Hollow mesoporous CuCo₂O₄ microspheres derived from metal organic framework: A novel functional materials for...

Hollow mesoporous CuCo₂O₄ (meso-CuCo₂O₄) microspheres were successfully synthesized by decomposing metal-organic frameworks (MOFs) as the template. The as-prepared CuCo₂O₄ microspheres were first simultaneously used for H₂O₂ biosensing and glucose biofuel cell (GFC) as the enzyme mimic. The resulting of meso-CuCo₂O₄ displayed not only excellent catalytic performances to H₂O₂ including a super-fast response time (within 2s), a super-high sensitivity (654.23 μA mM^-1 cm^-2) and a super-low detection limit (3nM at S/N = 3) on the sensor, but also great values in GFC as anode material with an open circuit voltage of 0.85V, a maximum power density of 0.33 mWcm^-2 and a limiting current density of 1.27 mAcm^-2, respectively. The preeminent catalytic abilities to H₂O₂ and glucose may be attributed to the surpassing intrinsic catalytic activity of CuCo₂O₄ and large specific area of mesoporous structure. These significant findings deriving from this work not only provided a novel exploration for the fabrication of hollow spherical mesoporous bimetallic oxides, but also promoted the development of the supersensitive detection of H₂O₂ and non-enzymatic biofuel cell.