A perovskite-type KNbO3 nanoneedles based biosensor for direct electrochemistry of hydrogen peroxide
Source abstract
Abstract
Abstract A KNbO 3 nanoneedles (KNs) based hydrogen peroxide (H 2 O 2 ) biosensor was first proposed. Perovskite-type KNs can directly catalyze H 2 O 2 . The mechanism can be explained by Molecular Orbital Principles, with the formation of σ-bonding between the e g orbital of surface niobium ions and surface adsorbed oxygen-related intermediate species. Direct electron transfer between the Horseradish peroxidase (HRP) and electrode surface was achieved. Co-catalyst system of both HRP and KNbO 3 was introduced to the oxidation of H 2 O 2 , thus the as-prepared biosensor exhibited high sensitivity (750 μA mM −1 cm −2 ) and ultrafast response (1–2 s) to H 2 O 2 . Therefore, KNs provide a promising material for enzymes assembly and sensing application.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Electrochemical sensors and biosensors · Electrochemical Analysis and Applications · Advanced Nanomaterials in Catalysis
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