Surface-induced structural modification in ZnO nanoparticles

Tailoring Anisotropic Morphology at the Nanoregime: Surface Bonding Motif Determines the Morphology Transformation of ZnO Nanostructures

“…Recent progress showed surface-induced structural modification in nanoparticles, resulting in the variations of bond length in nanoparticles. 9 As shown in Figure 3, Zn−O bond lengths in the lattice change in order to compensate the inadequate bond valence generated by unsaturated atoms on the surface to maintain the total bond valence of ZnO particles. There are two cases.…”

“…8 Recent progress showed surface-induced structural modification in nanoparticles, resulting in the variations of bond length near the surface of nanoparticles. 9 Chemical bonds play fundamental roles in determining materials properties 10,11 and crystal growth behaviors. 12,13 At the nanoregime, surface/volume ratio is sizedependent.…”

“…For some anisotropic morphologies, the variation of percentage of surface atoms with total number of atoms was used to predict the size regime in which the nanostructures were obtained, yet this approach required an assumption about the shape of nanostructures . Recent progress showed surface-induced structural modification in nanoparticles, resulting in the variations of bond length near the surface of nanoparticles . Chemical bonds play fundamental roles in determining materials properties , and crystal growth behaviors. , At the nanoregime, surface/volume ratio is size-dependent.…”

Single‐Phase Formation of Rh2O3 Nanoparticles on h‐BN Support for Highly Controlled Methane Partial Oxidation to Syngas

“…However, small nanoparticles exhibit a large surface‐to‐volume ratio, giving that inhomogeneous metal‐support interfaces govern the overall nanoparticle growth during calcination [3] . More specifically, the anisotropic surface structure, [4] surface dangling bonds, [5] and intrinsic oxygen vacancies [6] on most oxide supports induce locally different energetic pathways, resulting in the formation of various rhodium oxide phases such as atomically dispersed RhO x , disordered Rh x O y species, as well as corundum‐Rh 2 O 3 (I) species, which is a thermodynamically stable phase below 1350 °C [7] . Such multiple active phases lead to the involvement of unwanted reactions in various catalytic applications, [8] making it difficult to identify the relationship between the structure and catalytic performance.…”

Single‐Phase Formation of Rh2O3 Nanoparticles on h‐BN Support for Highly Controlled Methane Partial Oxidation to Syngas

“…[2] However,s mall nanoparticles exhibit al arge surface-tovolume ratio,g iving that inhomogeneous metal-support interfaces govern the overall nanoparticle growth during calcination. [3] More specifically,the anisotropic surface struc-ture, [4] surface dangling bonds, [5] and intrinsic oxygen vacancies [6] on most oxide supports induce locally different energetic pathways,r esulting in the formation of various rhodium oxide phases such as atomically dispersed RhO x , disordered Rh x O y species,a sw ell as corundum-Rh 2 O 3 (I) species,w hich is at hermodynamically stable phase below 1350 8 8C. [7] Such multiple active phases lead to the involvement of unwanted reactions in various catalytic applications, [8] making it difficult to identify the relationship between the structure and catalytic performance.…”