Efficient Electrocatalysts for Alkaline Oxygen Evolution Reaction from Wolframite Derived Heteroatom Materials

New materials for oxygen evolution reaction (OER) electrocatalysts in alkaline conditions have been highly investigated in recent years for the advancement of water splitting. However, questions such as the lack of stability and the use of noble metals as electrocatalysts still need to be addressed. In this study, we report the synthesis and electrocatalytic properties of a series of wolframite tungsten-based materials (MWO4, M=Fe, Mn, Ni, Co) towards OER in basic conditions. Our results showed that Ni0.5Mn0.5WO4 is a promising electrocatalyst, exhibiting ease of preparation, stability over the course of our experiments, and OER activity comparable to the standard iridium oxide. This study highlights the potential of wolframite tungsten-based materials as a new class of electrocatalysts for OER in alkaline conditions. Wolframite-based nanomaterials were synthesized and structurally characterized to develop a novel class of electrocatalysts for the Oxygen Evolution Reaction (OER) in an alkaline medium. The most active materials were found to be an heterometallic structure composed of nickel, manganese, and tungsten, denoted as Ni0.5Mn0.5WO4, and exhibited promising stability measurements. image