Preparation of NixCo3-xTiO4 Ternary Nanowire and Study on their Electrocatalytic Performances

2017 ◽  
Vol 1142 ◽  
pp. 197-200
Author(s):  
Xiao Bo Zhang ◽  
Hai Ping Liu
Keyword(s):  
Cyclic Voltammetry ◽  
Catalytic Activity ◽  
Steady State ◽  
Anode Materials ◽  
Catalytic Performance ◽  
High Catalytic Activity ◽  
Deposition Method ◽  
Good Crystallinity ◽  
Constant Potential ◽  
Cobalt And Nickel

In this paper, NixCo3-xTiO4 nanowire as anode materials was prepared by co-deposition method, and the characterized results showed that had good crystallinity by SEM. The cobalt and nickel were enriched in the surface in the sample by XPS. The catalytic performance of NixCo3-xTiO4 was studied by cyclic voltammetry and constant potential. The results showed that when the Co: Ni = 4:1, the temperature was 120°C, NixCo3-xTiO4 nanowires had high catalytic activity and good stability by the cyclic voltammetry and the steady state polarization curves.

Facile preparation of a hierarchically porous metal–organic nanocomposite with excellent catalytic performance

RSC Advances ◽  
2016 ◽  
Vol 6 (99) ◽  
pp. 97399-97403 ◽  
Author(s):  
Rui Kuang ◽  
Luyi Zheng ◽  
Ethan Cottrill ◽  
Ning Pan ◽  
Yanhui Chi ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Aging Process ◽  
Porous Metal ◽  
Catalytic Performance ◽  
High Catalytic Activity ◽  
Hierarchically Porous ◽  
Hierarchical Porous ◽  
Metal Organic ◽  
Facile Preparation ◽  
Excellent Catalytic Performance

A hierarchical porous MOF nanocrystal, hpCuL (L = 2,4,6-tris(3,5-dicarboxylatephenylamino)-1,3,5-triazine) was prepared via a facile gel-aging process. This nanocomposite exhibits high catalytic activity and stability for the reduction of 4-nitrophenol.

MOF-derived Co1.11Te2 with half-metallic character for efficient photochemical conversion of CO2 under visible-light irradiation

2019 ◽  
Vol 55 (48) ◽  
pp. 6862-6865 ◽  
Author(s):  
Yong Xu ◽  
Jiang Mo ◽  
Guanqun Xie ◽  
Dawei Ding ◽  
Shujiang Ding ◽  
...  
Keyword(s):  
Electron Transfer ◽  
Catalytic Activity ◽  
Energy Barrier ◽  
Catalytic Performance ◽  
Carbon Layer ◽  
Low Energy ◽  
High Catalytic Activity ◽  
Key Factors ◽  
Strong Electron ◽  
Half Metallic

Co1.11Te2 enwrapped in a carbon layer displayed high catalytic performance for photocatalytic CO2 reduction. The strong electron transfer ability and the low energy barrier are the key factors that promote its high catalytic activity.

Homogeneous nanosheet Co3O4 film prepared by novel unipolar pulse electro-deposition method for electrochemical water splitting

RSC Advances ◽  
2015 ◽  
Vol 5 (93) ◽  
pp. 76026-76031 ◽  
Author(s):  
Xiumin Li ◽  
Guoqing Guan ◽  
Xiao Du ◽  
Ajay D. Jagadale ◽  
Ji Cao ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Water Splitting ◽  
High Catalytic Activity ◽  
Deposition Method ◽  
Electro Deposition ◽  
Unipolar Pulse ◽  
Electrochemical Water Splitting

Homogeneous nanosheet Co3O4 film prepared by novel unipolar pulse electro-deposition method shows high catalytic activity for electrochemical water splitting.

scholarly journals Biodiesel Production over Niobium-Containing Catalysts: A Review

Energies ◽  
2021 ◽  
Vol 14 (17) ◽  
pp. 5506
Author(s):  
Daniel Carreira Batalha ◽  
Márcio José da Silva
Keyword(s):  
Catalytic Activity ◽  
Active Sites ◽  
Heterogeneous Catalysts ◽  
Raw Materials ◽  
Catalytic Performance ◽  
High Specific Surface Area ◽  
Biodiesel Production ◽  
Molar Ratio ◽  
Main Reaction ◽  
High Catalytic Activity

