Efficient oxygen electroreduction over ordered mesoporous Co–N-doped carbon derived from cobalt porphyrin

RSC Advances ◽  
2016 ◽  
Vol 6 (18) ◽  
pp. 15167-15174 ◽  
Author(s):  
C. Li ◽  
Z. Han ◽  
Y. Yu ◽  
Y. Zhang ◽  
B. Dong ◽  
...  
Keyword(s):  
High Performance ◽  
Oxygen Electroreduction ◽  
Alkaline Media ◽  
Cobalt Porphyrin ◽  
Ordered Mesoporous ◽  
Comparable Activity ◽  
Acidic And Alkaline Media

High-performance self-supported Co–N-doped carbon electrocatalyst for ORR with comparable activity to Pt/C in both acidic and alkaline media was prepared.

Electro- and photoelectro-catalysts derived from bimetallic amorphous metal–organic frameworks

2020 ◽  
Vol 10 (24) ◽  
pp. 8265-8282
Author(s):  
Javier Fonseca ◽  
Sunho Choi
Keyword(s):  
High Performance ◽  
Metal Organic Frameworks ◽  
Synthesis Method ◽  
Amorphous Metal ◽  
Alkaline Media ◽  
Metal Organic ◽  
Acidic And Alkaline Media

It is developed a synthesis method for the design of new bimetallic amorphous MOFs. Such frameworks serve as precursors to prepare high-performance electro- and photoelectro-catalysts for ORR, OER and HER in both acidic and alkaline media.

scholarly journals Degradation and detoxification of 2-chlorophenol aqueous solutions using ionizing gamma radiation

Nukleonika ◽  
2017 ◽  
Vol 62 (1) ◽  
pp. 61-68 ◽  
Author(s):  
Ahmed Ali Basfar ◽  
Majid Muneer ◽  
Omar Ahmed Alsager
Keyword(s):  
Gamma Radiation ◽  
High Performance ◽  
Alkaline Media ◽  
Radiation Doses ◽  
Ph Values ◽  
Alkaline Conditions ◽  
Potential Applicability ◽  
Acidic And Alkaline Media ◽  
First Time ◽  
By Products

Abstract Chlorophenols are compounds with high toxicity, poor biodegradability, and carcinogenic and recalcitrant properties. This work studies, for the first time, the destruction and detoxification of 2-chlorophenol (2-CP) in water using 60Co gamma radiation under different conditions including varied radiation doses, addition of hydrogen peroxide (H2O2), and varied pH values. High-performance liquid chromatography (HPLC) and ion chromatography (IC) confirmed a successful degradation of 2-CP to primarily yield phenol molecules and chloride anions. A radiation dose as low as 25 kGy achieved approximately 90% removal of 50–150 ppm of 2-CP in neutral water. However, the addition of a strong oxidizer such as H2O2 to 2-CP solutions reduced the required dose to achieve 90% removal to at least 1.3-fold. The reduction in radiation doses was also observed in acidic and alkaline media, reducing the required doses of 90% removal to at least 0.4-fold. It was imperative to study the toxicity levels of the oxidation by-products to provide directions for the potential applicability of this technology in water treatment. Toxicology Microtox® bioassay indicated a significant reduction in the toxicity of the degradation by-products and the detoxification was further enhanced by the addition of H2O2 and changing the pH to more acidic or alkaline conditions. These findings will contribute to the knowledge of the removal and detoxification of such challenging environmental contaminant and could be potentially applied to other biologically resistant compounds.

Ordered mesoporous carbon assisted Fe–N–C for efficient oxygen reduction catalysis in both acidic and alkaline media

2020 ◽  
Vol 31 (16) ◽  
pp. 165708 ◽  
Author(s):  
Shuqin Liang ◽  
Haichuan Guo ◽  
Hangjia Shen ◽  
Hanzhang Gong ◽  
Fenghui Fan ◽  
...  
Keyword(s):  
Oxygen Reduction ◽  
Mesoporous Carbon ◽  
Ordered Mesoporous Carbon ◽  
Alkaline Media ◽  
Ordered Mesoporous ◽  
Acidic And Alkaline Media

Novel High Performance Elastomers: New, Recyclable Materials for Oil and Gas From In-Line Inspection to Pipe Coating

