Double metal-organic frameworks derived Fe-Co-Ni phosphides nanosheets as high-performance electrocatalyst for alkaline electrochemical water splitting

An efficient bi-functional electrocatalyst, FeCoNiP@C/nickel foam (NF) toward electrochemical overallwater-splitting has been developed through a facile high-temperature phosphorization strategy using corresponding metal-organic framework as starting materials. The catalyst exhibited excellent oxygen evolution reaction (eta(100) = 227 mV), hydrogen evolution reaction (eta(100) = 136 mV) and overall-water-splitting abilities (cell voltages = 1.60 V) in 1.0 M KOH to reach the current density of 100 mA/cm(2), respectively. The striking catalytic performances may be attributable to the hydrophilic and aerophobic characteristics of the multi-component chainmail electrocatalyst on NF that are easily in contact with the electrolyte to avoid the charge transfer impediment of the conventional conductive adhesive and to cause the generated bubbles to escape quickly. More importantly, the synergistic effect produced by the multi-component phosphides greatly increases the electrocatalytic performance of the sample. (C) 2020 Elsevier Ltd. All rights reserved.

Automated summary

An efficient bi-functional electrocatalyst FeCoNiP@C/NF has been developed for electrochemical overall water-splitting. The catalyst exhibited excellent OER, HER, and overall water-splitting abilities in 1.0 M KOH to reach a current density of 100 mA/cm(2).