scholarly journals Bifunctional catalytic activity of Zn1−xFexO toward the OER/ORR: seeking an optimal stoichiometry

2020 ◽  
Vol 22 (38) ◽  
pp. 22078-22095
Author(s):  
Vladimir Rajić ◽  
Ivana Stojković Simatović ◽  
Ljiljana Veselinović ◽  
Jelena Belošević Čavor ◽  
Mirjana Novaković ◽  
...  
Keyword(s):  
Zinc Oxide ◽  
Catalytic Activity ◽  
Alkaline Solution ◽  
Microwave Processing

Eco-friendly and rapid microwave processing of a precipitate was used to produce Fe-doped zinc oxide (Zn1−xFexO, x = 0, 0.05, 0.1, 0.15 and 0.20) nanoparticles, which were tested as catalysts toward the ORR and OER in a moderately alkaline solution.

Regulating Water-Reduction Kinetics in Cobalt Phosphide for Enhancing HER Catalytic Activity in Alkaline Solution

2017 ◽  
Vol 29 (28) ◽  
pp. 1606980 ◽  
Author(s):  
Kun Xu ◽  
Hui Ding ◽  
Mengxing Zhang ◽  
Min Chen ◽  
Zikai Hao ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Alkaline Solution ◽  
Reduction Kinetics ◽  
Water Reduction ◽  
Cobalt Phosphide

Monocrystalline platinum–nickel branched nanocages with enhanced catalytic performance towards the hydrogen evolution reaction

Nanoscale ◽  
2018 ◽  
Vol 10 (11) ◽  
pp. 5072-5077 ◽  
Author(s):  
Zhenming Cao ◽  
Huiqi Li ◽  
Chenyang Zhan ◽  
Jiawei Zhang ◽  
Wei Wang ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Hydrogen Evolution ◽  
Hydrogen Evolution Reaction ◽  
Alkaline Solution ◽  
Catalytic Performance ◽  
Enhanced Stability

Monocrystalline Pt–Ni nanocages were successfully fabricated and exhibited great catalytic activity and enhanced stability for HER in alkaline solution.

Evaluation of the catalytic activity of graphene oxide and zinc oxide nanoparticles on the electrochemical sensing of T1R2-Rebaudioside A complex supported by in silico methods

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Krishna Bisetty ◽  
Suvardhan Kanchi ◽  
Phathisanani Hloma
Keyword(s):  
Zinc Oxide ◽  
Graphene Oxide ◽  
Catalytic Activity ◽  
Zinc Oxide Nanoparticles ◽  
Taste Receptor ◽  
Computational Modelling ◽  
Electrochemical Sensing ◽  
Oxide Nanoparticles ◽  
Rebaudioside A ◽  
Pt Electrode

Abstract Herein, we report on the performance of graphene oxide (GOx) and zinc oxide nanoparticles (ZnONPs) on a platinum (Pt) electrode, immobilized with the human T1R2 sweet taste receptor subunit for the detection of rebaudioside A (Reb-A). The characterization studies performed in this work confirmed the thin-layered structure of GOx and the polydispersed nature of ZnONPs. The elucidation of the mass loss observed by TGA demonstrates the stability of GOx. The cyclic voltammetry results for Pt/GOx revealed good catalytic activity over Pt/ZnONPs for adsorption of the T1R2-Reb-A complex. In addition, a series of computational modelling studies were carried out to better understand the surface adsorption phenomena of GOx and ZnONPs to mimic the layer-by-layer electrode modification strategies independently. The strongest interaction energy observed (−573 kcal mol−1) for the direct interaction of ZnONPs onto the Pt electrode surface, demonstrates a stronger adsorption in contrast to the GOx modified Pt electrode (−23 kcal mol−1). However, the overall results for the layered-nanocomposite revealed that the GOx (−256 kcal mol−1) were more strongly adsorbed in contrast to ZnONPs (−231 kcal mol−1) for the detection of the T1R2-ReB-A complex, demonstrating the reliability of our GOx electrode functionalization strategy. The results of this study can potentially be used to improve the design of rapid Reb-A sensors for the food and beverage industry.

scholarly journals Interaction of Zinc Oxide Nanoparticles with Water: Implications for Catalytic Activity

2019 ◽  
Vol 2 (7) ◽  
pp. 4257-4266 ◽  
Author(s):  
Takat B. Rawal ◽  
Ali Ozcan ◽  
Shih-Hsien Liu ◽  
Sai Venkatesh Pingali ◽  
Oguz Akbilgic ◽  
...  
Keyword(s):  
Zinc Oxide ◽  
Catalytic Activity ◽  
Zinc Oxide Nanoparticles ◽  
Oxide Nanoparticles

Porous Monolithic Electrode of Ni3FeN on 3D Graphene for Efficient Oxygen Evolution