2012 ◽  
Author(s):  
Michael Magerstädt ◽  
Holger Schmidt ◽  
Gunther Blitz ◽  
Ralf Dopieralla ◽  
Frank Schellbach
Keyword(s):  
Mechanical Properties ◽  
Material Properties ◽  
High Performance ◽  
Oil And Gas ◽  
Alkaline Media ◽  
Polyurethane Elastomer ◽  
Polyurethane Elastomers ◽  
Acidic And Alkaline Media ◽  
The Right ◽  
Tear Resistance

Starting out from the need for polyurethanes with higher abrasion and tear resistance for pipeline inspection, an entire class of new high performance elastomers were developed. Within a few years materials were synthesized which did not only extend the mechanical properties of polyurethane elastomers, but also led to the development of completely new products. Applications range from intelligent plastic solutions combining elastomers and electronics via highly abrasion resistant pipe coatings to a new process for recycling and reuse of crosslinked polyurethanes. Fundamental to these successful developments is the “building-block” chemistry of polyurethanes. A very high number of permutations of the up to 7 components used in the synthesis of a polyurethane elastomer is possible. By choosing the right combinations and the right reaction conditions, specific material properties can be designed. Materials exhibiting the following material properties, hitherto not found in polyurethanes, were developed: • An operating temperature range from −50 to +135°C. • Chemical resistance to highly acidic and alkaline media, e.g., pure ammonia. • Significantly higher abrasion and tear resistance than standard polyurethanes. • Exactly adjustable visco-elastic damping (rebound resilience). • Adhesion to steel higher than reported with any other polyurethane elastomer. • A novel polyurethane elastomer with more than 90% share of recycled material reaching mechanical properties in the same range as virgin material. This presentation will detail the materials and their properties and give application examples from pipeline cleaning, pipe protection, and pipe coating to mechanical protection devices made from recycled polyurethane elastomer.

scholarly journals One-Pot Synthesis of W2C/WS2 Hybrid Nanostructures for Improved Hydrogen Evolution Reactions and Supercapacitors

Nanomaterials ◽  
2020 ◽  
Vol 10 (8) ◽  
pp. 1597 ◽  
Author(s):  
Sajjad Hussain ◽  
Iqra Rabani ◽  
Dhanasekaran Vikraman ◽  
Asad Feroze ◽  
Muhammad Ali ◽  
...  
Keyword(s):  
Hydrogen Evolution ◽  
High Performance ◽  
Hybrid Nanostructures ◽  
Alkaline Media ◽  
Supercapacitor Electrode ◽  
One Pot ◽  
Energy Applications ◽  
Symmetric Supercapacitor ◽  
Acidic And Alkaline Media ◽  
First Time

Tungsten sulfide (WS2) and tungsten carbide (W2C) are materialized as the auspicious candidates for various electrochemical applications, owing to their plentiful active edge sites and better conductivity. In this work, the integration of W2C and WS2 was performed by using a simple chemical reaction to form W2C/WS2 hybrid as a proficient electrode for hydrogen evolution and supercapacitors. For the first time, a W2C/WS2 hybrid was engaged as a supercapacitor electrode and explored an incredible specific capacitance of ~1018 F g−1 at 1 A g−1 with the outstanding robustness. Furthermore, the constructed symmetric supercapacitor using W2C/WS2 possessed an energy density of 45.5 Wh kg−1 at 0.5 kW kg−1 power density. For hydrogen evolution, the W2C/WS2 hybrid produced the low overpotentials of 133 and 105 mV at 10 mA cm−2 with the small Tafel slopes of 70 and 84 mV dec−1 in acidic and alkaline media, respectively, proving their outstanding interfaced electrocatalytic characteristics. The engineered W2C/WS2-based electrode offered the high-performance for electrochemical energy applications.

scholarly journals Preparation of Practical High‐Performance Electrodes for Acidic and Alkaline Media Water Electrolysis

ChemSusChem ◽  
2021 ◽  
Author(s):  
Gun-hee Moon ◽  
Yue Wang ◽  
Seongseop Kim ◽  
Eko Budiyanto ◽  
Harun Tüysüz
Keyword(s):  
High Performance ◽  
Water Electrolysis ◽  
Alkaline Media ◽  
Acidic And Alkaline Media
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