Nowadays, the synthesis of biofuels from renewable raw materials is very popular. Among the various challenges involved in improving these processes, environmentally benign catalysts compatible with an inexpensive feedstock have become more important. Herein, we report the recent advances achieved in the development of Niobium-containing heterogeneous catalysts as well as their use in routes to produce biodiesel. The efficiency of different Niobium catalysts in esterification and transesterification reactions of lipids and oleaginous raw materials was evaluated, considering the effect of main reaction parameters such as temperature, time, catalyst load, and oil:alcohol molar ratio on the biodiesel yield. The catalytic performance of Niobium compounds was discussed considering the characterization data obtained by different techniques, including NH3-TPD, BET, and Pyr-FT-IR analysis. The high catalytic activity is attributed to its inherent properties, such as the active sites distribution over a high specific surface area, strength of acidity, nature, amount of acidic sites, and inherent mesoporosity. On top of this, recycling experiments have proven that most Niobium catalysts are stable and can be repeatedly used with consistent catalytic activity.

scholarly journals Properties and catalytic performance of sulphate-vanadia impregnated fumed silica as oxidative catalyst

2015 ◽  
Vol 11 (2) ◽  
Author(s):  
Nor Masdiana Zulkeple ◽  
Norhasyimah Mohd Kamal ◽  
Jamilah Mohd Ekhsan ◽  
Salasiah Che Me ◽  
Swee Ean Lim ◽  
...  
Keyword(s):  
Hydrogen Peroxide ◽  
Catalytic Activity ◽  
Charge Transfer ◽  
Surface Area ◽  
Sulphuric Acid ◽  
Fumed Silica ◽  
Catalytic Performance ◽  
Support Surface ◽  
High Catalytic Activity ◽  
Impregnation Method

A series of sulphate-vanadia impregnated fumed silica oxidative catalysts were synthesized via impregnation method. The samples were prepared by impregnation of 1 wt% of vanadium and 0.2 M of sulphuric acid onto fumed silica as support. Surface area of the silica supported samples were similar of 118 m2/g. UV-Vis DRS results showed existence of o supported V species and the charge transfer bands associated with O2- to V5+ in tetrahedral environments. Catalytic performance were evaluated via epoxidation of 1-octene to 1,2-epoxyoctane using hydrogen peroxide as an oxidant. It had been demonstrated that sulphate-vanadia impregnated fumed silica had high catalytic activity of 626 ± 0.2 mmol epoxide was produced after 24 h reaction. This may indicate that more oxidative sites were generated after the impregnation of V and sulphate onto the SiO2 matrixes.

Pd nanoparticles stabilized with phosphine-functionalized porous ionic polymer for efficient catalytic hydrogenation of nitroarenes in water

2020 ◽  
Vol 44 (9) ◽  
pp. 3681-3689 ◽  
Author(s):  
Yizhu Lei ◽  
Zaifei Chen ◽  
Guosong Lan ◽  
Renshu Wang ◽  
Xiao-Yu Zhou
Keyword(s):  
Catalytic Activity ◽  
Catalytic Hydrogenation ◽  
Palladium Nanoparticles ◽  
Pd Nanoparticles ◽  
Catalytic Performance ◽  
High Catalytic Activity ◽  
Ionic Polymer ◽  
Electron Donation ◽  
Nano Size ◽  
Excellent Catalytic Performance

Small palladium nanoparticles stabilized with phosphine-functionalized PIP displayed high catalytic activity for nitroarenes hydrogenation. Nano-size Pd particles, electron-donation effect of phosphine ligand, and surface wettability account for its excellent catalytic performance.

