Hexagonal nanoplates of high-quality γ-gallium oxide: controlled synthesis and good heterogeneous catalytic performance for thiophenes

2018 ◽  
Vol 6 (7) ◽  
pp. 2914-2921 ◽  
Author(s):  
Zun Yang ◽  
Le Xin Song ◽  
Ya Qian Wang ◽  
Mao Mao Ruan ◽  
Yue Teng ◽  
...  
Keyword(s):  
Gallium Oxide ◽  
Interaction Model ◽  
Catalytic Performance ◽  
Cooperative Interaction ◽  
Controlled Synthesis ◽  
High Quality ◽  
Heterogeneous Catalytic ◽  
Hexagonal Nanoplates

Hexagonal nanoplates of high-quality γ-gallium oxide were successfully synthesized by using a competitive and cooperative interaction model.

scholarly journals Electron donation of non-oxide supports boosts O2 activation on nano-platinum catalysts

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Tao Gan ◽  
Jingxiu Yang ◽  
David Morris ◽  
Xuefeng Chu ◽  
Peng Zhang ◽  
...  
Keyword(s):  
Catalytic Oxidation ◽  
Pt Nanoparticles ◽  
Catalytic Performance ◽  
Nitrogen Vacancy ◽  
Innovative Strategy ◽  
Oxide Supports ◽  
Heterogeneous Catalytic ◽  
Highly Active ◽  
Electron Sink ◽  
Nitrogen Vacancies

AbstractActivation of O2 is a critical step in heterogeneous catalytic oxidation. Here, the concept of increased electron donors induced by nitrogen vacancy is adopted to propose an efficient strategy to develop highly active and stable catalysts for molecular O2 activation. Carbon nitride with nitrogen vacancies is prepared to serve as a support as well as electron sink to construct a synergistic catalyst with Pt nanoparticles. Extensive characterizations combined with the first-principles calculations reveal that nitrogen vacancies with excess electrons could effectively stabilize metallic Pt nanoparticles by strong p-d coupling. The Pt atoms and the dangling carbon atoms surround the vacancy can synergistically donate electrons to the antibonding orbital of the adsorbed O2. This synergistic catalyst shows great enhancement of catalytic performance and durability in toluene oxidation. The introduction of electron-rich non-oxide substrate is an innovative strategy to develop active Pt-based oxidation catalysts, which could be conceivably extended to a variety of metal-based catalysts for catalytic oxidation.

Chemical conversion based on crystal facet effect of transition metal oxide and construction methods for sharp-faced nanocrystals

2022 ◽  
Author(s):  
huixiang wang ◽  
Xiaobo Ren ◽  
Zhong Liu ◽  
Baoliang Lv
Keyword(s):  
Transition Metal ◽  
Metal Oxide ◽  
Gas Sensing ◽  
Transition Metal Oxide ◽  
Chemical Conversion ◽  
Catalytic Performance ◽  
Crystal Facet ◽  
Heterogeneous Catalytic ◽  
Construction Methods

The in-depth researches have found that the nanocrystal facet of transition metal oxide (TMO) greatly affects its heterogeneous catalytic performance, as well as the property of photocatalysis, gas sensing, electrochemical...

Shape- and size-controlled synthesis of Cu nanoparticles wrapped on RGO nanosheet catalyst and their outstanding stability and catalytic performance in the hydrogenation reaction of dimethyl oxalate

2018 ◽  
Vol 6 (39) ◽  
pp. 19133-19142 ◽  
Author(s):  
Mohamed Abbas ◽  
Zheng Chen ◽  
Jiangang Chen
Keyword(s):  
Catalytic Performance ◽  
Hydrogenation Reaction ◽  
Controlled Synthesis ◽  
Cu Nanoparticles ◽  
Dimethyl Oxalate ◽  
Size Controlled ◽  
Shape And Size

A novel sonochemical approach was developed for the synthesis of morphology-controlled Cu NPs wrapped on RGO NSs catalysts and their superior stability and catalytic performance in dimethyl oxalate hydrogenation reaction.

scholarly journals Chemocatalytic Production of Lactates from Biomass-Derived Sugars

2018 ◽  
Vol 2018 ◽  
pp. 1-18 ◽  
Author(s):  
Heng Zhang ◽  
Yulin Hu ◽  
Liying Qi ◽  
Jian He ◽  
Hu Li ◽  
...  
Keyword(s):  
Lactic Acid ◽  
Heterogeneous Catalysts ◽  
Catalytic Performance ◽  
Green Solvents ◽  
Separation And Purification ◽  
Sustainable Resources ◽  
Base Catalysts ◽  
Heterogeneous Catalytic ◽  
Acid And Base ◽  
Relative Separation

In recent decades, a great deal of attention has been paid to the exploration of alternative and sustainable resources to produce biofuels and valuable chemicals, with aims of reducing the reliance on depleting confined fossil resources and alleviating serious economic and environmental issues. In line with this, lignocellulosic biomass-derived lactic acid (LA, 2-hydroxypropanoic acid), to be identified as an important biomass-derived commodity chemical, has found wide applications in food, pharmaceuticals, and cosmetics. In spite of the current fermentation of saccharides to produce lactic acid, sustainability issues such as environmental impact and high cost derived from the relative separation and purification process will be growing with the increasing demands of necessary orders. Alternatively, chemocatalytic approaches to manufacture LA from biomass (i.e., inedible cellulose) have attracted extensive attention, which may give rise to higher productivity and lower costs related to product work-up. This work presents a review of the state-of-the-art for the production of LA using homogeneous, heterogeneous acid, and base catalysts, from sugars and real biomass like rice straw, respectively. Furthermore, the corresponding bio-based esters lactate which could serve as green solvents, produced from biomass with chemocatalysis, is also discussed. Advantages of heterogeneous catalytic reaction systems are emphasized. Guidance is suggested to improve the catalytic performance of heterogeneous catalysts for the production of LA.

The bioelectrochemical synthesis of high-quality carbon dots with strengthened electricity output and excellent catalytic performance

Nanoscale ◽  
2019 ◽  
Vol 11 (10) ◽  
pp. 4428-4437 ◽  
Author(s):  
Libin Zeng ◽  
Xinyong Li ◽  
Shiying Fan ◽  
Jianan Li ◽  
Jincheng Mu ◽  
...  
Keyword(s):  
Renewable Energy ◽  
Fuel Cell ◽  
Microbial Fuel Cell ◽  
Organic Pollutants ◽  
Carbon Dots ◽  
Environmentally Friendly ◽  
Catalytic Performance ◽  
High Quality ◽  
Excellent Catalytic Performance

The emergence of microbial fuel cell (MFC) technology that can effectively recycle renewable energy from organic pollutants has been regarded as a promising and environmentally friendly route that could be widely used in numerous fields.

Controlled synthesis of uniform magnetite nanocrystals with high-quality properties for biomedical applications

2012 ◽  
Vol 22 (39) ◽  
pp. 21065 ◽  
Author(s):  
Gorka Salas ◽  
Cintia Casado ◽  
Francisco J. Teran ◽  
Rodolfo Miranda ◽  
Carlos J. Serna ◽  
...  
Keyword(s):  
Biomedical Applications ◽  
Controlled Synthesis ◽  
High Quality ◽  
Quality Properties ◽  
Magnetite Nanocrystals
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