2020 ◽  
Vol 20 (8) ◽  
pp. 5175-5181 ◽  
Author(s):  
Ruiqing Li ◽  
Chenyang Xu ◽  
Xiangfen Jiang ◽  
Yoshio Bando ◽  
Xuebin Wang
Keyword(s):  
Electrical Conductivity ◽  
Catalytic Activity ◽  
Oxygen Evolution ◽  
Alkaline Solution ◽  
High Performance ◽  
High Electrical Conductivity ◽  
3D Graphene ◽  
Transition Metal Nitride ◽  
Iron Incorporation ◽  
3D Network

Developing high-performance nonprecious electrocatalysts for oxygen evolution reaction (OER) is of great importance, but it remains a challenge. In this paper, we synthesize a porous monolithic catalytic electrode, which is transition metal nitride, Ni3FeN, constructed on a 3D network-like support of the strutted graphene foam (Ni3FeN/SG). The obtained Ni3FeN/SG electrode shows the excellent catalytic activity and the durability for OER in alkaline solution, owing to iron incorporation, high electrical conductivity and 3D network-like structure of strutted graphene. It requires small overpotential (226 mV) to actuate 10 mA cm−2, superior to most recently developed catalysts and commercial RuO2. The fabrication strategy provides a substantial way to expand 3D porous monolithic electrodes for various electrocatalytic applications.

Catalytic Activity of Rh Nanoparticles with High-index Faces for Hydrogen Evolution Reaction in Alkaline Solution

2020 ◽  
Vol 49 (2) ◽  
pp. 207-209
Author(s):  
Takuo Wakisaka ◽  
Kohei Kusada ◽  
Dongshuang Wu ◽  
Tomokazu Yamamoto ◽  
Takaaki Toriyama ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Hydrogen Evolution ◽  
Hydrogen Evolution Reaction ◽  
Alkaline Solution ◽  
High Index

scholarly journals Electrodeposition and characterization of Ni-MoO2 composite coatings as cathodes for the hydrogen evolution reaction in alkaline solution

2013 ◽  
Vol 78 (4) ◽  
pp. 549-554 ◽  
Author(s):  
Uros Lacnjevac
Keyword(s):  
Catalytic Activity ◽  
Hydrogen Evolution ◽  
Hydrogen Evolution Reaction ◽  
Alkaline Solution ◽  
Electrochemical Impedance ◽  
Composite Coatings ◽  
Theoretical Interpretation ◽  
X Ray ◽  
Polarization Measurements ◽  
Naoh Solution

Composite Ni-MoO2 coatings were prepared and characterized with respect to their possible application as electrocatalysts for the hydrogen evolution reaction (HER) in alkaline solution. The composites were electrodeposited onto Ni meshes from an ammonium chloride Ni solution with suspended MoO2 particles in simulated industrial conditions for production of commercial cathodes. The influence of the concentration of MoO2 particles in the solution and deposition current density on the morphology, chemical and phase composition of obtained coatings was investigated by scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDS) and X-ray diffraction (XRD). Catalytic activity for the HER of the coatings was examined by polarization measurements in a 32 wt. % NaOH solution at 90?C and compared to the activity of the commercial De Nora?s cathode (DN). It was shown that the most active Ni-MoO2 coating exhibits better polarization characteristics for the HER than the DN cathode. The mechanism of the HER on the specified Ni-MoO2 coating was investigated in 8 mol dm-3 NaOH at 30?C by means of steady-state polarization measurements and an electrochemical impedance spectroscopy (EIS) method. Based on the theoretical interpretation of the experimental data, rate constants of the three individual steps of the HER were determined and the source of catalytic activity of the coating was elucidated.

Excellent Fenton-like catalyst application in alkaline solution

2019 ◽  
Vol 13 (02) ◽  
pp. 2050002 ◽  
Author(s):  
Fan Xia ◽  
Zhaodong Nan
Keyword(s):  
Catalytic Activity ◽  
Alkaline Solution ◽  
Catalytic Mechanism ◽  
Experimental Result ◽  
Environmental Restoration ◽  
Fenton Process ◽  
Fenton Catalyst ◽  
Effects Of Ph ◽  
Catalyst Dosage

Fenton process has been widely applied for environmental restoration. However, acidic and neutral solutions are always needed in order to obtain an excellent catalytic activity. Flower-like MoS2 was firstly used as a Fenton catalyst with higher activity in alkaline solution than that in acidic and neutral ones. The catalytic mechanism indicated that [Formula: see text] and [Formula: see text] radicals formation induced the excellent catalytic activity in alkaline solution. Effects of pH, catalyst dosage, H2O2 and RhB concentrations on catalytic activity were studied, and the quantitative relations were established. The experimental result demonstrated that the catalyst was stable in alkaline solution. The leaching Mo was smaller than 2[Formula: see text]mg/L.

scholarly journals Photoanodic oxidation of D-glucose on a polycrystalline zinc oxide electrode in an alkaline solution.

1986 ◽  
pp. 1-7 ◽  
Author(s):  
Tamihiko KATO ◽  
Akira FUJISHIMA ◽  
Eturô MAEKAWA ◽  
Kenichi HONDA
Keyword(s):  
Zinc Oxide ◽  
Alkaline Solution ◽  
Oxide Electrode ◽  
Polycrystalline Zinc
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