Enhanced reductive debromination of decabromodiphenyl ether by organic-attapulgite supported Fe/Pd nanoparticles: Synergetic effect and mechanism

2022 ◽  
Author(s):  
Zongtang Liu ◽  
Haini Yang ◽  
Mian Wang ◽  
Yufeng Sun ◽  
Zhenghao Fei ◽  
...  
Keyword(s):  
Synergetic Effect ◽  
Pd Nanoparticles ◽  
Decabromodiphenyl Ether

Unusual synergetic effect of nickel single atoms on the electrocatalytic activity of palladium for alcohol oxidation reactions in alkaline media

2018 ◽  
Vol 54 (87) ◽  
pp. 12404-12407 ◽  
Author(s):  
Thantakorn Nitaya ◽  
Yi Cheng ◽  
Shanfu Lu ◽  
Kunakorn Poochinda ◽  
Kejvalee Pruksathorn ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Electrocatalytic Activity ◽  
Synergetic Effect ◽  
Alcohol Oxidation ◽  
Pd Nanoparticles ◽  
Alkaline Media ◽  
Oxidation Reactions ◽  
Single Atoms ◽  
Oxidation Of Alcohols

Ni single atoms encapsulated in carbon nanotubes substantially enhance the activity of Pd nanoparticles for oxidation of alcohols in alkaline media.

scholarly journals Synthesis, Characterization and Electrocatalytic study of Pd supported on CeO2 doped on N, S-rGO towards Hydrogen and Oxygen Evolution

2021 ◽  
Author(s):  
Mengistu Woldetinsay ◽  
Tesfaye Soreta ◽  
Krishnamurthy Palani ◽  
Thandavarayan Maiyalagan ◽  
Femi Emmanuel Olu
Keyword(s):  
Oxygen Evolution ◽  
Electrocatalytic Activity ◽  
Chemical Reduction ◽  
Synergetic Effect ◽  
Linear Sweep Voltammetry ◽  
Pd Nanoparticles ◽  
Linear Sweep ◽  
Oxide Interface ◽  
Production Of Hydrogen ◽  
A Minor

Abstract The sustainable production of hydrogen and oxygen through electrolysis of water requires the development of an efficient electrocatalyst. Herein, we synthesized Pd nanoparticles dispersed on CeO2/N, S-rGO by hydrothermal method followed by chemical reduction of Pd nanoparticles. Electrochemical measurements towards hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) show a high electrocatalytic activity of the catalyst. Among the synthesized electrocatalysts Pd/CeO2/N, S-rGO exhibits lower overpotential (75 mV and 240 mV) at 10 mAcm− 2 and lower Tafel slope value (44 mV dec− 1 and 42 mV dec− 1) for HER and OER, respectively. The chronoamperometric and linear sweep voltammetry (LSV) of the electrocatalyst shows a negligible decrease in the current density for twelve hours and a minor change in the polarization curve after 10,000 cycles, respectively. The high electrocatalytic activity and superior stability of the synthesized electrocatalyst could be attributed to the synergetic effect between Pd nanoparticles and CeO2/N, S-rGO support. This work demonstrates a facile way to develop effective and stable electrocatalysts by exploiting the Pd/Metal oxide interface.

Droplet Factories: Synthesis and Assembly of Silver and Palladium Nanoparticles at the Liquid-Liquid Interface

2019 ◽  
Author(s):  
Suchanuch Sachdev ◽  
Rhushabh Maugi ◽  
Sam Davis ◽  
Scott Doak ◽  
Zhaoxia Zhou ◽  
...  
Keyword(s):  
Iron Oxide ◽  
Reaction Rate ◽  
Tertiary Structure ◽  
Flow Reactor ◽  
Pd Nanoparticles ◽  
Subsequent Removal ◽  
Immiscible Liquids ◽  
Flow Reactors ◽  
Droplet Flow ◽  
One Step

