In Situ Tracking of Ni‐MOF Reconstruction into Active Ni(OH) 2 OER Catalysts

Abstract The oxygen evolution reaction (OER) remains a key bottleneck in electrochemical energy storage and conversion. In this work, we demonstrate the transmutation of a Ni‐based metal‐organic framework (Ni‐MOF), composed of one‐dimensional Ni–( μ 3 ‐OH)/( μ 2 ‐H 2 O)–Ni chains interconnected by 1,4‐ndc linker, into catalytically active β ‐Ni(OH) 2 . This top‐down reconstruction strategy involves the disintegration of 1,4‐ndc linker and transformation of 1D Ni–( μ 3 ‐OH)/( μ 2 ‐H 2 O)–Ni chains (which act as precursors), into ultra‐low‐dimensional (thickness ∼ 1.5–2.6 nm), defect‐rich β ‐Ni(OH) 2 structure. The activated catalyst achieves a low overpotential of 300 mV at 10 mA.cm −2 , surpassing commercial…

• DO
  Department of Science and Technology, Ministry of Science and Technology, India

  Award: DST/INSPIRE/04/2022/002447