Effect of Ni/Co mass ratio and NiO–Co3O4 loading on catalytic performance of NiO–Co3O4/Nb2O5–TiO2 for direct synthesis of 2-propylheptanol from n-valeraldehyde

Zhao, Lili; An, Hualiang; Zhao, Xinqiang; Wang, Yanji

doi:10.1039/d0ra08903f

Cited by 11 publications

(4 citation statements)

References 20 publications

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“…Similar to natural enzymes, diverse experimental conditions can affect the peroxidase-like properties of NiCo 2 S 4 (PVP) NPs and NiCo 2 S 4 (CTAB) NPs, such as the reaction temperature and pH. , We choose NiCo 2 S 4 (PVP) NPs, which had higher catalytic activity, for the optimization experiment. Figure S7a shows the improvement of the solution in absorbance along with the enhancement concentration of NiCo 2 S 4 (PVP) NPs.…”

Section: Resultsmentioning

confidence: 99%

Template-Regulated Bimetallic Sulfide Nanozymes with High Specificity and Activity for Visual Colorimetric Detection of Cellular H₂O₂

Lian

Liu

Zhang

et al. 2021

ACS Appl. Mater. Interfaces

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For the past several decades, most of the research studies on nanozymes have been aimed at improving their catalytic activity and diversity; however, developing nanozymes with strong catalytic activity and great specificity remains a challenge. Herein, a simple and efficient template synthesis method was used to synthesize bimetallic sulfide nanoparticles, NiCo 2 S 4 NPs, and prove that they have excellent peroxidase-like activity with good specificity. By regulating polyvinyl pyrrolidone (PVP) and hexadecyl trimethyl ammonium bromide as the templating agent, we have obtained the NiCo 2 S 4 (PVP) NPs with a high Ni/Co ratio, thus exhibiting superior peroxidase activity. In addition, the NiCo 2 S 4 NPs selectively catalyzed and oxidized colorless 3,3,5,5-tetramethylbenzidine (TMB). On being treated with H 2 O 2 , TMB turns blue while other substrates did not undergo the oxidation reaction under the same conditions, such as 2,2′-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid) diammonium (ABTS) and dopamine. The high specificity of NiCo 2 S 4 NPs is due to the strong electrostatic driving coordination between negatively charged NiCo 2 S 4 NPs and positively charged TMB. Due to the peroxidase activity of the developed NiCo 2 S 4 NPs, a simple, low-cost, and reliable colorimetric method was established. Simultaneously, this method for in situ quantitative monitoring of H 2 O 2 produced by MDA-MB-231 cells was also achieved. This study has provided a theoretical basis for the improvement of the activity and specificity of bimetallic sulfide nanozymes and may offer guidance for the further reasonable design of related materials.

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Section: Resultsmentioning

confidence: 99%

Template-Regulated Bimetallic Sulfide Nanozymes with High Specificity and Activity for Visual Colorimetric Detection of Cellular H₂O₂

Lian

Liu

Zhang

et al. 2021

ACS Appl. Mater. Interfaces

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“…Transition metal chemicals (TMCs) have been widely used in research as catalysts targeting HER/OER due to their abundant resource storage, low cost, and environmental friendliness, especially nickel-based materials. − However, it was found that their low intrinsic conductivity is a huge obstacle to overcome to replace the precious metal HER/OER catalysts, . Nowadays, the main methods for the preparation of Ni-based catalysts are the hydrothermal method, the sol–gel method, the vapor-phase deposition method, the chemical method, and the electrodeposition method. , The hydrothermal method requires more stringent preparation conditions. The sol–gel method is expensive and has a lengthy preparation cycle.…”

Section: Introductionmentioning

confidence: 99%

“…17−23 However, it was found that their low intrinsic conductivity is a huge obstacle to overcome to replace the precious metal HER/OER catalysts, 24 . 25 Nowadays, the main methods for the preparation of Ni-based catalysts are the hydrothermal method, 26 the sol− gel method, 27 the vapor-phase deposition method, 28 the chemical method, 29 and the electrodeposition method. 30,31 The hydrothermal method requires more stringent preparation conditions.…”

Section: Introductionmentioning

confidence: 99%

Magnetic Field-Assisted Electrodeposition of Fe₃O₄ Nanoparticles on Ni as Bifunctional Electrocatalyst for Overall Water Splitting

Zhu,

Wang,

Chen

et al. 2023

ACS Appl. Nano Mater.

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Hydrogen energy is gaining widespread attention as a green energy source. However, the existing catalysts have high overpotential and kinetic reaction energy barriers, which have seriously affected the catalytic efficiency of hydrogen production from overall water splitting, and the existing metal catalysts cannot be used on a large scale because of scarce resources and high costs. Therefore, it is an urgent need to find an excellent stable transition, low-cost, and high-activity metal-based bifunctional catalyst. In this work, a method is proposed to prepare Ni/Fe3O4 catalytic electrodes by modulating the magnetic field to guide the adsorption of magnetic nanoparticles Fe3O4 on the catalytic electrode surface. It was found that in the case of the added 5 g/L Fe3O4 magnetic nanoparticles coupled with a single magnetic field, the catalytic electrode was measured in an alkaline solution, and the overpotentials of hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) reactions reached 143 and 262 mV at the current density of 10 mA cm–2, with Tafel slopes of 39 and 40 mV dec–1, respectively. Compared to existing transition metal catalytic electrodes, the Ni/Fe3O4 catalytic electrode presents an outstanding catalytic performance in both HER and OER. Moreover, this work demonstrates that superior bifunctional catalytic electrodes with micro/nanostructures can be prepared by regulating different magnetic fields to guide the deposition of magnetic nanoparticles Fe3O4, which provides theoretical evidence for the preparation of future bifunctional catalytic electrodes.

