Facile Controlling of Active Sites on NiOOH from Nickel Hydroxy‐Muconate for Oxygen Evolution Reaction

作者：I. Rafael Garduño‐Ibarra, Ghita El Hadj, Zhigang Yan, Anne Bonhommé, Mimoune. Aouines, Mathieu S. Prévot, Laurent Djakovitch, P. Vernoux, Jesús González‐Cobos, Adel Mesbah · 发表于：ChemCatChem · 年份：2025 · DOI：10.1002/cctc.202501366 · 被引用次数：4 · 研究领域：Electrocatalysts for Energy Conversion、Advanced battery technologies research、CO2 Reduction Techniques and Catalysts

Abstract A new Ni 2 (OH) 2 (C 6 H 4 O 4 ) metal organic framework (MOF) was synthesized using trans–trans muconic acid as the linker (Ni‐MA) and tested, for the first time, as electrocatalyst precursor for oxygen evolution reaction (OER) in 0.1 M NaOH. After voltammetric activation, carbon paper‐supported Ni‐MA outperformed a commercial Ni(20 wt.%)/C catalyst for OER, reaching 10 mA cm −2 at an overpotential of 400 mV, a Tafel slope value of 84 mV dec −1 , and an outstanding stability at 1.55 V versus RHE, showing a steady‐state current density of 1 mA cm −2 with an OER faradaic efficiency above 93% after 24 h. The influence of the operation conditions on the relative formation of the different NiOOH phases and on the muconate linker degradation was investigated with the assessment of microscopy and Raman spectroscopy, and the observed results were compared with those found in literature using other Ni‐based electrocatalysts. The obtained results stand the nickel hydroxy‐muconate material as a promising precursor to Ni electrocatalyst for OER, by considering that it is a simple monometallic Ni‐MOF material without any added conductive carbon in the catalytic layer formulation, and that it has been tested in mild alkaline conditions and in the absence of any supporting electrolyte.