The catalytic performance of Cu46Zr47-xAl7Yx amorphous ribbons in the degradation of AO II dye wastewater

Abstract A hydrophobic PbO2 electrode modified by surfactant OP-10 was prepared by electrodeposition. The electrode has good hydrophobic surface (the hydrophobic angle can reach 123°), high over point oxygen evolution (OEP) (1.60 V vs. SCE), and good service life (81 h). The electrode morphology and electrodeposition mechanism study found that the addition of OP-10 can help to build a dense PbO2 electrode surface, reduce the occurrence of side reactions, and promote the positive deposition of PbO2. As much as 30 mg L-1 of methylene blue, as the simulated pollutant, could be degraded in 80 min under conditions of 50 mA cm-2, initial pH = 7, and a concentration of supporting electrolyte of 0.15 mol L-1, which could be easily reached. Moreover, a practical dye wastewater was employed, proving the OP-10 modified PbO2 electrode is suitable for industrial applications, where the COD of dye wastewater can be reduced from 330 to 4 mg L-1 in 120 min.

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Preparation of Supported Fe/SiO2 Catalyst and its Catalytic Performance for Wastewater Treatment

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.884-885.117 ◽

2014 ◽

Vol 884-885 ◽

pp. 117-120

Author(s):

Hong Ya Li ◽

Biao Yan ◽

Bin Xia Zhao ◽

Xiao Li Zhang

Keyword(s):

Catalytic Performance ◽

Catalyst Preparation ◽

Impregnation Method ◽

Preparation Process ◽

Iron Nitrate ◽

Dye Wastewater ◽

Peroxide Oxidation ◽

Calcination Time ◽

Catalyst Carrier ◽

Wet Peroxide Oxidation

The catalyst Fe/SiO2 was prepared by impregnation method and used as catalyst for treating the dye wastewater by catalytic wet peroxide oxidation method. The catalyst preparation process was optimized, and under the conditions of: the particle size of catalyst carrier was 0.125-0.200 mm, concentration of iron nitrate was 1.10mol/L, calcination temperature was 600 °C, and calcination time was 4h, the catalyst has higher activity and better stability in treating the wastewater.

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The design and catalytic performance of molybdenum active sites on an MCM-41 framework for the aerobic oxidation of 5-hydroxymethylfurfural to 2,5-diformylfuran

Catalysis Science & Technology ◽

10.1039/c8cy02291g ◽

2019 ◽

Vol 9 (3) ◽

pp. 811-821 ◽

Cited By ~ 7

Author(s):

Zhao-Meng Wang ◽

Li-Juan Liu ◽

Bo Xiang ◽

Yue Wang ◽

Ya-Jing Lyu ◽

...

Keyword(s):

Catalytic Activity ◽

Active Sites ◽

Aerobic Oxidation ◽

Catalytic Performance ◽

Mcm 41

The catalytic activity decreases as –(SiO)3Mo(OH)(O) > –(SiO)2Mo(O)2 > –(O)4–MoO.

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Optimizing electron density of nickel sulfide electrocatalysts through sulfur vacancy engineering for alkaline hydrogen evolution

Journal of Materials Chemistry A ◽

10.1039/d0ta05594h ◽

2020 ◽

Vol 8 (35) ◽

pp. 18207-18214

Author(s):

Dongbo Jia ◽

Lili Han ◽

Ying Li ◽

Wenjun He ◽

Caichi Liu ◽

...

Keyword(s):

Hydrogen Evolution ◽

Electron Density ◽

Rational Design ◽

Nickel Sulfide ◽

Catalytic Performance ◽

Sulfide Catalysts ◽

Sulfur Vacancy

A novel, rational design for porous S-vacancy nickel sulfide catalysts with remarkable catalytic performance for alkaline HER.

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THE EFFECT OF LOCAL LASER ANNEALING ON THE MAGNETIC PROPERTIES OF AMORPHOUS RIBBONS

Le Journal de Physique Colloques ◽

10.1051/jphyscol:19888605 ◽

1988 ◽

Vol 49 (C8) ◽

pp. C8-1325-C8-1326

Author(s):

P. Sánchez ◽

M. C. Sánchez ◽

E. López ◽

M. García ◽

C. Aroca

Keyword(s):

Magnetic Properties ◽

Laser Annealing ◽

Amorphous Ribbons

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EFFECTS OF COMBINED MECHANICAL AND THERMAL TREATMENTS ON TRANSITION METAL-METALLOID AMORPHOUS RIBBONS

Le Journal de Physique Colloques ◽

10.1051/jphyscol:1987859 ◽

1987 ◽

Vol 48 (C8) ◽

pp. C8-395-C8-400 ◽

Cited By ~ 1

Author(s):

P. ALLIA ◽

E. BONETTI ◽

VINAI

Keyword(s):

Transition Metal ◽

Thermal Treatments ◽

Amorphous Ribbons

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Catalytic Resonance Theory: Parallel Reaction Pathway Control

10.26434/chemrxiv.10271090 ◽

2019 ◽

Author(s):

M. Alexander Ardagh ◽

Manish Shetty ◽

Anatoliy Kuznetsov ◽

Qi Zhang ◽

Phillip Christopher ◽

...

Keyword(s):

Chemical Reactions ◽

Active Site ◽

Active Sites ◽

Reaction Pathway ◽

Control Strategies ◽

Oscillation Amplitude ◽

Catalytic Performance ◽

Parallel Reaction ◽

Resonance Theory ◽

Static Conditions

Catalytic enhancement of chemical reactions via heterogeneous materials occurs through stabilization of transition states at designed active sites, but dramatically greater rate acceleration on that same active site is achieved when the surface intermediates oscillate in binding energy. The applied oscillation amplitude and frequency can accelerate reactions orders of magnitude above the catalytic rates of static systems, provided the active site dynamics are tuned to the natural frequencies of the surface chemistry. In this work, differences in the characteristics of parallel reactions are exploited via selective application of active site dynamics (0 < ΔU < 1.0 eV amplitude, 10<sup>-6</sup> < f < 10<sup>4</sup> Hz frequency) to control the extent of competing reactions occurring on the shared catalytic surface. Simulation of multiple parallel reaction systems with broad range of variation in chemical parameters revealed that parallel chemistries are highly tunable in selectivity between either pure product, even when specific products are not selectively produced under static conditions. Two mechanisms leading to dynamic selectivity control were identified: (i) surface thermodynamic control of one product species under strong binding conditions, or (ii) catalytic resonance of the kinetics of one reaction over the other. These dynamic parallel pathway control strategies applied to a host of chemical conditions indicate significant potential for improving the catalytic performance of many important industrial chemical reactions beyond their existing static performance.

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