A facile synthesis of CeO2 from the GO@Ce-MOF precursor and its efficient performance in the oxygen evolution reaction

Abstract

Electrochemical water splitting has enticed fascinating consideration as a key conduit for the advancement of renewable energy systems. Fabricating adequate electrocatalysts for water splitting is fervently preferred to curtail their overpotentials and hasten practical utilizations. In this work, a series of Ce-MOF, GO@Ce-MOF, calcinated Ce-MOF, and calcinated GO@Ce-MOF were synthesized and used as high-proficient electrocatalysts for the oxygen evolution reaction. The physicochemical characteristics of the prepared samples were measured by diverse analytical techniques including SEM, HRTEM, FTIR, BET, XPS, XRD, and EDX. All materials underwent cyclic voltammetry tests and were evaluated by electrochemical impedance spectroscopy and oxygen evolution reaction. Ce-MOF, GO@Ce-MOF, calcinated Ce-MOF, and calcinated GO@Ce-MOF have remarkable properties such as enhanced specific surface area, improved catalytic performance, and outstanding permanency in the alkaline solution (KOH). These factors upsurge ECSA and intensify the OER performance of the prepared materials. More exposed surface active-sites present in calcinated GO@Ce-MOF could be the logic for superior electrocatalytic activity. Chronoamperometry of the catalyst for 15°h divulges long-term stability of Ce-MOF during OER. Impedance measurements indicate higher conductivity of synthesized catalysts, facilitating the charge transfer reaction during electrochemical water splitting. This study will open up a new itinerary for conspiring highly ordered MOF-based surface active resources for distinct electrochemical energy applications.

A highly effective peroxidase-mimic nanozyme of S, N-carbon dot-decorated cerium organic framework-based colorimetric detection of Hg2+ ion and thiophanate methyl

“…The above-mentioned peaks were associated with the stretching vibrations of carboxylate ions. 41 This demonstrates that the carboxylate ions present in this material are to be observed and conrms the coordination between the carboxylate group of the organic linker and Ce. The C-S stretching vibrations present in S, N-CDs slightly shied at 1050 cm −1 .…”

MOF/graphene oxide based composites in smart supercapacitors: a comprehensive review on the electrochemical evaluation and material development for advanced energy storage devices

“…6 shows the energy storage mechanism of a supercapacitor based on MOF/ GO composites which can be made using a variety of techniques, each with its own benets and drawbacks. These include postsynthesis, [118][119][120][121] in situ growth, [122][123][124][125][126] solvothermal, [127][128][129][130][131] co-precipitation, 132,133 mixing, 134,135 and ultrasonication. [136][137][138][139][140] Supercapacitor applications require careful consideration of various factors in order to make certain that the nished product possesses the appropriate electrochemical properties and performance.…”

“…6 shows the energy storage mechanism of a supercapacitor based on MOF/GO composites which can be made using a variety of techniques, each with its own benefits and drawbacks. These include post-synthesis, 118–121 in situ growth, 122–126 solvothermal, 127–131 co-precipitation, 132,133 mixing, 134,135 and ultrasonication. 136–140…”

An easy approach towards once a day sustained release dosage form using microporous Cu-MOFs as drug delivery vehicles

“…21 A wide variety of metal objects in stable oxidation states such as alkali metals, alkaline earth metals, rare earth elements and transition metals have been effectively used for designing diversified MOFs. The attraction of merging attributes from both organic and inorganic components affording sturdy porous structure, interesting architecture and versatile functionality has led to a quest of research toward new hybrid materials, having wide variety of potential applications in gas storage, 22 purification, 23 molecular sensing, 24 biomedical application, 25 drug delivery, 26 biomedicine, 27 molecular based magnetisms, 28,29 catalysis, 30,31 batteries, 32 CO 2 adsorption, 22 oxygen evolution reaction, 33 CO 2 conversion, 34,35 gas purification, 22 and photocatalysis. 36 In recent decades, nanoscale MOFs have received a great deal of attention in the area of particlemediated medication delivery.…”