Layered transition-metal hydroxides for alkaline hydrogen evolution reaction

Publication date: April 2020Source: Chinese Journal of Catalysis, Volume 41, Issue 4Author(s): Qianfeng Liu, Erdong Wang, Gongquan SunAbstractHydrogen is a promising sustainable energy to replace fossil fuels owning to its high specific energy and environmental friendliness. Alkaline water electrolysis has been considered as one of the most prospective technologies for large scale hydrogen production. To boost the sluggish kinetics of hydrogen evolution reaction (HER) in alkaline media, abundant materials have been designed and fabricated. Herein, we summarize the key achievements in the development of layered transition-metal hydroxides [TM(OH)x] for efficient alkaline HER. Based on the structure of TM(OH)x, the mechanism of synergistic effect between TM(OH)x and HER active materials is illuminated firstly. Then, recent progress of TM(OH)x-based HER catalysts to optimize the synergistic effect are categorized as TM(OH)x and active materials, including species, structure, morphology and interaction relationship. Furthermore, TM(OH)x-based overall water splitting electrocatalysts and electrodes are summarized in the design principles for high activity and stability. Finally, some of key challenges for further developments and applications of hydrogen production are proposed.Graphical AbstractAlthough TM(OH)x is poor in HER, when it decorated to HER active materials, the corresponding hybrid with synergistic effect can obviously promote their HER performance in alkaline electro...
Source: Chinese Journal of Catalysis - Category: Chemistry Source Type: research