Highly efficient tungsten/molybdenum-based electrocatalysts for the oxygen reduction reaction: a review

Sun, Guiru; Liu, Xiaobin; Mao, Huimin; Wu, Siqi; Liu, Yanru; Wang, Tianshi; Chi, Jingqi; Wang, Lei

doi:10.1039/d3qi01797d

Cited by 6 publications

(2 citation statements)

References 207 publications

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“…The diffusion convection current steadily increases with increased rotation rates, indicating a greater oxygen flux towards the disc electrode even while the onset potential did not change. 90,91 The Koutecky-Levich (K-L) equation was used to calculate the number of electrons transported (n) per oxygen molecule engaged in the ORR at the AgCoS@MXene electrode:…”

Section: Resultsmentioning

confidence: 99%

Synergistic Advancements in Battery-Grade Energy Storage: AgCoS@MXene@AC Hybrid Electrode Material as an Enhanced Electrocatalyst for Oxygen Reduction Reaction

Imran,

Ahmad,

Yasmeen

et al. 2024

ECS J. Solid State Sci. Technol.

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In this work, we present a highly effective electrode material (AgCoS@MXene) for supercapattery device application that is produced hydrothermally. We examined the morphology and crystallinity of the synthesized materials using SEM and XRD studies. The synthesized compounds were subjected to a thorough electrochemical performance study employing a three-electrode configuration in a 1 M KOH electrolyte. AgCoS@MXene demonstrated an exceptional Qs of 943.22 C/g at a current density of 2.0 A/g. We formed a supercapattery device (AgCoS@MXene//AC) with AgCoS@MXene as the positive electrode and activated carbon (AC) as the negative electrode. The supercapattery device was demonstrated to have a high specific capacity of 315.22 C/g, a power density of 1275 W/kg, and an energy density of 35.94 Wh/kg. In addition, 5000 charging and discharging cycles were used to assess the device's long-term longevity. The findings indicated that the device preserved nearly 82% of its initial capacity. Besides, the hybrid electrode is used for the electrocatalytic activity for the oxygen reduction reaction

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Section: Resultsmentioning

confidence: 99%

Synergistic Advancements in Battery-Grade Energy Storage: AgCoS@MXene@AC Hybrid Electrode Material as an Enhanced Electrocatalyst for Oxygen Reduction Reaction

Imran,

Ahmad,

Yasmeen

et al. 2024

ECS J. Solid State Sci. Technol.

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“…The electrocatalytic oxygen reduction reaction (ORR) is an important process on the cathode of metal–air batteries and fuel cells. 7–9 However, the reaction kinetics of the ORR on the cathode is slow, only about one-sixth of the rate of the hydrogen oxidation reaction (HOR) on the anode of fuel cells, 10–12 which largely limits their commercial applications on various occasions. So far, the most used commercial catalyst is platinum particles supported on carbon materials (Pt/C).…”

Section: Introductionmentioning

confidence: 99%

Carboxylate trapping engineering to fabricate monodispersed dual-atom iron sites for efficient oxygen reduction

Chu,

Wu,

Qiu

et al. 2024

Inorg. Chem. Front.

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A Fully‐Bioresorbable Nanostructured Molybdenum Oxide‐Based Electrode for Continuous Multi‐Analyte Electrochemical Sensing

Fernandes,

Franceschini,

Smets

et al. 2024

Adv Materials Inter

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Bioresorbable electrochemical sensors remain mostly unexplored despite their ability to provide continuous in situ measurements of critical biomarkers. The primary challenge arises from the direct exposure of the electrodes’ thin metal films to biofluids, which poses difficulties in ensuring both proper operational lifetimes and sensing performance. Molybdenum (Mo) presents itself as a promising biometal due to its uniquely gradual dissolution in biofluids, facilitated by the formation of a slower‐dissolving MoOx surface layer. Consequently, carefully engineered MoOx films can endow transient electrochemical sensors with unparalleled stability during extended operational lifetimes. Herein an unprecedented sensor architecture achieved via the unique pairing of sputtered Mo and MoOx thin films, probed as a pH and dissolved oxygen sensor is reported. Compared to a bare Mo electrode, a bilayer Mo+MoOx electrode subjected to post‐deposition annealing (400 °C, 60 min, N2 environment) displayed a largely improved stability (>24 h) in solution and demonstrated predictable functionality during ongoing film dissolution at 37 °C. Collectively, this work establishes a pioneering strategy for the fabrication of reliable and clinically relevant implantable electrochemical sensors.

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Highly efficient tungsten/molybdenum-based electrocatalysts for the oxygen reduction reaction: a review

Abstract: The mechanisms, synthesis methods and strategies for application of W/Mo-based ORR electrocatalysts are briefly introduced. Recent advances in W/Mo-based ORR electrocatalysts are discussed in detail.

Cited by 6 publications

References 207 publications

Synergistic Advancements in Battery-Grade Energy Storage: AgCoS@MXene@AC Hybrid Electrode Material as an Enhanced Electrocatalyst for Oxygen Reduction Reaction

Synergistic Advancements in Battery-Grade Energy Storage: AgCoS@MXene@AC Hybrid Electrode Material as an Enhanced Electrocatalyst for Oxygen Reduction Reaction

Carboxylate trapping engineering to fabricate monodispersed dual-atom iron sites for efficient oxygen reduction

A Fully‐Bioresorbable Nanostructured Molybdenum Oxide‐Based Electrode for Continuous Multi‐Analyte Electrochemical Sensing

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