scholarly journals Highly Porous Au–Pt Bimetallic Urchin-Like Nanocrystals for Efficient Electrochemical Methanol Oxidation

Nanomaterials ◽  
2021 ◽  
Vol 11 (1) ◽  
pp. 112
Author(s):  
Heon Chul Kim ◽  
Jong Wook Hong
Keyword(s):  
Methanol Oxidation ◽  
Active Sites ◽  
Synthesis Method ◽  
High Porosity ◽  
One Pot ◽  
Wet Chemical Synthesis ◽  
Bimetallic Nanocrystals ◽  
Wet Chemical ◽  
Surface Active ◽  
Highly Porous

Highly porous Au–Pt urchin-like bimetallic nanocrystals have been prepared by a one-pot wet-chemical synthesis method. The porosity of urchin-like bimetallic nanocrystals was controlled by amounts of hydrazine used as reductant. The prepared highly porous Au-Pt urchin-like nanocrystals were superior catalysts of electrochemical methanol oxidation due to high porosity and surface active sites by their unique morphology. This approach will pave the way for the design of bimetallic porous materials with unprecedented functions.

scholarly journals Canted antiferromagnetism in high-purity NaFeF3 prepared by a novel wet-chemical synthesis method

2020 ◽  
Vol 4 (11) ◽  
Author(s):  
Fabian L. M. Bernal ◽  
Bruno Gonano ◽  
Fredrik Lundvall ◽  
David S. Wragg ◽  
Helmer Fjellvåg ◽  
...  
Keyword(s):  
Chemical Synthesis ◽  
High Purity ◽  
Synthesis Method ◽  
Wet Chemical Synthesis ◽  
Wet Chemical

Quantitative determination of the number of surface active sites and the turnover frequency for methanol oxidation over bulk metal vanadates

2003 ◽  
Vol 78 (1-4) ◽  
pp. 257-268 ◽  
Author(s):  
Laura E Briand ◽  
Jih-Mirn Jehng ◽  
Laura Cornaglia ◽  
Andrew M Hirt ◽  
Israel E Wachs
Keyword(s):  
Quantitative Determination ◽  
Methanol Oxidation ◽  
Active Sites ◽  
Turnover Frequency ◽  
Bulk Metal ◽  
Surface Active

Eco-Friendly Synthesis of Silver Nanoparticles Using Carica Papaya Extract for Anti Bacterial Applications

2012 ◽  
Vol 629 ◽  
pp. 279-283 ◽  
Author(s):  
Rameshwar Rao ◽  
C. Shilpa Chakra ◽  
K. Venkateswara Rao
Keyword(s):  
Carica Papaya ◽  
Research Work ◽  
Synthesis Method ◽  
Cost Effective ◽  
Nano Particles ◽  
Environment Friendly ◽  
Wet Chemical Synthesis ◽  
Agno3 Solution ◽  
Wet Chemical ◽  
Synthesis Of Nanomaterials

Nanobiotechnology emerged as integration of nanotechnology and biotechnology for developing bioactive, biosynthetic and eco -friendly technology for synthesis of nanomaterials. Nanostructures have great demand in areas such as chemistry, catalysis, electronics, energy, and medical applications. Metallic nano-particles are normally synthesized by wet chemical synthesis techniques using the toxic and inflammable chemicals. Present research work on preparation of silver nano-particles by green nano synthesis method and has advantages over conventional methods involving chemical agents which can cause environmental toxicity. The synthesis technique is a cost effective and environment friendly technique for green nano synthesis of silver nano-particles from varying concentrations of AgNO3 solution and extract of Carica papaya fruit of different concentrations which acts as reducing and capping agent. Characterizations has been done using UV–Vis absorption spectroscopy, XRD, particle size analyser and SEM with EDX. Antimicrobial activity was done using Escherichia coli and Pseudomonas.

scholarly journals Facile growth of high transmittance ZnO micro-rod clusters on indium tin oxide by a wet-chemical synthesis method

2021 ◽  
Vol 30 ◽  
pp. 263498332110389
Author(s):  
S Morkoç Karadeniz
Keyword(s):  
Chemical Synthesis ◽  
Tin Oxide ◽  
Indium Tin Oxide ◽  
Hexagonal Phase ◽  
Synthesis Method ◽  
Zinc Nitrate ◽  
Synthesis Process ◽  
Nitrate Hexahydrate ◽  
Wet Chemical Synthesis ◽  
Wet Chemical

