Hydrazine Hydrate Induced Two-Dimensional Porous Co3+ Enriched Co3O4 Nanosheets for Enhanced Water Oxidation Catalysis

• DOI: 10.1021/acssuschemeng.0c02421
• Publication Date: 2020-06-10T01:47:02Z
• Authors: Runzhe Chen; Yangyang Tan; Zeyi Zhang; Zhao Lei; Wei Wu; Niancai Cheng; Shichun Mu
• Keywords: Overpotential; Oxygen evolution; Hydrazine (antidepressant)

Herein, a hydrazine hydrate (N2H4) induced sacrificial template method is reported for controlled synthesis of 2D porous Co3O4 nanosheets (p-Co3O4 NSs) with adjustable thickness and abundant hierarchical pore structure. The introduction N2H4 modulates the density Co2+ anchored on surface GO by adjusting number oxygen functional groups Co2+/GO composites then controls electronic valence during subsequent pyrolysis in air. As result, optimized p-Co3O4 NSs have ultrathin thickness, structure, high Co3+/Co2+ ratio. expected, it exhibits excellent OER catalytic performance 1 M KOH solutions, affording lower overpotential 1.50 V at 10.0 mA cm–2 robust stability compared to pristine RuO2 as benchmark. outstanding activity ascribed its structure pores theory (DFT) calculations reveal that layer ratio enhance through promoting dissociation water OH* accelerating kinetics alkaline media.