Hydrazine Oxidation Electrocatalysis

Burshtein, Tomer Y.; Yasman, Yakov; Muñoz-Moene, Lisa; Zagal, José H.; Eisenberg, David

doi:10.1021/acscatal.3c05657

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ACS Catal.

2024

DOI: 10.1021/acscatal.3c05657

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Hydrazine Oxidation Electrocatalysis

Tomer Y. Burshtein,

Yakov Yasman,

Lisa Muñoz-Moene

et al.

Abstract: The electro-oxidation of hydrazine is important for direct hydrazine fuel cells and for fundamental understanding of electrocatalysis in the nitrogen cycle. In this Review, we discuss electrocatalysis of the hydrazine oxidation reaction (HzOR), spanning a vast range of metal surfaces, nanoparticles, atomically dispersed ions, organometallic macrocycles, and enzymes. Emphasis is given to structure−activity correlations and reactivity descriptors, including the formulation of the Zagal principle, an electrochemi… Show more

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Cited by 10 publications

References 281 publications

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Electrochemical Oxidation of Small Molecules for Energy‐Saving Hydrogen Production

Sun,

Xu,

Fei

et al. 2024

Advanced Energy Materials

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Electrochemical water splitting is a promising technique for the production of high‐purity hydrogen. Substituting the slow anodic oxygen evolution reaction with an oxidation reaction that is thermodynamically more favorable enables the energy‐efficient production of hydrogen. Moreover, this approach facilitates the degradation of environmental pollutants and synthesis of value‐added chemicals through the rational selection of small molecules as substrates. Strategies for small‐molecule selection and electrocatalyst design are critical to electrocatalytic performance, with a focus on achieving a high current density, selectivity, Faradaic efficiency, and operational durability. This perspective discusses the key factors required for further advancement, including technoeconomic analysis, new reactor system design, meeting the requirements of industrial applications, bridging the gap between fundamental research and practical applications, and product detection and separation. This perspective aims to advance the development of hybrid water electrolysis applications.

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Electrochemical Oxidation of Small Molecules for Energy‐Saving Hydrogen Production

Sun,

Xu,

Fei

et al. 2024

Advanced Energy Materials

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Electrocatalysis Using Cobalt Porphyrin Covalently Linked with Multi‐Walled Carbon Nanotubes: Hydrazine Sensing and Hydrazine‐Assisted Green Hydrogen Synthesis

Tasleem,

Singh,

Tiwari

et al. 2024

Small

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Acid‐treated multi‐walled carbon nanotube (MWCNT) covalently functionalized with cobalt triphenothiazine porphyrin (CoTriPTZ‐OH) A3B type porphyrin, containing three phenothiazine moieties (represented as MWCNT‐CoTriPTZ) is synthesized and characterized by various spectroscopic and microscopic techniques. The nanoconjugate, MWCNT‐CoTriPTZ, exhibits a pair of distinct redox peaks due to the Co2+/Co3+ redox process in 0.1 M pH 7.0 phosphate buffer. Further, it electrocatalytically oxidizes hydrazine at a low overpotential with a high current. This property is advantageously utilized for the sensitive determination of hydrazine. The developed electrochemical sensor exhibits high sensitivity (0.99 µAµM−1cm−2), a low limit of detection (4.5 ppb), and a broad linear calibration range (0.1 µM to 3.0 mM) for the determination of hydrazine. Further, MWCNT‐CoTriPTZ is exploited for hydrazine‐assisted green hydrogen synthesis. The high efficiency of hydrazine oxidation is confirmed by the low onset potential (0.45 V (vs RHE)) and 0.60 V (vs RHE) at the current density of 10 mA.cm−2. MWCNT‐CoTriPTZ displays a high current density (77.29 mA.cm−2) at 1.45 V (vs RHE).

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High‐Performance Bifunctional Electrocatalysts for Flexible and Rechargeable Zn–Air Batteries: Recent Advances

Song,

Huang,

et al. 2024

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Flexible rechargeable Zn–air batteries (FZABs) exhibit high energy density, ultra‐thin, lightweight, green, and safe features, and are considered as one of the ideal power sources for flexible wearable electronics. However, the slow and high overpotential oxygen reaction at the air cathode has become one of the key factors restricting the development of FZABs. The improvement of activity and stability of bifunctional catalysts has become a top priority. At the same time, FZABs should maintain the battery performance under different bending and twisting conditions, and the design of the overall structure of FZABs is also important. Based on the understanding of the three typical configurations and working principles of FZABs, this work highlights two common strategies for applying bifunctional catalysts to FZABs: 1) powder‐based flexible air cathode and 2) flexible self‐supported air cathode. It summarizes the recent advances in bifunctional oxygen electrocatalysts and explores the various types of catalyst structures as well as the related mechanistic understanding. Based on the latest catalyst research advances, this paper introduces and discusses various structure modulation strategies and expects to guide the synthesis and preparation of efficient bifunctional catalysts. Finally, the current status and challenges of bifunctional catalyst research in FZABs are summarized.

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Hydrazine Oxidation Electrocatalysis

Cited by 10 publications

References 281 publications

Electrochemical Oxidation of Small Molecules for Energy‐Saving Hydrogen Production

Electrochemical Oxidation of Small Molecules for Energy‐Saving Hydrogen Production

Electrocatalysis Using Cobalt Porphyrin Covalently Linked with Multi‐Walled Carbon Nanotubes: Hydrazine Sensing and Hydrazine‐Assisted Green Hydrogen Synthesis

High‐Performance Bifunctional Electrocatalysts for Flexible and Rechargeable Zn–Air Batteries: Recent Advances

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