Electrosynthetic Multimetallic Mof-Derived Transition Metal Phosphides: Mechanistic Insights into Bifunctional Water Electrolysis Catalysis

Abstract

Developing cost-effective and efficient non-precious metal bifunctional catalysts is essential for alkaline electrolysis of water. In this paper, MOF was in-situ grown on foam nickel by electrodeposition, and then a polymetallic phosphide (NCFZMP/NF) was constructed by pyrolysis of MOF. NCFZMP/NF has excellent conductivity and some lattice distortions due to the presence of multi metal phosphides. At the same time, the nitrogen doped porous material formed by pyrolysis of MOF maximizes the utilization of active sites. Therefore, NCFZMP/NF has lower HER and OER overpotentials, lower transfer resistance, and better electrocatalytic durability. Only 1.61V is needed to achieve alkaline overall water splitting. This experiment determined the construction of multi metal phosphide catalysts and emphasized the scientific research and practical application potential of multi metals in the field of new energy catalysis

Keywords: Mental organic frameworks, Polymetallic phosphides, Bifunctional water electrolysis catalysts