Role of metal (Cu/Ni/Fe/Co)-carbon composite in enhancing electro-oxidation of ethylene glycol

Gupta, Saptarshi; De, Mahuya

doi:10.1007/s10800-023-01883-2

Cited by 3 publications

(1 citation statement)

References 42 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Because dependency on precious metals presents an economic barrier, recently, nonprecious-metal-based electrocatalysts, e.g., Ni, Fe, Co, and Cu, ,,, have been explored for EGO to FA. Their higher oxidation states act as potent active sites for alcohol electrooxidation, and among them, Ni has a particularly low work function that allows ready formation of Ni III in basic media . A heterostructured Ni-based material incorporating an element with a higher redox potential in a high oxidation state, e.g., Cu II , could not only provide an additional active site for EGO but also drain the electron density from Ni to facilitate the generation of highly active Ni III .…”

Section: Introductionmentioning

confidence: 99%

Sustainable Formate Synthesis: Integrating Ethylene Glycol Oxidation with Carbon Dioxide Electrocatalysis Using Redox-Stabilized Earth-Abundant Electrodes

Bashir,

McGettrick,

Kühnel

et al. 2024

ACS Sustainable Chem. Eng.

View full text Add to dashboard Cite

Carbon dioxide electroreduction (CO 2 ER) coupled with water oxidation (oxygen evolution reaction, OER) presents a promising solution for effectively mitigating global warming. However, this process is compromised by the sluggish OER, which yields only undesirable O 2 . Here, we couple selective CO 2 ER with partial ethylene glycol oxidation (EGO) to concurrently produce formate in both half-reactions. The enhancement of active sites and optimization of formate selectivity are the principal objectives during the design of both electrodes. For CO 2 ER, redox stabilization of Sn-based cathodes is investigated via Pb doping, thus ultimately improving the Faradaic efficiency from 68% to ∼89%. To replace OER with EGO, we employed CuO@Ni(OH) 2 on copper foam, reducing the applied potential by 200 mV at 50 mA/cm 2 . Finally, an EGO-coupled CO 2 electrolyzer achieves 10 mA/cm 2 at an overall cell voltage 180 mV lower than that of a conventional CO 2 electrolyzer. This study showcases the integration of divergent electrochemical processes for concurrent electrosynthesis without precious metals to achieve cost-effective and sustainable formate production from CO 2 and plastic waste.

show abstract

Section: Introductionmentioning

confidence: 99%

Sustainable Formate Synthesis: Integrating Ethylene Glycol Oxidation with Carbon Dioxide Electrocatalysis Using Redox-Stabilized Earth-Abundant Electrodes

Bashir,

McGettrick,

Kühnel

et al. 2024

ACS Sustainable Chem. Eng.

View full text Add to dashboard Cite

show abstract

High-performance spinel NiMn2O4 supported carbon felt for effective electrochemical conversion of ethylene glycol and hydrogen evolution applications

Medany,

Hefnawy,

Kamal

2024

Sci Rep

View full text Add to dashboard Cite

One of the most effective electrocatalysts for electrochemical oxidation reactions is NiMn2O4 spinel oxide. Here, a 3-D porous substrate with good conductivity called carbon felt (CF) is utilized. The composite of NiMn2O4-supported carbon felt was prepared using the facile hydrothermal method. The prepared electrode was characterized by various surface and bulk analyses like powder X-ray diffraction, X-ray photon spectroscopy (XPS), Scanning and transmitted electron microscopy, thermal analysis (DTA), energy dispersive X-ray (EDX), and Brunauer–Emmett–Teller (BET). The activity of NiMn2O4 toward the electrochemical conversion of ethylene glycol at a wide range of concentrations was investigated. The electrode showed a current density of 24 mA cm−2 at a potential of 0.5 V (vs. Ag/AgCl). Furthermore, the ability of the electrode toward hydrogen evaluation in an alkaline medium was performed. Thus, the electrode achieved a current density equal 10 mA cm−2 at an overpotential of 210 mV (vs. RHE), and the provided Tafel slope was 98 mV dec−1.

show abstract

Design and Performance of CuNi-rGO and Ag-CuNi-rGO Composite Electrodes for Use in Fuel Cells

Shaban,

Mohamed,

Kordy

et al. 2024

Catalysts

View full text Add to dashboard Cite

This work developed new electrocatalysts for direct alcohol oxidation fuel cells (DAFCs) by using graphene and reduced graphene oxides (GO and rGO) as supporting nanomaterials for copper–nickel (CuNi) nanocomposites. The manufacture of CuNi, CuNi-GO, and CuNi-rGO nanocomposites was realized through the adaptation of Hummer’s method and hydrothermal techniques, with subsequent analysis using a range of analytical tools. The electrocatalytic behavior of these materials in DAFCs, with methanol and ethanol as the fuels, was scrutinized through various methods, including cyclic voltammetry, linear sweep, chronoamperometry, and electrochemical impedance spectroscopy. This investigation also assessed the stability and charge transfer dynamics. The rGO-based CuNi nanocomposite demonstrated a remarkable performance boost, showing increases of approximately 319.6% for methanol and 252.6% for ethanol oxidation compared to bare CuNi. The integration of silver nanoparticles into the Ag-CuNi-rGO electrode led to a current density surge to 679.3 mA/g, which signifies enhancements of 254.2% and 812.6% relative to the CuNi-rGO and CuNi electrodes, respectively. These enhancements are ascribed to the augmented densities of hot sites and the synergistic interactions within the nanocatalysts. The findings underscore the potential of Ag and rGO as effective supports for CuNi nanocomposites, amplifying their catalytic efficiency in DAFC applications.

show abstract

Role of metal (Cu/Ni/Fe/Co)-carbon composite in enhancing electro-oxidation of ethylene glycol

Cited by 3 publications

References 42 publications

Sustainable Formate Synthesis: Integrating Ethylene Glycol Oxidation with Carbon Dioxide Electrocatalysis Using Redox-Stabilized Earth-Abundant Electrodes

Sustainable Formate Synthesis: Integrating Ethylene Glycol Oxidation with Carbon Dioxide Electrocatalysis Using Redox-Stabilized Earth-Abundant Electrodes

High-performance spinel NiMn2O4 supported carbon felt for effective electrochemical conversion of ethylene glycol and hydrogen evolution applications

Design and Performance of CuNi-rGO and Ag-CuNi-rGO Composite Electrodes for Use in Fuel Cells

Contact Info

Product

Resources

About