The Roles of Composition and Mesostructure of Cobalt-Based Spinel Catalysts in Oxygen Evolution Reactions.

By using the crystalline precursor decomposition approach and direct co-precipitation the composition and mesostructure of cobalt-based spinels can be controlled. A systematic substitution of cobalt with redox-active iron and redox-inactive magnesium and aluminum in a cobalt spinel with anisotropic particle morphology with a preferred 111 surface termination is presented, resulting in a substitution series including Co O , MgCo O , Co FeO , Co AlO and CoFe O . The role of redox pairs in the spinels is investigated in chemical water oxidation by using ceric ammonium nitrate (CAN test), electrochemical oxygen evolution reaction (OER) and H O decomposition.

Liquid-Phase Cyclohexene Oxidation with O over Spray-Flame-Synthesized La Sr CoO Perovskite Nanoparticles.

La Sr CoO (x=0, 0.1, 0.2, 0.

Clinical and histologic findings in temporal triangular alopecia.

Background: Temporal triangular alopecia (TTA; also called "congenital triangular alopecia") is a common disorder that is assumed to be congenital. Little is known about its histologic features.

Objective: Our purpose was to describe four new cases, review the literature, and present histologic features based on vertical and transverse sectioning.