Developing efficient bifunctional electrocatalysts for overall water splitting remains a major challenge, often requiring complex and time-consuming synthesis procedures. Here, we report a simple and rapid strategy to electrosynthesize NiFe-based layered double hydroxides (LDHs) on glassy carbon electrodes modified with ultra-small citrate-coated pyramidal platinum nanoparticles (PtNPs). By tuning the PtNP surface density, we observed a clear positive correlation between nanoparticle loading and hydrogen evolution reaction (HER) activity. In addition, the PtNPs significantly improved electron transfer and catalytic performance toward the oxygen evolution reaction (OER). Under alkaline conditions, the optimized hybrid catalyst required only 35 mV of over-potential at 10 mA/cm2 for HER and 310 mV for OER. Furthermore, a two-electrode cell assembled with grafoil electrodes modified with PtNPs-LDH enabled efficient overall water splitting, operating at 1.76 V to deliver 10 mA/cm2 with outstanding stability over 24 h.
Dolci, L.S., Gualandi, I., Mariani, F., De Maron, J., Tosi Brandi, E., Moglianetti, M., et al. (2026). Layered configuration of NiFe layered double hydroxides catalysts and pyramidal pt nanoparticles as a bifunctional catalyst for water splitting reaction. JOURNAL OF ELECTROANALYTICAL CHEMISTRY, 1015, 120233-120233 [10.1016/j.jelechem.2026.120233].
Layered configuration of NiFe layered double hydroxides catalysts and pyramidal pt nanoparticles as a bifunctional catalyst for water splitting reaction
Dolci L. S.;Gualandi I.;Mariani F.;De Maron J.;Tosi Brandi E.;Basile F. L.;Scavetta E.
2026
Abstract
Developing efficient bifunctional electrocatalysts for overall water splitting remains a major challenge, often requiring complex and time-consuming synthesis procedures. Here, we report a simple and rapid strategy to electrosynthesize NiFe-based layered double hydroxides (LDHs) on glassy carbon electrodes modified with ultra-small citrate-coated pyramidal platinum nanoparticles (PtNPs). By tuning the PtNP surface density, we observed a clear positive correlation between nanoparticle loading and hydrogen evolution reaction (HER) activity. In addition, the PtNPs significantly improved electron transfer and catalytic performance toward the oxygen evolution reaction (OER). Under alkaline conditions, the optimized hybrid catalyst required only 35 mV of over-potential at 10 mA/cm2 for HER and 310 mV for OER. Furthermore, a two-electrode cell assembled with grafoil electrodes modified with PtNPs-LDH enabled efficient overall water splitting, operating at 1.76 V to deliver 10 mA/cm2 with outstanding stability over 24 h.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
