Metal-support interactions alter the active species on IrO_x for electrocatalytic water oxidation

Abstract

Constructing metal-support interaction (MSI) is a widely concerned strategy to promote the electrocatalytic performance of oxygen evolution reaction (OER). However, studies helping to understand the electrocatalytic behavior of reactive centers...

Infrared Spectroscopic Observation of Oxo- and Superoxo-Intermediates in the Water Oxidation Cycle of a Molecular Ir Catalyst

“…These observations suggest the presence of another species at more anodic potentials. The band at ∼1146 cm –1 falls into the range where superoxo species are known to absorb. − First, we excluded the possibility that the band arises from an irreversibly adsorbed catalytic species on the surface. Following the spectroelectrochemical experiments with the Ir-dimer (Figure A), we conducted spectroelectrochemical experiments with the same electrode but without the Ir-dimer in solution (Figure S12, Supporting Information).…”

The in situ phosphorization inducing oxygen vacancies in the core–shell structured NiFe oxides boosts the electrocatalytic activity for the oxygen evolution reaction

“…6 Noble metal (Ir and Ru) based electrocatalysts show a good OER activity; however, the scarcity and high cost seriously restrict their wide application. 7,8 In recent years, researchers have revealed that transition metal-based oxides, 9–11 sulfides, 12,13 phosphides, 14,15 carbides 2,16,17 and alloys 18,19 also show promising catalytic properties for both the HER and OER, which are expected to replace precious metal oxide electrocatalysts.…”