Carbon Nanofibers In article 2200408, Matthias Wessling and co-workers demonstrate that carbon nanofibers are grown on a nickel foam as binder-free electrode for electrochemical advanced oxidation processes. The C/Ni combination provides excellent reduction rates of O2 to H2O2, which is realized by multiple reaction pathways, being the two-electron pathway materials one-electron through •O2 rad...

Nickel foam substrates are frequently utilised as porous 3D for renewable energy applications. The preparation of these usually includes an acid-washing step, but the degree to which this step affects final electrochemical performance after spray-coating a catalyst ink is unreported. Herein, we report effects acid washing through physicochemical and characterisation. was determined repeated mea...

Abstract This article considers the main materials used to make aircraft, both fuselage and engines. First, problems that force developers introduce new in aircraft production are identified. We then present features of introduction heat-resistant titanium alloys, ways improving mechanical properties parts made methods manufacturing complex details. Other promising for aviation industry, such a...

this investigation presents the effect of various parameters on foam stability and its rheological properties. the underlying idea of this experiment is generating of drilling foam with uniform bubbles. the main problem of foam using is controlling its stability during field application. the most important parameters which cause instability in foam are gravity drainage, gas diffusion and bubble...

The annular foam breaker is one which uses the vacuum and shear force generated by the Coanda effect to break foam. Its effectiveness in destroying drilling foam has been test in wellbore flow simulation loop experimental stand. Experimental results showed that the operating pressure of the annular foam breaker should be larger than 0.6MPa and the stabilizers concentration of the foam drilling ...

The objective of this manuscript is to study the possibility improving thermal performance an Evacuated Tube Solar Collector (ETSC) with integration a Phase Change Material (PCM) incorporated into metallic foam and fitted plate fins. A 2D mathematical model has been proposed. Two types metal foams (copper nickel) were inserted. In addition, effect pore size on heat transfer was studied. results...

Ordered Mesoporous Carbon (OMC) represents an interesting material for electric double layer capacitors which has the high surface area, easily accessed ordered pore channels and lower production cost. In this work, CMK-3 as promising OMC has been fabricated using the ordered mesoporous silica SBA-15 as a template. The structure and morphology of CMK-3 are characterized by X-ray diffraction...

Herein, we report bifunctional molybdenum-doped nickel sulfide on foam (Mo-NiSx/NF) for magnetic field-enhanced overall water splitting under alkaline conditions. Proper doping of Mo can lead to optimization the electronic structure NiSx, which accelerates dissociation H2O and adsorption OH− in hydrogen evolution reaction (HER) oxygen (OER) processes, respectively. In addition, magnetically act...

foam injection is becoming a standard conditioning agent when tunnelling with an earth-pressure balanced shield, resulting in an increasing interest in this technique. the technique is mostly based on empirical rules and experience. to be able to determine what foam and how may foam has to be injected for different soils, it is necessary to know the mechanical parameters of the foam-water-soil ...