Rational Design of N-Doped Carbon Nanocage-Equipped Co-N_x Active Sites for Oxidase Mimicking and Sensing Applications

Rational design of high-performance nanozyme is of great significance for sensing applications. Here, N-doped carbon nanocages containing Co-Nx active sites (CoNx-NC) were fabricated by simple acid etching of Co@NC, which is the product of Co–Co Prussian blue analogues carbonized in an N2 atmosphere. Both optimized Co@NC-650 and CoNx-NC-650 exhibit catalase- and oxidase-like properties. They rapidly decompose H2O2 into O2 and oxidize colorless...