A simple wet-chemical synthesis method was developed to fabricate Zinc oxide micro-rod clusters. The synthesis process involved the rapid dilution of a zinc-bearing alkaline solution at 150°C in a convection oven on indium tin oxide (ITO) substrates. The synthesis was carried out by immersing an unseeded ITO substrate in a mixture of zinc nitrate hexahydrate (Zn(NO3)2·6H2O) and hexamethylenetetramine ((CH2)6N4) aqueous solution. The obtained sample was annealed at 400°C for 2 h. The structural, morphological and optical properties of the synthesized ZnO microstructures were investigated by X-ray diffraction, scanning electron microscopy and ultraviolet-visible spectroscopy, respectively. The ZnO rod clusters are hexagonal phase of the wurtzite structure. The crystal grain sizes of the films were found to be 72.6, 84.3 and 66.3 nm for the (100), (002) and (101) crystal planes, respectively. The optical bandgap of the ZnO was determined to be 3.147 eV.

scholarly journals Aging amorphous/crystalline heterophase PdCu nanosheets for catalytic reactions

2019 ◽  
Vol 6 (5) ◽  
pp. 955-961 ◽  
Author(s):  
Hongfei Cheng ◽  
Nailiang Yang ◽  
Xiaozhi Liu ◽  
Qinbai Yun ◽  
Min Hao Goh ◽  
...  
Keyword(s):  
Amorphous Phase ◽  
Crystalline Phase ◽  
Aging Effect ◽  
Proof Of Concept ◽  
One Pot ◽  
Future Studies ◽  
Wet Chemical Synthesis ◽  
Wet Chemical ◽  
The One ◽  
Phase Engineering

ABSTRACT Phase engineering is arising as an attractive strategy to tune the properties and functionalities of nanomaterials. In particular, amorphous/crystalline heterophase nanostructures have exhibited some intriguing properties. Herein, the one-pot wet-chemical synthesis of two types of amorphous/crystalline heterophase PdCu nanosheets is reported, in which one is amorphous phase-dominant and the other one is crystalline phase-dominant. Then the aging process of the synthesized PdCu nanosheets is studied, during which their crystallinity increases, accompanied by changes in some physicochemical properties. As a proof-of-concept application, their aging effect on catalytic hydrogenation of 4-nitrostyrene is investigated. As a result, the amorphous phase-dominant nanosheets initially show excellent chemoselectivity. After aging for 14 days, their catalytic activity is higher than that of crystalline phase-dominant nanosheets. This work demonstrates the intriguing properties of heterophase nanostructures, providing a new platform for future studies on the regulation of functionalities and applications of nanomaterials by phase engineering.

A porous PdO microrod-based electrochemical sensor for nanomolar-level Cu2+ released from cells

2014 ◽  
Vol 2 (44) ◽  
pp. 7719-7724 ◽  
Author(s):  
Xia Cao ◽  
Yu Han ◽  
Caizhen Gao ◽  
Ying Xu ◽  
Xiaomin Huang ◽  
...  
Keyword(s):  
Electrochemical Sensor ◽  
Surface Area ◽  
Active Sites ◽  
Chemical Method ◽  
Large Surface Area ◽  
Wet Chemical Method ◽  
Wet Chemical ◽  
First Time ◽  
Highly Porous

Highly porous PdO microrods (PoPdOMRs) with a well-defined morphology, large surface area and active sites were synthesized via a facile wet chemical method for the first time.

scholarly journals Facile synthesis of polyoxometalates tethered to post Fe-BTC frameworks for esterification of free fatty acids to biodiesel

RSC Advances ◽  
2019 ◽  
Vol 9 (14) ◽  
pp. 8113-8120 ◽  
Author(s):  
Qiuyun Zhang ◽  
Xiaofang Liu ◽  
Tingting Yang ◽  
Caiyan Yue ◽  
Quanlin Pu ◽  
...  
Keyword(s):  
Metal Organic Framework ◽  
Solid Acid Catalyst ◽  
Synthesis Method ◽  
Porous Metal ◽  
Acid Catalyst ◽  
Phosphomolybdic Acid ◽  
Biodiesel Production ◽  
One Pot ◽  
Metal Organic ◽  
Highly Porous

Phosphomolybdic acid was sequentially incorporated into a highly porous metal–organic framework by a one-pot synthesis method, and the prepared composite was used as an efficient and stable solid acid catalyst for biodiesel production.

A dendritic core–shell Cu@PtCu alloy electrocatalyst resulting in an enhanced electron transfer ability and boosted surface active sites for an improved methanol oxidation reaction

2017 ◽  
Vol 53 (54) ◽  
pp. 7457-7460 ◽  
Author(s):  
Jiayin Liu ◽  
Guangran Xu ◽  
Baocang Liu ◽  
Jun Zhang
Keyword(s):  
Methanol Oxidation ◽  
Oxidation Reaction ◽  
Active Sites ◽  
Structural Features ◽  
Methanol Oxidation Reaction ◽  
Core Shell ◽  
One Pot ◽  
Alloy Nanocrystals ◽  
Dendritic Core ◽  
Ptcu Alloy

A facile one-pot strategy is developed to synthesize dendritic core–shell Cu@PtCu alloy nanocrystals with controlled morphologies and structural features, which show superior electrocatalytic performance toward a methanol oxidation reaction.

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