In-Situ Formation of NiFe-MOF on Nickel Foam as a Self-Supporting Electrode for Flexible Electrochemical Sensing and Energy Conversion

Ni- and Fe-based metal-organic frameworks (NiFe-MOFs) have abundant valence states the potential to be used as bifunctional electrode materials. However, unannealed NiFe-MOFs are still not widely in materials, including electrochemical sensing, supercapacitors, overall water splitting. In addition, direct growth of active material on a conductive carrier has been developed binder-free strategy for preparation. This avoids use insulating binders additional treatments, simplifies preparation process NiFe-MOFs, improves conductivity mechanical stability electrode. Therefore, this study, we employed simple solvothermal method combined with an situ technique directly grow NiFe-MOF-X (X = 4, 8, 12) nanomaterials different sizes morphologies nickel foam at low reaction temperatures times. The NiFe-MOF-8 exhibited high capacitive properties, area-specific capacitance 5964 mF cm−2 2 mA excellent durability. On other hand, NiFe-MOF-12 strong catalytic activity electrocatalytic tests performed 1 M KOH aqueous solution, demonstrating hydrogen evolution (η10 150 mV) oxygen (η50 362 activities. sensing demonstrated good response BPA. Overall, our results suggest that using is promising strategy.