Amperometric sensing of hydrogen peroxide via an ITO electrode modified with gold nanoparticles electrodeposited on a CoMn-layered double hydroxide

Insights into the Structure and the Electrochemical Reactivity of Cobalt-Manganese Layered Double Hydroxides: Application to H2O2 Sensing

“…Regarding XRD data, impurities were observed in many cases, while the purest reported Co R Mn-LDH phases display a poor crystallinity. 31,36,37,54,59 So far, no investigation has been done on Co R Mn-LDH chemistry and structure while applications for such layered materials have been emerging.…”

“…Due to the combination of mixed valence states of cobalt and manganese, CoMn-LDHs have demonstrated interesting electrochemical properties as such oxygen evolution catalysts ,− and pseudo-supercapacitors. − However, so far, only Xu et al have mentioned the use of CoMn-LDH combined with gold nanoparticles (AuNPs) for H 2 O 2 electrodetection. They have reported that CoMn-LDH is a good support for the electrodeposition of AuNPs.…”

Recent developments in emerging two-dimensional materials and their applications

“…The as-obtained results were also correlated with those of MgMn-LDHs or CoAl-LDHs, and it was inferred that the presence of a binary TM in the LDH layers results in multiple interactions and nanoscale interfusion cooperation between Au-NP and the CoMn-LDH support. 361 Clinical diagnosis of diabetes involves exploring abnormalities in blood glucose levels due to malfunctioning pancreatic b cells; these cells are responsible for insulin generation, which controls the blood glucose levels in the body and metabolic disorders. 362 Some lethal diseases, such as cardiac, renal, nervous, and ocular diseases, are directly connected with life-threateningly high blood glucose levels.…”

Electrochemical Deposition of Nanomaterials for Electrochemical Sensing

“…To overcome this problem an electrochemical sensor for H 2 O 2 has been fabricated by electrodepositing Au-NPs (average size = 12 nm) on an ITO support previously coated with a Co, Mn-based layered double hydroxide. Electrochemical characterizations proved that the presence of the LDH support significantly improved the voltammetric response to H 2 O 2 [ 33 ]. At a working voltage of +0.55 V (vs. Ag/AgCl), the sensor displayed a wide linear range (0.1 μM to 1.27 mM), low detection limit (0.06 μM) and high sensitivity.…”

“…Xu et al prepared a nanocomposite made of Au-NPs and Co/Mn LDH on an ITO electrode to fabricate a hydrogen peroxide sensor that displayed good stability and optimum electrocatalytic activity toward H 2 O 2 oxidation. The excellent performance of the sensor can be attributed to the multiple synergetic effects between Au-NPs and the Co/Mn LDH support that reduce the size of the nanoparticles and improve the conductivity of the composite material [ 33 ]. A sensor for H 2 O 2 was also developed exploiting a composite material made of Ag dendrites and LDH, obtained by electrodeposition of the nanostructures on a GCE previously coated with a Mg/Al LDH [ 66 ].…”