Nanostructural transformations during the reduction of hollow and porous nickel oxide nanoparticles.

Nanostructural transformations during the reduction of hollow and porous nickel oxide nanoparticles.

Nanoscale (2012-11-22)

John A Medford, Aaron C Johnston-Peck, Joseph B Tracy

ABSTRACT

Size-dependent nanostructural transformations occurring during the H(2)-mediated reduction of hollow and porous NiO nanoparticles were investigated for controlled nanoparticle sizes of ~10 to 100 nm. Transmission electron microscopy reveals that the location and number of reduction sites strongly depend on the nanoparticle size and structure.

MATERIALS

Product Number

Brand

Product Description

637130

Sigma-Aldrich

Nickel(II) oxide, nanopowder, <50 nm particle size (TEM), 99.8% trace metals basis

481793

Sigma-Aldrich

Nickel(II) oxide, ≥99.995% trace metals basis

399523

Sigma-Aldrich

Nickel(II) oxide, green, −325 mesh, 99%

203882

Sigma-Aldrich

Nickel(II) oxide, 99.99% trace metals basis