In-situ synthesis of encapsulated N-doped carbon metal oxide nanostructures for Zn-air battery applications

Flores-Lasluisa, J.X.; García-Rodríguez, M.; Cazorla-Amorós, D.; Morallón, E.

doi:10.1016/j.carbon.2024.119147

Cited by 7 publications

(2 citation statements)

References 75 publications

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“…Flores-Lasluisa et al reported the in situ sol–gel preparation of N-doped La, Mn, and Co-based materials with varying compositions. 158 Physical activation with CO 2 was subsequently performed to create porosity, which increased the number of accessible active sites including Co-N x -C sites, Co/MnO heterointerfaces, and graphitic N groups. These results demonstrate the remarkable ORR and OER performances of the composites.…”

Section: Different Nanostructure Electrocatalysts and Their Oer Perfo...mentioning

confidence: 99%

Sol–gel-derived nanostructured electrocatalysts for oxygen evolution reaction: a review

De,

Kim,

Adhikari

et al. 2024

J. Mater. Chem. A

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Section: Different Nanostructure Electrocatalysts and Their Oer Perfo...mentioning

confidence: 99%

Sol–gel-derived nanostructured electrocatalysts for oxygen evolution reaction: a review

De,

Kim,

Adhikari

et al. 2024

J. Mater. Chem. A

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“…The main limitation for large-scale implementation in primary ZABs is the slow kinetics of the oxygen reduction reaction (ORR) [8][9][10]. While noble metal catalysts like Pt/C demonstrate excellent ORR activity, their high cost and scarcity render them unsuitable for large-scale applications.…”

Section: Introductionmentioning

confidence: 99%

Enhancing Interaction between Lanthanum Manganese Cobalt Oxide and Carbon Black through Different Approaches for Primary Zn–Air Batteries

García-Rodríguez,

Flores-Lasluisa,

Cazorla-Amorós

et al. 2024

Materials

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Due to the need for decarbonization in energy generation, it is necessary to develop electrocatalysts for the oxygen reduction reaction (ORR), a key process in energy generation systems such as fuel cells and metal–air batteries. Perovskite–carbon material composites have emerged as active and stable electrocatalysts for the ORR, and the interaction between both components is a crucial aspect for electrocatalytic activity. This work explores different mixing methods for composite preparation, including mortar mixing, ball milling, and hydrothermal and thermal treatments. Hydrothermal treatment combined with ball milling resulted in the most favorable electrocatalytic performance, promoting intimate and extensive contact between the perovskite and carbon material and improving electrocatalytic activity. Employing X-ray photoelectron spectroscopy (XPS), an increase in the number of M-O-C species was observed, indicating enhanced interaction between the perovskite and the carbon material due to the adopted mixing methods. This finding was further corroborated by temperature-programmed reduction (TPR) and temperature-programmed desorption (TPD) techniques. Interestingly, the ball milling method results in similar performance to the hydrothermal method in the zinc–air battery and, thus, is preferable because of the ease and straightforward scalability of the preparation process.

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Eco‐Friendly Mechanochemical Synthesis of Bifunctional Metal Oxide Electrocatalysts for Zn‐Air Batteries

García‐Rodríguez,

Cazorla‐Amorós,

Morallón

2024

ChemSusChem

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The development of green and environmentally friendly synthesis methods of electrocatalysts is a crucial aspect in decarbonizing energy generation. In this study, eco‐friendly mechanochemical synthesis of perovskite metal oxide‐carbon black composites is proposed using different conditions and additives such as KOH. Furthermore, the optimization of ball milling conditions, including time and rotational speed, is studied. The mechanochemical synthesis in solid‐state conditions without additives produces electrocatalysts that exhibit the highest bifunctional electrochemical activity towards both oxygen reduction reaction (ORR) and oxygen evolution reaction (OER). Moreover, this synthesis demonstrates a lower Environmental Impact Factor (E‐factor), indicating its greener nature, and due to its simplicity, it has a great potential for scalability. The obtained bifunctional electrocatalysts have been tested in a rechargeable zinc‐air battery (ZAB) for 22 h with similar performance compared to the commercial catalyst (Pt/C) at significantly lower cost. These promising findings are attributed to the enhanced interaction between the perovskite metal oxide and carbon material and the improved dispersion of the perovskite metal oxide on the carbon materials.

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In-situ synthesis of encapsulated N-doped carbon metal oxide nanostructures for Zn-air battery applications

Cited by 7 publications

References 75 publications

Sol–gel-derived nanostructured electrocatalysts for oxygen evolution reaction: a review

Sol–gel-derived nanostructured electrocatalysts for oxygen evolution reaction: a review

Enhancing Interaction between Lanthanum Manganese Cobalt Oxide and Carbon Black through Different Approaches for Primary Zn–Air Batteries

Eco‐Friendly Mechanochemical Synthesis of Bifunctional Metal Oxide Electrocatalysts for Zn‐Air Batteries

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