<div>The interface between two immiscible liquids represent an ideal substrate for the assembly of nanomaterials. The defect free surface provides a reproducible support for creating densely packed ordered materials. Here a droplet flow reactor is presented for the synthesis and/ or assembly of nanomaterials at the interface of the emulsion. Each droplet acts as microreactor for a reaction between decamethylferrocene (DmFc) within the hexane and metal salts (Ag+/ Pd2+) in the aqueous phase. The hypothesis was that a spontaneous, interfacial reaction would lead to the assembly of nanomaterials creating a Pickering emulsion. The subsequent removal of the solvents showed how the Ag nanoparticles were trapped at the interface and retain the shape of the droplet, however the Pd nanoparticles were dispersed with no tertiary structure. To further exploit this, a one-step process where the particles are synthesised and then assembled into core-shell materials was proposed. The same reactions were performed in the presence of oleic acid stabilise Iron oxide nanoparticles dispersed within the hexane. It was shown that by changing the reaction rate and ratio between palladium and iron oxide a continuous coating of palladium onto iron oxide microspheres can be created. The same reaction with silver, was unsuccessful and resulted in the silver particles being shed into solution, or incorporated within the iron oxide micro particle. These insights offer a new method and chemistry within flow reactors for the creation of palladium and silver nanoparticles. We use the technique to create metal coated iron oxide nanomaterials but the methodology could be easily transferred to the assembly of other materials.</div><div><br></div>

scholarly journals Pd Nanoparticles Stabilized on the Cross-Linked Melamine-Based SBA-15 as a Catalyst for the Mizoroki–Heck Reaction

2021 ◽  
Author(s):  
Ayat Nuri ◽  
Abolfazl Bezaatpour ◽  
Mandana Amiri ◽  
Nemanja Vucetic ◽  
Jyri-Pekka Mikkola ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Inductively Coupled Plasma ◽  
High Surface ◽  
High Surface Area ◽  
Coupling Reaction ◽  
Pd Nanoparticles ◽  
Significant Activity ◽  
Inductively Coupled ◽  
Transmission Electron ◽  
Ft Ir

AbstractMesoporous SBA-15 silicate with a high surface area was prepared by a hydrothermal method, successively modified by organic melamine ligands and then used for deposition of Pd nanoparticles onto it. The synthesized materials were characterized with infrared spectroscopy (FT-IR), thermogravimetric analysis (TGA), nitrogen physisorption, scanning electron microscopy (SEM) coupled with energy dispersive X-ray analysis (EDX), transmission electron microscopy (TEM), nuclear magnetic resonance (NMR) and inductively coupled plasma (ICP-OES). The catalyst was effectively used in the Mizoroki–Heck coupling reaction of various reactants in the presence of an organic base giving the desired products in a short reaction time and with small catalysts loadings. The reaction parameters such as the base type, amounts of catalyst, solvents, and the temperature were optimized. The catalyst was easily recovered and reused at least seven times without significant activity losses. Graphic Abstract

scholarly journals ZnO coral-like nanoplates decorated with Pd nanoparticles for enhanced VOC gas sensing

2021 ◽  
Author(s):  
Chu Manh Hung ◽  
Lai Van Duy ◽  
Dang Thi Thanh Le ◽  
Hugo Nguyen ◽  
Nguyen Van Duy ◽  
...  
Keyword(s):  
Gas Sensing ◽  
Pd Nanoparticles

scholarly journals Soil fertilization synergistically enhances the impact of pollination services in increasing seed yield of sunflower under dryland conditions

2021 ◽  
pp. 1-14
Author(s):  
Dolapo Bola Adelabu ◽  
Emile Bredenhand ◽  
Sean van der Merwe ◽  
Angelinus Cornelius Franke
Keyword(s):  
Soil Fertility ◽  
Seed Yield ◽  
Synergetic Effect ◽  
Insect Pollination ◽  
Pollination Services ◽  
Degraded Soil ◽  
Soil Fertilization ◽  
Fertilized Soil ◽  
The Impact ◽  
Poor Soil

Abstract To exploit the potential of ecological intensification during sunflower cropping, it is crucial to understand the potential synergies between crop management and ecosystem services. We therefore examined the effect of pollination intensification on sunflower yield and productivity under various levels of soil fertilization over two seasons in the eastern Free State, South Africa. We manipulated soil fertility with fertilizer applications and pollination with exclusion bags. We found a synergetic effect between pollination and soil fertilization whereby increasing pollination intensity led to a far higher impact on sunflower yield when the soil had been fertilized. Specifically, the intensification of insect pollination increased seed yield by approximately 0.4 ton/ha on nutrient poor soil and by approximately 1.7 ton/ha on moderately fertilized soil. Our findings suggest that sunflower crops on adequate balanced soil fertility will receive abundant insect pollination and may gain more from both synergies than crops grown in areas with degraded soil fertility.

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