Cobalt modulated local electronic environment of NiCoMnCuFe high-entropy alloys for stable overall water splitting

Key Points

• To investigate the impact of cobalt modulation on the electronic environment of NiCoMnCuFe high-entropy alloys for efficient water splitting.
• Designed a cobalt-modulated NiCoMnCuFe alloy anchored on reduced graphene oxide (NiCoMnCuFe/RGO)
• Evaluated electrocatalytic performance through oxygen evolution reaction (OER) and hydrogen evolution reaction (HER) measurements
• Measured Tafel slopes to assess catalytic efficiency
• Achieved low Tafel slopes of 38.1 mV·dec−1 for OER and 64.1 mV·dec−1 for HER
• Demonstrated excellent performance indicating high efficiency for overall water splitting
• Revealed that cobalt modulation significantly enhances the local electronic environment