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Balamurugan Muthukutty,Jaysiva Ganesamurthi,Tse-Wei Chen,Shen-Ming Chen,Jaysan Yu,Xiaoheng Liu 한국공업화학회 2022 Journal of Industrial and Engineering Chemistry Vol.106 No.-
Owing to the enhanced electrical conductivity, sensitivity, selectivity, cost-effective, and simple samplingmethods, rare-earth pyrochlore structured stannates (M2Sn2O7) have been referred to as an elegant systemfor electrochemical sensing applications. Because of this, novel pyrochlore structure lanthanum stannatenanoparticles (La2Sn2O7 NPs) was synthesized via an eco-friendly method and further characterizedthrough various spectroscopic & microscopic techniques. The electrocatalytic property of La2Sn2O7 NPswas examined by fabricating it over a glassy carbon electrode (La2Sn2O7 NPs/GCE) in acidic media as aworking electrolyte. The effect of variables such as the amount of La2Sn2O7 NPs suspension and pH ofthe solution was optimized. Subsequently, after optimizing measurement conditions, the proposedLa2Sn2O7 NPs sensor shows excellent selectivity, sensitivity, linear ranges (0.01 to 127 mM & 127–1437mM), the limit of detection (6 nM) and limit of quantification (0.10 mM). The active sites, presence of metaloxide bonds, higher resistivity, and faster electron mobility paid away for the enhanced electrocatalyticactivity of the proposed sensor. Furthermore, the La2Sn2O7 NPs act as promising electrode modifiers forreal sample investigation of clove samples with accepted recovery rates (86–98%). Hence, the La2Sn2O7NPs sensor act as a hopeful electrode modifier for the determination of eugenol.
Fabrication of efficient electrocatalytic system with ruthenium cobalt sulfide over a carbon cloth
Balamurugan Muthukutty,유효종 한국공업화학회 2022 Journal of Industrial and Engineering Chemistry Vol.113 No.-
Probing effective, highly active, and inexpensive electrocatalysts for oxygen evolution reaction (OER) is ofimmense importance for water electrolysis. Transition metal chalcogenides have been developed as anew class of materials for energy storage and conversion owing to their distinctive properties, such ascapacitance, conductivity, and redox behavior. Three-dimensional carbon cloth (CC), is a unique carbonnetwork with extraordinary flexibility, mechanical stability, and high conductivity for application inenergy-conversion systems. In this study, we designed ruthenium cobalt sulfide over a carbon cloth(RuCoS2/CC) via electrodeposition followed by an immersion technique and applied it for the OER. Themolar ratio for Ru (amount of Ru – 10, 20, 30 mg & immersion time – 3, 6, and 9 h), Co (0.05 to0.3 M), and S (0.05 to 0.2 M) precursors were optimized. Owing to the existence of binary active sites,heteroatoms, and synergetic effect between the transition metal chalcogenides and the carbon substrate,Ru (20 mg immersed for 6 h) at CoS2 (Co – 0.2 M & S2 0.05 M) modified CC (shortly denoted as RuCoS2/CC) exhibits a lower overpotential (315 mV), better Tafel slope (74 mV dec1), and excellent durability(retention rate 94.64%) compared with CoS2/CC and previous studies. Therefore, RuCoS2/CC is perceivedto show better OER performance in the electrocatalysis of water.
Krishnan Venkatesh,Balamurugan Muthukutty,Shen-Ming Chen,Periyakaruppan Karuppasamy,Ahmed S. Haidyrah,Chelladurai Karuppiah,Chun-Chen Yang,Sayee Kannan Ramaraj 한국공업화학회 2022 Journal of Industrial and Engineering Chemistry Vol.106 No.-
This work focussed on the fabrication of synergetic spinel CoMn2O4 embedded reduced graphene oxide(CoMn2O4@RGO) nanocomposite over the surface of modified screen-printed carbon electrode (SPCE) forhighly sensitive and enhanced electrochemical detection of metol (MTL) in 0.05 M phosphate buffer electrolyte. The CoMn2O4@RGO nanocomposite material was synthesized by sonochemical method and wellcharacterizedusing various spectral and analytical (XRD, TGA, Raman spectroscopic, FE-SEM, HR-TEM &EA) techniques. Cyclic and differential pulse voltammetry techniques were used for the detection of MTLat CoMn2O4@RGO modified SPCE. The present electrochemical sensor shows a dynamic linear responserange from 0.01 to 137.65 mM and the detection limit, quantification, sensitivity were estimated to be0.050 mM, 1.64 mM, and 3.77 mA mM1 cm2. Furthermore, the proposed MTL sensor was exhibited numerousadvantages including very ease fabrication, high selectivity, stability, and reproducibility for thedetection of MTL. Based on the obtained experimental data a plausible MTL redox mechanism was proposed. In addition, the present electrochemical sensor was applied in real sample analysis at the spikedsamples (lake water samples + MTL) observed with good recovery results.