Chemical Structure and Distribution in Nickel–Nitrogen–Carbon Catalysts for CO<sub>2</sub> Electroreduction Identified by Scanning Transmission X-ray Microscopy
Chunyang Zhang, Ladan Shahcheraghi, Fatma Ismail, Haytham Eraky, Hao Yuan, Adam P. Hitchcock, Drew Higgins
Abstract
/C sites were notably demonstrated by spectroscopy to possess a variety of chemical structures with a spectroscopic signature that most closely resembles nickel(II) tetraphenylporphyrin molecules. The quantification and spatial distribution mapping of atomically dispersed Ni active sites achieved by STXM address a target that was elusive to the scientific community despite its importance in guiding advanced material designs.
Topics & Concepts
CatalysisNickelMaterials scienceScanning transmission electron microscopyElectrocatalystSpectroscopyX-ray absorption fine structureTransmission electron microscopyCarbon fibersScanning electron microscopeNanotechnologyAnalytical Chemistry (journal)Chemical engineeringChemistryElectrochemistryOrganic chemistryElectrodePhysical chemistryComposite materialPhysicsComposite numberQuantum mechanicsMetallurgyEngineeringCO2 Reduction Techniques and CatalystsAdvanced Electron Microscopy Techniques and ApplicationsElectrocatalysts for Energy Conversion