Tailoring atomically dispersed cobalt–nitrogen active sites in wrinkled carbon nanosheets via “fence” isolation for highly sensitive detection of hydrogen peroxide

Abstract

Stable and highly sensitive determination of hydrogen peroxide (H2O2) is needed in various fields ranging from disease prevention to environmental protection. The construction of inexpensive and highly active transition-metal-based nitrogen-doped...

Structure–Activity Relationship for the Catalytic Hydrogenation of Nitrobenzene by Single Platinum Atoms Supported on Nitrogen-Doped Carbon

“…Then, the strong interaction between N and NPs can also improve the stability of supported NPs. − In published works, it was confirmed that N-doped carbon materials were an excellent support for the dispersion of Pt, Pd, Ru, Cu, , ZnO, and so forth. These hybrids exhibited prominent performance in heterogeneous catalysis, energy storage, sensors, and drug-delivery platforms. − …”

Pyrolyzed cobalt hexacyanocobaltate dispersed on reduced-graphene-oxide as an electrocatalyst of the oxygen reduction reaction in an alkaline medium

“…Such behavior may be related to the formation of CoN sites This journal is © The Royal Society of Chemistry 2023 during pyrolysis, which have been shown to electrochemically catalyze H 2 O 2 oxidation. [100][101][102] In this regard, the formation of CoN during pyrolysis was demonstrated by spectroscopic data (Fig. 4).…”

Single-atom catalysts: promotors of highly sensitive and selective sensors

“…Hu et al also explored controllably dispersed atomic Co-N sites on nitrogen-doped carbon nanosheets by a dual-template (ZIF and g-C 3 N 4 ) method. 171 The catalyst with 4% Co (44% Co would aggregate into NPs) achieved a high sensitivity of 605.50 mA mM À1 cm À2 for 0.5 Â 10 À3 -1 Â 10 À1 M H 2 O 2 and a low LOD of 6.18 Â 10 À9 M.…”

“…Cobalt is highly selective for two-electron transfer, which can provide adequate sites for H 2 O 2 sensing. [168][169][170][171] Our group developed an atomic Co-N x -C site anchored neuronal-like carbon-modified amperometric sensor (Fig. 16c), which exhibited a broad detection range (250 nM-50 mM), high sensitivity (743.3 mA mM À1 cm À2 ), strong selectivity, robust reliability (2.86% decay for one week) and fast response (5 s) for residual H 2 O 2 detection.…”