No abstract

Among a plethora of transition-metal catalysts explored for the oxygen evolution reaction (OER) in water electrolysis, the use of chromium (Cr) as a component, has only recently started to gain momentum. In this review, recent investigations where Cr has been utilised for alkaline OER has been summarised and evaluated. The Cr-based electrocatalysts have been categorised and discussed according to their anion counterparts. From the majority of reviewed studies, Cr comes across as a beneficial co-catalyst owing to its ability to act as either an electron acceptor or electron donor. This characteristic property stems from the many possible oxidation states of Cr, with Cr 3 + and Cr 6 + being the most pronounced states. This review emphasises on providing a holistic view of the role Cr plays in OER electrocatalysis, focussing mainly on the correlations of activity, structure, and electronic configuration.

No abstract

Tunable compositions of Pd100−xCux towards the electrooxidation of ethanol and ethylene glycol have been examined. The Pd70Cu30 exhibited the highest activity and stability.

Electronegative Au improves the oxidation kinetics of Pd by inducing a downshift of the d-band center and increasing the coverage of adsorbed hydroxyls.