Molecular Weight Engineering Modulates Lignin‐Metal Supramolecular Framework to Construct Carbon‐Coated CoRu Alloy for Effective Overall Water Splitting

Abstract To overcome the challenges of low catalytic activity and instability, a molecular weight engineering strategy coupled with oxidative ammonolysis is developed to synthesize CoRu‐based alloy catalysts with distinct morphologies and properties from biorefinery lignin. This approach effectively modulates intrinsic active sites and exposes unsaturated nitrogen‐oxygen structures, thereby tailoring the morphology and defect structure of the carbon layers in the catalysts. The as‐synthesized CoRu alloy catalysts from lignin precursors with varying molecular weights are designated as CoRu@OALC‐EtOAC, CoRu@OALC‐EtOH, and CoRu@OALC‐Residual. CoRu@OALC‐EtOAC, featuring a defect‐rich graphitic carbon‐coated CoRu…

• NN
  National Natural Science Foundation of China

  Awards: U23A6005, 22178069, 22038004