Synthesis of ZnO-loaded Co0.85Se nanocomposites and their enhanced performance for decomposition of hydrazine hydrate and catalytic hydrogenation of p-nitrophenol

Xu, Tingting; Zhang, Jie; Song, Ji‐Ming; Niu, Helin; Mao, Chang‐Jie; Zhang, Shengyi; Shen, Yuhua

doi:10.1016/j.apcata.2016.01.042

Cited by 22 publications

(9 citation statements)

References 51 publications

(33 reference statements)

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“…The experiments utilized a Jasco V-730 spectrophotometer whose sample compartment was retrofitted with sample holders able to support 38 mL Borofloat 33 floated borosilicate flat glass cuvettes with a 2.5 cm path length (Specialty Glass ProductsWillow Grove, PA). For each reaction, three 8 mL solutions were prepared: (i) 150 μM 4-NP, (ii) NaBH 4 (6,9,12,15,30,45,60,75 or 90 mM), and (iii) Au catalysts (0.324, 0.648, or 1.626 μM). All three solutions utilized DI water with the ambient dissolved oxygen content, but for the case of the Au catalyst, the stock solution was deaerated.…”

Section: ■ Methodsmentioning

confidence: 99%

Catalytic Reduction of 4-Nitrophenol by Gold Catalysts: The Influence of Borohydride Concentration on the Induction Time

et al. 2019

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A comprehensive mechanistic framework is key to the effective utilization of model catalytic reactions. Although the reduction of 4-nitrophenol by borohydride has emerged as one of the most widely used model reactions for accessing the catalytic activity of nanostructures, there still exist knowledge gaps. The cause of the induction time, which is a period at the beginning of the reaction where no reaction seemingly occurs, has long been the subject of debate. Recent work provides compelling experimental evidence that links the induction time to the consumption of dissolved oxygen within the aqueous reactants and provides a mechanistic understanding based on a previously unknown side reaction. A concern has, however, been raised that the proposed mechanism is unable to account for prior work showing the induction time to be independent of the borohydride concentration. Here, a systematic study is presented that re-examines this dependency where reactions are simultaneously monitored using spectroscopy and an in situ dissolved oxygen probe. The dependency is shown to be far more involved than prior studies suggest because it varies with the amount of catalyst added. The understanding obtained is consistent with the previously proposed mechanism for the induction time and resolves perceived inconsistencies with earlier work.

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Section: ■ Methodsmentioning

confidence: 99%

Catalytic Reduction of 4-Nitrophenol by Gold Catalysts: The Influence of Borohydride Concentration on the Induction Time

et al. 2019

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“…41 The small peak at 53.4 eV corresponds to Fe 3p, and the peaks at 58.4 and 60 eV originate from Co 3p 3/2 and Co 3p 1/2 , respectively, suggesting the presence of Co−Se and Fe−Se binding. 42 The S5a2). These peaks are, respectively, assigned to the metal oxides (M−O) and the adsorbed oxygen species FeFe@CoFe into hollow CoFe-PBA.…”

Section: ■ Results and Discussionmentioning

confidence: 98%

“…The two peaks centered at 53.7 and 54.6 eV (Se 3d 5/2 and Se 3d 3/2 ) are attributed to the selenide species, whereas the peak at 55.6 eV corresponds to the metal-state Se . The small peak at 53.4 eV corresponds to Fe 3p, and the peaks at 58.4 and 60 eV originate from Co 3p 3/2 and Co 3p 1/2 , respectively, suggesting the presence of Co–Se and Fe–Se binding …”

Section: Resultsmentioning

confidence: 99%

Mesoporous Nanostructured CoFe–Se–P Composite Derived from a Prussian Blue Analogue as a Superior Electrocatalyst for Efficient Overall Water Splitting

Cui

et al. 2018

ACS Appl. Energy Mater.

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Electrocatalytic water splitting requires the development of attractive and earth-abundant catalysts. In this work, a novel four-part electrocatalyst of mesoporous cobalt/iron phosphorus−selenide nanocomposite (CoFe−Se−P) was derived from hollow CoFe Prussian blue analogues (CoFe-PBA) and combined by phosphatization and selenylation. This novel electrocatalyst displays an efficient and durable bifunctional catalysis performance for hydrogen evolution reaction (HER) and oxygen evolution reaction (OER). In view of strong electron interaction among Co, Fe, Se, and P, this four-part electrocatalyst exhibits a lower onset potential of −35.9 mV and an overpotential of −172.5 mV at a current density of 10 mA cm −2 in acidic solution for HER. In alkaline solution, the onset potential and the overpotential are maintained at approximately −33 and −183.1 mV, respectively. Moreover, the proposed CoFe−Se−P catalyst possesses superior OER performance with a lower onset potential of 1.07 V and overpotential of 1.44 V at a current density of 10 mA cm −2 in 0.1 M KOH solution. The versatile electrocatalyst can catalyze water splitting in a two-electrode system at a potential of 1.59 V. The proposed strategy offers insight into the rational design and development of promising electrode materials with distinct architectures for electrochemical energy storage and conversion.

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“…Multiphase solid materials with nano-dimensional ZnO particles have also been used for the development of effective sensors for hydrazine molecules. These multiphase solid materials with ZnO have a direct influence on their size, interfacial properties, and electrocatalytic activities against harmful analytes [ 58 ]. It was found that most of the electrochemical-based sensing of hydrazine molecules using ZnO nanoparticles have mainly used nafion for the tight attachment of ZnO nanomaterials on the surface of gold electrodes.…”

Section: Chemical Sensing Applications Of Zno Nanomaterialsmentioning

confidence: 99%

Chemical Sensing Applications of ZnO Nanomaterials

et al. 2018

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Recent advancement in nanoscience and nanotechnology has witnessed numerous triumphs of zinc oxide (ZnO) nanomaterials due to their various exotic and multifunctional properties and wide applications. As a remarkable and functional material, ZnO has attracted extensive scientific and technological attention, as it combines different properties such as high specific surface area, biocompatibility, electrochemical activities, chemical and photochemical stability, high-electron communicating features, non-toxicity, ease of syntheses, and so on. Because of its various interesting properties, ZnO nanomaterials have been used for various applications ranging from electronics to optoelectronics, sensing to biomedical and environmental applications. Further, due to the high electrochemical activities and electron communication features, ZnO nanomaterials are considered as excellent candidates for electrochemical sensors. The present review meticulously introduces the current advancements of ZnO nanomaterial-based chemical sensors. Various operational factors such as the effect of size, morphologies, compositions and their respective working mechanisms along with the selectivity, sensitivity, detection limit, stability, etc., are discussed in this article.

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Synthesis of ZnO-loaded Co0.85Se nanocomposites and their enhanced performance for decomposition of hydrazine hydrate and catalytic hydrogenation of p-nitrophenol

Cited by 22 publications

References 51 publications

Catalytic Reduction of 4-Nitrophenol by Gold Catalysts: The Influence of Borohydride Concentration on the Induction Time

Catalytic Reduction of 4-Nitrophenol by Gold Catalysts: The Influence of Borohydride Concentration on the Induction Time

Mesoporous Nanostructured CoFe–Se–P Composite Derived from a Prussian Blue Analogue as a Superior Electrocatalyst for Efficient Overall Water Splitting

Chemical Sensing Applications of ZnO Nanomaterials

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