Interface Size-Dependent Changes in Activity of Water Splitting Electrocatalysts.

The traditional method of reporting electrocatalytic activity by normalizing current to the geometric area (mA cm) often results in exaggerated activity for electrodes smaller than 1 cm. Using stainless steel 304 (SS-304) and Ni foam electrodes of varying sizes (0.3-2.

Achieving the optimal Ni(OH) : Pt ratio for enhancing electrocatalytic water-dissociation and H delivery in proton-deficient environments.

Despite the availability of abundant, inexpensive non-noble metal-based anode catalysts for alkaline water electrolysis, the cathodic hydrogen evolution reaction (HER) continues to be a challenge, even in the case of state-of-the-art Pt catalysts. In such proton-deficient environments, a metal hydroxide-/oxide-based co-catalyst that can help polarize the H-O bond in water has been found to promote proton abstraction and subsequent reduction into H on Pt and Ru surfaces. In this regard, the Ni(OH) : Pt co-catalyst is one of the best.

CuNi sulphidation maximizes MOR activity by expanding the accessibility of active sites!

Sulphidation of a CuNi alloy of Cu : Ni ratio 81 : 19 led to an exponential activity enhancement in the alkaline methanol oxidation reaction (MOR) by four fold due to an order of magnitude increase in the number of active Cu and Ni sites and improved charge transfer properties.

A tri-functional self-supported electrocatalyst featuring mostly NiTeO perovskite for H production methanol-water co-electrolysis.

A self-supported NiTeO perovskite is made by deploying an extended hydrothermal tellurization strategy with a restricted Te content, which was found to be exceptionally active towards the oxidation of water and methanol and the reduction of water in 1.0 M KOH where it delivered -10 mA cm at just -1.54 V for a full cell featuring MOR‖HER.