Metal–Organic Frameworks for Electrocatalytic Sensing of Hydrogen Peroxide

The electrochemical detection of hydrogen peroxide (H₂O₂) has become more and more important in industrial production, daily life, biological process, green energy chemistry, and other fields (especially for the detection of low concentration of H₂O_2). Metal organic frameworks (MOFs) are promising candidates to replace the established H₂O₂ sensors based on precious metals or enzymes. This review summarizes recent advances in MOF-based H₂O₂ electrochemical sensors, including conductive MOFs, MOFs with chemical modifications, MOFs-composites, and MOF derivatives. Finally, the challenges and prospects for the optimization and design of H₂O₂ electrochemical sensors with ultra-low detection limit and long-life are presented.

Crystallinity dependence for high-selectivity electrochemical oxygen reduction to hydrogen peroxide

We report a semiconducting metal-organic graphene analog, Ni₃(HITP)₂, with an adjustable crystalline structure for mediating efficient selectivity toward hydrogen peroxide. The as-prepared 5-Ni₃(HITP)₂ catalyst with low crystallinity can electrocatalyze O₂ to H₂O₂ with a high selectivity of 80% over a wide potential range of 0.2-0.6 V vs. RHE and with a large mass activity of 292 A g_Ni^-1 at 0.25 V in 0.1 M KOH.

Ni–Mo modified metal–organic frameworks for high-performance supercapacitance and enzymeless H2O2 detection

The growth process for A(B)-Ni_xMo_y-MOFs@AAC hybrids.