LAUSR

Electrocatalysis based energy production is one of the efficient and potential means of energy conversion, with minimal environmental footprint. To enhance reaction rates, catalysts are required to minimize overpotential. Alternatives to noble metal electrocatalysts are essential to address the needs of scale. In this context, transition metal nitride (TMN) nanoparticles have attracted significant attention due to their high catalytic activity, distinctive electronic structures, and enhanced surface morphologies. Nickel based oxygen evolution reaction (OER) electrocatalysts are an ideal choice due to its abundant availability and comparatively low cost when compared to noble metals. In this review, we have critically evaluated advancements made specifically in Ni-based binary and ternary TMNs oxygen evolution electrocatalysts. Ni-based nanomaterials having 3D-architectures when used as OER electrocatalysts with a suitable support (i.e. foam support) speeds up electron transfer due to well oriented crystal structure and also assist intermediate diffusion and during reactions evolved gases. 2D Ni-based nitride sheet materials synthesized without supports are usually better performing than 3D-support electrocatalysts. The focus of this mini review is a systematic description of OER activity in the state of the art Ni-based nitrides nanostructured electrocatalysts.