type composites

“…50 Previous studies reported that the compression of the structure can affect the d-band structure of active atoms, and thereby weaken the adsorption energy of the reactive intermediates. 51 By introducing amorphous SmO x , as demonstrated by Chen et al , 52 crystalline Mn 3 O 4 with lattice distortion was prepared. The XPS results revealed that the full filling of the outer shell orbits of Sm protected the Mn sites at the interfaces from interacting with water.…”

“…62 They found that the doping of cobalt created configurational disorder that led to the presence of Mn 4+ /Mn 3+ hopping pairs at octahedral sites, which were the main active species (Fig. 6a-c 52 Copyright 2023, Elsevier. (e) Radii of cobalt, copper, iron, and aluminium cations with different coordinations.…”

“…XPS spectra of (b) Mn 3 s, (c) O 1 s, and (d) S 2p on the surface of the sulfurized Mn 3 O 4 -S and Sm 0.3 Mn. Reproduced with permission 52. Copyright 2023, Elsevier.…”

Enhanced Durable Corrosion Resistance of Samarium-Doped ZnO Solid Solution Materials by 4f Electrons of Samarium Atoms

“…The high surface alkalinity allows Sm to prevent metal surface corrosion by neutralizing acidic substances in contact with the metal surface . The variable valency of Sm allows it to form a protective oxide layer on the metal surface, which further prevents corrosion. , The fast ion oxygen migration rate of Sm can be used to improve the performance of oxide coatings used for corrosion protection. , The f electrons of Sm will form a stable samarium iron oxide complex with the oxide on the steel surface, forming a samarium transition layer on the metal surface . This transition layer has a stable structure and good electrical conductivity, effectively protecting the steel surface from corrosion and oxidation.…”

“…9 The variable valency of Sm allows it to form a protective oxide layer on the metal surface, which further prevents corrosion. 10,11 The fast ion oxygen migration rate of Sm can be used to improve the performance of oxide coatings used for corrosion protection. 12,13 The f electrons of Sm will form a stable samarium iron oxide complex with the oxide on the steel surface, forming a samarium transition layer on the metal surface.…”