研究目的
Developing highly efficient oxygen evolution reaction (OER) electrocatalysts by tuning size and morphology and exploiting new catalytic materials.
研究成果
The CCO nanoplates synthesized through PVP-assisted hydrothermal method exhibit outstanding electrocatalytic activity and good long-term stability toward the OER, requiring a low overpotential of 390 mV to attain an anodic current density of 10 mA cm-2. This highlights the importance of size and morphology of CCO for use in OER electrocatalysis.
研究不足
The synthesis of phase-pure and size-tunable delafossite oxides has been challenging, especially at nanoscale. The difficulty lies in the delicate control of hydrolysis and oxidation state of metal species during hydrothermal synthesis.
1：Experimental Design and Method Selection:
A PVP-assisted hydrothermal method was used to synthesize CuCoO2 (CCO) nanoplates. The influence of hydrothermal reaction parameters on the morphology, size, and crystal phase of CCO crystals was investigated.
2：Sample Selection and Data Sources:
Precursors containing Cu(NO3)2?3H2O, Co(NO3)2?6H2O, PVP, and NaOH were dissolved in deionized water for hydrothermal reactions.
3：List of Experimental Equipment and Materials:
XRD, SEM, TEM, and XPS were used for characterization.
4：Experimental Procedures and Operational Workflow:
Hydrothermal reactions were conducted at various temperatures and durations, with different precursor compositions and PVP quantities.
5：Data Analysis Methods:
The electrocatalytic performance was evaluated using cyclic voltammetry (CV), and the OER activity was compared based on overpotential and Tafel slope.
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