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“…[ 9–11 ] As an important aldehyde, n ‐valeraldehyde is a significant intermediate in organic synthesis and raw materials of spices, which is widely applied in organic synthesis fields. [ 12–17 ] However, the excessive use of n ‐valeraldehyde puts the environment and humans in danger. [ 10,18,19 ] Therefore, the development of a green and eco‐friendly approach to reduce n ‐valeraldehyde pollution is of great significance.…”

Section: Introductionmentioning

confidence: 99%

Highly Efficient Electrocatalytic Upgrade of n‐Valeraldehyde to Octane over Au SACs–NiMn₂O₄ Spinel Synergetic Composites

Qin

Fan

et al. 2022

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In this work, electrocatalytic upgrade of n‐valeraldehyde to octane with higher activity and selectivity is achieved over Au single‐atom catalysts (SACs)–NiMn2O4 spinel synergetic composites. Experiments combined with density functional theory calculation collaboratively demonstrate that Au single‐atoms occupy surface Ni2+ vacancies of NiMn2O4, which play a dominant role in n‐valeraldehyde selective oxidation. A detailed investigation reveals that the initial n‐valeraldehyde molecule preferentially adsorbs on the Mn tetrahedral site of NiMn2O4 spinel synergetic structures, and the subsequent n‐valeraldehyde molecule easily adsorbs on the Ni site. Specifically, Au single‐atom surficial derivation over spinel lowers the adsorption energy (Eads) of the initial n‐valeraldehyde molecule, which will facilitate its adsorption on the Mn site of Au SACs–NiMn2O4. Furthermore, the single‐atom Au surficial derivation not only alters the electronic structure of Au SACs–NiMn2O4 but also lower the Eads of subsequent n‐valeraldehyde molecule. Hence, the subsequent n‐valeraldehyde molecules prefer adsorption on Au sites rather than Ni sites, and the process of two alkyl radicals originating from Mn–C4H9 and Au–C4H9 dimerization into an octane is accordingly accelerated. This work will provide an avenue for the rational design of SACs and supply a vital mechanism for understanding the electrocatalytic upgrade of n‐valeraldehyde to octane.

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Effect of Ni/Co mass ratio and NiO–Co₃O₄ loading on catalytic performance of NiO–Co₃O₄/Nb₂O₅–TiO₂ for direct synthesis of 2-propylheptanol from n-valeraldehyde

Abstract: NiO–Co3O4/Nb2O5–TiO2 catalyst with a Ni/Co mass ratio of 8/3 and NiO–Co3O4 loading of 14% shows the best catalytic performance.

Cited by 11 publications

References 20 publications

Template-Regulated Bimetallic Sulfide Nanozymes with High Specificity and Activity for Visual Colorimetric Detection of Cellular H₂O₂

Template-Regulated Bimetallic Sulfide Nanozymes with High Specificity and Activity for Visual Colorimetric Detection of Cellular H₂O₂

Magnetic Field-Assisted Electrodeposition of Fe₃O₄ Nanoparticles on Ni as Bifunctional Electrocatalyst for Overall Water Splitting

Highly Efficient Electrocatalytic Upgrade of n‐Valeraldehyde to Octane over Au SACs–NiMn₂O₄ Spinel Synergetic Composites

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Effect of Ni/Co mass ratio and NiO–Co3O4 loading on catalytic performance of NiO–Co3O4/Nb2O5–TiO2 for direct synthesis of 2-propylheptanol from n-valeraldehyde

Abstract: NiO–Co3O4/Nb2O5–TiO2 catalyst with a Ni/Co mass ratio of 8/3 and NiO–Co3O4 loading of 14% shows the best catalytic performance.

Cited by 11 publications

References 20 publications

Template-Regulated Bimetallic Sulfide Nanozymes with High Specificity and Activity for Visual Colorimetric Detection of Cellular H2O2

Template-Regulated Bimetallic Sulfide Nanozymes with High Specificity and Activity for Visual Colorimetric Detection of Cellular H2O2

Magnetic Field-Assisted Electrodeposition of Fe3O4 Nanoparticles on Ni as Bifunctional Electrocatalyst for Overall Water Splitting

Highly Efficient Electrocatalytic Upgrade of n‐Valeraldehyde to Octane over Au SACs–NiMn2O4 Spinel Synergetic Composites

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Effect of Ni/Co mass ratio and NiO–Co₃O₄ loading on catalytic performance of NiO–Co₃O₄/Nb₂O₅–TiO₂ for direct synthesis of 2-propylheptanol from n-valeraldehyde

Template-Regulated Bimetallic Sulfide Nanozymes with High Specificity and Activity for Visual Colorimetric Detection of Cellular H₂O₂

Template-Regulated Bimetallic Sulfide Nanozymes with High Specificity and Activity for Visual Colorimetric Detection of Cellular H₂O₂

Magnetic Field-Assisted Electrodeposition of Fe₃O₄ Nanoparticles on Ni as Bifunctional Electrocatalyst for Overall Water Splitting

Highly Efficient Electrocatalytic Upgrade of n‐Valeraldehyde to Octane over Au SACs–NiMn₂O₄ Spinel Synergetic Composites