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Herein, facet‐engineered Cu2O nanostructures are synthesized by wet chemical methods for electrocatalytic HER, and it is found that the octahedral Cu2O nanostructures with exposed crystal planes of (111) (O‐Cu2O) has the best hydrogen evolution performance. Operando Raman spectroscopy and ex‐situ characterization techniques showed that Cu2O is reduced during HER, in which Cu dendrites are grown on...
Defect‐rich MoS2 ultrathin nanosheets are synthesized on a gram scale for electrocatalytic hydrogen evolution. The novel defect‐rich structure introduces additional active edge sites into the MoS2 ultrathin nanosheets, which significantly improves their electrocatalytic performance. Low onset overpotential and small Tafel slope, along with large cathodic current density and excellent durability, are...
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