Journal
CHEMISTRY-A EUROPEAN JOURNAL
Volume 27, Issue 11, Pages 3766-3771Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/chem.202004271
Keywords
electrocatalysts; heterostructures; hydrogen evolution reaction; NiO; oxygen evolution reaction; oxygen vacancies
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Funding
- Fundamental Research Funds for the Central Universities [2682020CX57]
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The self-assembled 2 D NiO/CeO2 heterostructure exhibits excellent bifunctional catalytic properties for both the HER and OER in alkaline conditions, including low onset overpotential, good durability, and large active surface area.
The development of high-efficiency bifunctional electrocatalysts toward the hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) in alkaline surroundings is essential and challenging for the large-scale generation of clean hydrogen. Herein, a novel self-assembled two-dimensional (2 D) NiO/CeO2 heterostructure (HS) consisting of NiO and CeO2 nanocrystals is prepared through a facile two-step approach, and utilized as an enhanced bifunctional electrocatalyst for the HER and OER under alkaline conditions. It is concluded that this 2 D NiO/CeO2 HS, rich in oxygen vacancies, demonstrates attractive electrocatalytic properties for both the HER and OER in 1 m KOH, including low onset overpotential (eta(1)), eta(10) and Tafel slope, excellent durability, as well as large active surface area. Therefore, the self-assembled 2 D NiO/CeO2 HS is believed to be an efficient bifunctional electrocatalyst toward the HER and OER.
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