(Fe, F) co-doped nickel oxyhydroxide for highly efficient oxygen evolution reaction

Wang, Jiajun; Ren, Yanmei; Wang, Ping

doi:10.1039/d2ta09224g

Cited by 24 publications

(15 citation statements)

References 45 publications

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“…The Raman peaks for ZnCoFeS–LDH at 460.48 and 523.27 cm –1 are attributed to the M–O and M–OH bonds (M = Zn, Co), respectively . For the ZnCoFeS–LDH nanostructure, a new peak at 661.03 cm –1 belongs to the Fe–O bond, establishing the successful incorporation of Fe . In addition, the incorporation of Fe and S will cause a broad shift of the related Raman peaks.…”

Section: Resultsmentioning

confidence: 99%

“…46 For the ZnCoFeS−LDH nanostructure, a new peak at 661.03 cm −1 belongs to the Fe−O bond, establishing the successful incorporation of Fe. 47 In addition, the incorporation of Fe and S will cause a broad shift of the related Raman peaks. Furthermore, X-ray photoelectron spectroscopy (XPS) was employed to further investigate the chemical composition and the surface state of the ZnCoFeS−LDH nanostructures, in which Zn, Co, and O and Zn, Co, Fe, S, and O were detected, respectively, in ZnCo−LDH and ZnCoFeS−LDH samples (Figure S4).…”

Section: ■ Introductionmentioning

confidence: 99%

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Morphological and Electronic Regulation of Zn,S-Incorporated FeCo–LDH Nanosheets for Boosting the Bi-Electrocatalytic Oxygen Evolution and Urea Oxidation Reactions

Li,

Zhang,

Chen

et al. 2023

ACS Sustainable Chem. Eng.

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Developing high-performance and low-cost electrocatalysts for the oxygen evolution reaction (OER) and urea oxidation reaction (UOR) is essential for hydrogen production. Herein, we prepared Zn,S-incorporated Fe,Co layered double hydroxide (ZnCoFeS–LDH) nanosheets on nickel foam via a two-step hydrothermal reaction. The attractive two-dimensional (2D) nanosheet morphology with ultrathin thickness offers abundant active sites, promotes the adsorption and desorption of intermediates on the surface, and also facilitates mass transportation. The electronic structure of ZnCoFeS–LDH was modified, which thus improves their conductivity, offers high-valence iron ions (Fe3+), and therefore intrinsically enhances their electrocatalytic properties. In particular, the constructed crystalline/amorphous interfaces benefit electron transfer between different phases. As a proof of concept, we examined the electrocatalytic performances of ZnCoFeS–LDH nanostructures to both the OER and UOR. As a result, the ZnCoFeS–LDH nanosheets exhibit excellent catalytic OER activity, with low overpotentials of 202, 217, 238, and 261 mV to achieve current densities of 10, 20, 50, and 100 mA cm–2, respectively, which are remarkably enhanced in comparison with that of commercial RuO2. Furthermore, they also demonstrate outstanding durability after long-term (48 h) and cycling (5000 cycles) measurements. Moreover, the ZnCoFeS–LDH nanosheets also possess superior UOR activity. The potentials were measured to be as low as 1.313, 1.334, 1.366, and 1.398 V to reach current densities of 10, 20, 50, and 100 mA cm–2, respectively, with high long-term stability after 20 h.

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Section: Resultsmentioning

confidence: 99%

Section: ■ Introductionmentioning

confidence: 99%

Morphological and Electronic Regulation of Zn,S-Incorporated FeCo–LDH Nanosheets for Boosting the Bi-Electrocatalytic Oxygen Evolution and Urea Oxidation Reactions

Li,

Zhang,

Chen

et al. 2023

ACS Sustainable Chem. Eng.

