Posted: Jul 20, 2017 (Nanowerk Spotlight) Developing highly active electrocatalysts for photoelectrochemical water splitting is critical to bringing solar/electrical-to-hydrogen energy conversion processes into reality.
Non-noble metal chalcogenides, typically nickel selenide (Ni3Se2) nanosheets, have attracted enormous attention recently due to their high catalytic activity and abundance in nature.
However, the poor electronic conductivity and instability of Ni3Se2 significantly impedes its practical application in commercial alkali electrolyzer systems.
Fabrication of Ni-based functional hybrid materials possessing strong coupling effects between different components is a promising pathway to improve the overall water splitting activity and stability of the active components.
Metallic cobalt sulfide (Co9S8) nanosheets are one of the most ideal candidates for the preparation of Ni-based (e.g., Ni3Se2 nanosheets) hybrids owing to the high electrical conductivity associated with their unique layered structure.
Prof. Xinliang Feng, Technische Universität Dresden, Germany and colleagues have developed a novel 3D hierarchical hybrid electrocatalyst consisting of Co9S8 nanosheets strongly coupled with vertical Ni3Se2 nanosheets grown on electrochemically exfoliated graphene.
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