Recent progress in water splitting and hybrid supercapacitors based on nickel-vanadium layered double hydroxides

Environmentally friendly energy sources alternatives to fossil fuels such as solar and wind are strategic for meeting the needs of an increasingly energy demanding society, despite their periodic/intermittent nature. Thus, urge the development of clean and renewable energy sources such as based on solar energy and water in a cyclic way, by photoinduced water-splitting and regeneration in fuel cells. In this context, energy storage devices such as hybrid supercapacitors become fundamental for realization of a sustainable society. In this review, the early discovery and recent advances concerning synthetic strategies, hierarchical structures, and oxygen evolution reaction (OER)/hydrogen evolution reactions (HER) catalytic performances of nickel-vanadium double hydroxides (NiV-LDHs) based nanomaterials are summarized. A discussion about the role of vanadium ions in HER/OER was also included, highlighting the recent progress in theoretical calculations in this field. Finally, some hybrid supercapacitor electrode materials based on NiV-LDHs are described, including the strategies to circumvent the parasitic oxygen evolution reaction during charge-discharge of those energy storage devices. In short, catalysts for HER/OER and hybrid supercapacitor electrode materials based on NiV-LDHs were reviewed considering their key multifunctional role in the way to a more sustainable society.