Syntheses and structures of two gold(i) coordination compounds derived from P–S hybrid ligands and their efficient catalytic performance in the photodegradation of nitroaromatics in water

2015 ◽  
Vol 44 (12) ◽  
pp. 5662-5671 ◽  
Author(s):  
Hai-Xiao Qi ◽  
Jian-Feng Wang ◽  
Zhi-Gang Ren ◽  
Jin-Jiao Ning ◽  
Jian-Ping Lang
Keyword(s):  
Catalytic Activity ◽  
Coordination Compounds ◽  
Catalytic Performance ◽  
High Catalytic Activity ◽  
Hybrid Ligands

Two Au–P–S complexes [Au2(dppatc)2]Cl2 and [Au(dppmt)]2 were prepared and they showed high catalytic activity toward the photodegradation of nitroaromatics in water.

Electro-Catalytic Performance of Different Pt/Ag Ratio on H2O2 Electro-Reduction for Direct NaBH4-H2O2 Fuel Cell

2014 ◽  
Vol 986-987 ◽  
pp. 59-62
Author(s):  
Ting Fang Yang ◽  
Dan Zheng ◽  
Zao Xi Yu
Keyword(s):  
Cyclic Voltammetry ◽  
Catalytic Activity ◽  
Reduction Method ◽  
Catalytic Performance ◽  
Performance Tests ◽  
Peak Current Density ◽  
Acid Media ◽  
Electro Catalytic Activity ◽  
Xrd And Tem ◽  
Better Than

In this paper the different proportional Pt/Ag on XC-72 carbon are studied to serve as the electro-catalysts of H2O2in acid media. All catalysts are prepared by impregnation reduction method and characterized by XRD and TEM. The electrochemical performance tests are examined by cyclic voltammetry (CV) at 25°C and 30°C, respectively. The results suggest that the peak current density increases with increasing the Ag content in Pt-Ag/C. Attributed to the temperature factor, the electro-catalytic activity of all catalysts at 30°C is better than that of 25°C.

Catalytic performance of a Keplerate-type, giant-ball nanoporous isopolyoxomolybdate as a highly efficient recyclable catalyst for the synthesis of biscoumarins

2016 ◽  
Vol 71 (3) ◽  
pp. 219-225 ◽  
Author(s):  
Abolghasem Davoodnia ◽  
Ahmad Nakhaei ◽  
Niloofar Tavakoli-Hoseini
Keyword(s):  
Catalytic Activity ◽  
Catalytic Performance ◽  
High Catalytic Activity ◽  
Synthetic Approach ◽  
Organic Transformations ◽  
Aliphatic Aldehydes ◽  
Short Reaction Time ◽  
Type Giant ◽  
High Yields ◽  
Work Up

AbstractIn continuation of our previous works on the application of (NH4)42[MoVI72MoV60O372(CH3COO)30(H2O)72], a Keplerate-type giant-ball nanoporous isopolyoxomolybdate, as a catalyst for a series of organic transformations, in this paper, we discovered that this new attractive catalyst has high catalytic activity in the synthesis of biscoumarins prepared by the reaction of 4-hydroxycoumarin and aromatic or aliphatic aldehydes in refluxing ethanol. The catalyst was prepared according to a previously published literature procedure using inexpensive and readily available starting materials. Furthermore, the catalyst could be recovered conveniently and reused efficiently such that a considerable catalytic activity still could be achieved after fifth run. Other beneficial features of this new synthetic approach include short reaction time, high yields, clean reaction profiles, and a simple work-up procedure.

Fabrication of hollow Cu2O@CuO-supported Au–Pd alloy nanoparticles with high catalytic activity through the galvanic replacement reaction

2015 ◽  
Vol 3 (8) ◽  
pp. 4578-4585 ◽  
Author(s):  
Wang Yao ◽  
Fei-Long Li ◽  
Hong-Xi Li ◽  
Jian-Ping Lang
Keyword(s):  
Catalytic Activity ◽  
Catalytic Performance ◽  
Galvanic Replacement ◽  
High Catalytic Activity ◽  
Alloy Nanoparticles ◽  
Galvanic Replacement Reaction ◽  
Replacement Reaction ◽  
Pd Alloy ◽  
Excellent Catalytic Performance

Cu2O@CuO-supported Au–Pd alloy nanoparticles prepared through the galvanic replacement approach exhibit an excellent catalytic performance in reducing 4-nitrophenol to 4-aminophenol.

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