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“…Wang and Ren 121 documented the preparation of benzimidazole derivatives consisting of fluorinated derivatives of substituted 1-ethyl-1 H -benzimidazole, then biologically evaluated these compounds to study their antithrombin activity. The researchers in this study discovered that all the tested compounds 28a – f had better anticoagulant activity against thrombin than argatroban, which was used as a standard drug (Figure 24 ).…”

Section: Biological Activity Of Benzimidazole Derivativesmentioning

confidence: 99%

A Review on Benzimidazole Heterocyclic Compounds: Synthesis and Their Medicinal Activity Applications

Alheety,

Mohammed,

Farhan

et al. 2023

SynOpen

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Benzimidazole is a heterocyclic compound formed by fusing the benzene ring with an imidazole ring that contains two nitrogen atoms. Benzimidazole and its derivatives are prepared in different ways, including condensation of o-phenylenediamine with carbonyl compounds (aldehydes and ketones) or with carboxylic acids and their derivatives. The benzimidazoles can also be prepared by rearranging other heterocyclic compounds such as quinoxaline derivatives, triazole derivatives, etc. In recent decades, benzimidazoles were prepared using green methods such as microwaves, ultrasound, and the use of an environmentally friendly catalyst, as well as photochemical reactions. Benzimidazoles have attracted the interest of scientists and researchers due to the great medical efficacy shown by them for various diseases. The benzimidazole derivatives show many pharmacological activities such as anticancer, anti-inflammatory, antioxidant, anticoagulant, antiviral, etc. This review focuses on shedding light on benzimidazole and its derivatives, the most important methods used to prepare it, as well as the biological applications in our daily lives.

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“…6−11 The rate of oxidation was shown to be linked with the increase in grain boundary energy, the density of fractured bonds at the grain boundary plane, and the energy of metal oxidation on individual facets. 6,7,12,13 This discovery presents a significant challenge to conventional methods of interpreting global electrochemical measurements, which have often been premised on the assumption of uniform metal reactivity. 14−17 Simultaneously, it is important to note that global reactivity cannot be solely inferred from measurements of isolated nanoscopic areas.…”

Section: ■ Introductionmentioning

confidence: 99%

Deciphering the Interplay between Local and Global Dynamics of Anodic Metal Oxidation

Makogon,

Noël,

Kanoufi

et al. 2024

Anal. Chem.

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The stark difference between global and local metal oxidation dynamics underscores the need for methodologies capable of performing precise sub-μm-scale and wide-field measurements. In this study, we present reflective microscopy as a tool developed to address this challenge, illustrated by the example of chronoamperometric Fe oxidation in a NaCl solution. Analysis at a local scale of 10 s of μm has revealed three distinct periods of Fe oxidation: the initial covering of the metal interface with a surface film, followed by the electrochemical conversion of the formed surface film, and finally, the in-depth oxidation of Fe. In addition, thermodynamic calculations and the quantitative analysis of changes in optical signal (light intensity), correlated with variations in refractive indexes, suggest the initial formation of maghemite, followed by its subsequent conversion to magnetite. The reactivity maps for all three periods are heterogeneous, which can be attributed to the preferential oxidation of certain crystallographic grains. Notably, at the global scale of 100 s of μm, reactivity initiates at the electrode border and progresses toward its center, demonstrating a unique pattern that is independent of the local metal structure. This finding underscores the significance of simultaneously employing subμm-precise, quantitative, and wide-field measurements for a comprehensive description of metal oxidation processes.

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(Fe, F) co-doped nickel oxyhydroxide for highly efficient oxygen evolution reaction

Abstract: In the study of earth-abundant oxygen evolution reaction (OER) electrocatalysts, cation-doping is an extensively used strategy to boost the catalytic performance, whereas anion-doping is a promising yet premature approach that...

Cited by 24 publications

References 45 publications

Morphological and Electronic Regulation of Zn,S-Incorporated FeCo–LDH Nanosheets for Boosting the Bi-Electrocatalytic Oxygen Evolution and Urea Oxidation Reactions

Morphological and Electronic Regulation of Zn,S-Incorporated FeCo–LDH Nanosheets for Boosting the Bi-Electrocatalytic Oxygen Evolution and Urea Oxidation Reactions

A Review on Benzimidazole Heterocyclic Compounds: Synthesis and Their Medicinal Activity Applications

Deciphering the Interplay between Local and Global Dynamics of Anodic Metal Oxidation

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