articleJournal of the American Chemical SocietySep 9, 2015Closed access

High-Index Faceted Ni 3 S 2 Nanosheet Arrays as Highly Active and Ultrastable Electrocatalysts for Water Splitting

State Key Laboratory of Inorganic Synthesis and Preparative Chemistry · Jilin University · +1 more institution

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Abstract

Elaborate design of highly active and stable catalysts from Earth-abundant elements has great potential to produce materials that can replace the noble-metal-based catalysts commonly used in a range of useful (electro)chemical processes. Here we report, for the first time, a synthetic method that leads to in situ growth of {2̅10} high-index faceted Ni3S2 nanosheet arrays on nickel foam (NF). We show that the resulting material, denoted Ni3S2/NF, can serve as a highly active, binder-free, bifunctional electrocatalyst for both the hydrogen evolution reaction (HER) and the oxygen evolution reaction (OER). Ni3S2/NF is found to give ∼100% Faradaic yield toward both HER and OER and to show remarkable catalytic…

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