Dual Modulation of Lattice Strain and Charge Polarization Induced by Co(OH)2/Ni(OH)2 Interfaces for Efficient Oxygen Evolution Catalysis

Two-dimensional transition metal hydroxides are greatly limited in the application of electrocatalytic oxygen evolution reaction (OER) due to its large and inert basal planes. Herein, we report a one-step in-situ...

Interfacial Electronic Coupling of Ultrathin Transition-Metal Hydroxides Nanosheets with Layered MXene as a New Prototype for Platinum-Like Hydrogen Evolution

Metal hydroxides and oxides have emerged as fascinating materials and key structures for electrocatalysis, but they are rarely investigated for HER. Herein, we introduce unique transition-metal hydroxides@MXene (TMHs@MXene) hybrids, including...

Rationally designed transition metal hydroxide nanosheet arrays on graphene for artificial CO2 reduction

The performance of transition metal hydroxides, as cocatalysts for CO2 photoreduction, is significantly limited by their inherent weaknesses of poor conductivity and stacked structure. Herein, we report the rational assembly of a series of transition metal hydroxides on graphene to act as a cocatalyst ensemble for efficient CO2 photoreduction. In particular, with the Ru-dye as visible light photosensitizer, hierarchical Ni(OH)2 nanosheet arrays-graphene (Ni(OH)2-GR) composites exhibit superior photoactivity and selectivity, which remarkably surpass other counterparts and most of analogous hybrid photocatalyst system. The origin of such superior performance of Ni(OH)2-GR is attributed to its appropriate synergy on the enhanced adsorption of CO2, increased active sites for CO2 reduction and improved charge carriers separation/transfer. This work is anticipated to spur rationally designing efficient earth-abundant transition metal hydroxides-based cocatalysts on graphene and other two-dimension platforms for artificial reduction of CO2 to solar chemicals and fuels.