Manganese Oxoborate‐Based Nanostructures as Novel Oxygen Evolution Catalysts in Neutral Media

Abstract The development of electrocatalysts for the OER (oxygen evolution reaction) process is an ongoing challenge in producing sustainable energy systems. Herein, we report QS (quasi‐spherical), IR (irregular), and NR (nanorod) Mn₂OBO₃ (manganese oxoborate), modified with a carbon support, as candidate electrocatalysts for OER in a neutral medium. QS‐, IR‐ and NR‐Mn₂OBO₃ catalysts displayed low onset potentials of 201 mV, 205 mV, and 208 mV and Tafel slope results of 94 mV dec⁻¹, 97 mV dec⁻¹, and 106 mV dec⁻¹, respectively. As a result of the long‐term stability tests, it was determined that the NR‐Mn₂OBO₃ sample was extremely stable compared to the QS‐ and IR‐catalysts. This work introduces a new Mn₂OBO₃/C composite catalyst that displays efficient OER performance at a neutral medium and provides a different perspective for catalyst development strategies.