Electrochemistry

It is difficult to compare accurately burn times/lighting durations between different manufactures hands-free lighting products since each manufacturer’s reference figures that show their product offering to have an advantage over competitive products. Some manufacturers state statistics of burn time calculated to times long after the emitted light output is useful (down to the last photon). Petzl clearly states it operates a policy whereby it ceases to consider a light effective when the lighting

Stage 2 Chemistry Investigation Folio: Practical – Galvanic Cell Name: YY Names of Partner: ZZ Part A Investigation Design Proposal: Purpose of Experiment: To determine the effect of concentration of reactants on the current produced by a galvanic cell. Hypothesis: The greater the concentration of solution in the two half cells reacting with the two metals to produce current, the greater the flow of current will be produced from the galvanic cell. Independent Variable: Concentration

Another approach to reduce the cathodic voltage losses is to replace metal based electrocatalyst with semi-conductor aided by a renewable energy source, such as solar energy. This resulted in the development of photo-electrocatalysts for MFC applications, which significantly improved the cathodic ORR 30,32. In this innovative application, there are robust synergies between the anode respiration and photo-electrocatalysis of ORR in the cathode (Figure 7). In this new design which known as solar microbial

For the past 200 years, human society has had a ravenous appetite for fossil fuels. The huge increase in human population and also the industrial revolution were the major sources of fossil fuel consumption. However it is becoming obvious that our dependence on fossil fuels is causing many problems that we are going to have to address. We now consume ~ 13 terawatts (TW) of energy worldwide but an additional 10 TW of energy will be required to maintain present lifestyles by 2050 (Chae et al. 2009)

In class I was introduced to the concepts of batteries and electrochemical cells. I am really interested in batteries and how they work and what goes into making a battery. I was inspired to this experiment mostly because I want to study electrical engineering in university and I wanted to find out the chemistry behind the production of the electrical energy in batteries. During my reading, I found out that the first battery was actually invented by Italian physicist Count Alessandro Volta and was

Abstract Hot tubs are very popular across America due to their relaxation as well as health benefits. Hot tubs have been attributed health benefits ranging from relief of muscle and joint pain, to help in treatment of HIV and other viral infections. Because of this, many people own hot tubs and many more go to health spas where they can use them. On the other hand, hot tubs are not that easy to maintain. A consistent disinfectant level must be maintained in order to inhibit the growth of

Mild steel is an alloy of iron and 0.2 % carbon widely used in construction, as it is readily available, malleable and relatively inexpensive. One use of mild steel is on the hulls of seafaring ships. However, corrosion due to the salt water environment and pounding waves is a major problem with the use of steel. Metallic corrosion is estimated to amount to 4% of a developed country’s GDP per year. Therefore corrosion of mild steel and its prevention are major concerns. Metallic corrosion occurs

N-aminophthalimide as synthon for heterocyclic Schiff bases: Efficient utilization as corrosion inhibitors of mild steel in 0.5 mol.L-1 H2SO4 solution Mohamed M. Abdelaal [a]*, Y.F. Barakat [a], Hamed A. Y. Derbala [b], Hamdy H. Hassan [b] [a] Tabbin Institute for Metallurgical Studies, P.O. Box 109 Helwan, Cairo, Egypt. [b] Chemistry Department, Faculty of Science, Ain Shams University, Abbasiya, Cairo, Egypt, 11566. *Corresponding author: E-mail address: chemtims@yahoo.com Abstract Many Schiff

Voltammetric and SEM investigation of Electrodeposited polyaniline on stainless steel surface in different aqueous sulphuric acid solutions A.A. Al-Owais1, I. S. El-Hallag2 1Chemistry Department, College of Sciences, King Saud University, Saudi Arabia 2Chemistry Department, Faculty of Science, Tanta University, Tanta, 31527, Egypt Abstract. The cyclic potential sweep method was applied to aniline electropolymerization on stainless steel electrode in three different concentration of aqueous

3.1.2 Formation of NiOOH onto SPNE Ni pastes of SPNE were electrodeposited by CV to form Ni(OH)2 and NiOOH as the sources of Ni(II) and Ni(III) ions, respectively, onto the SPNE for 30 cycles from 0 to 1.5 V in 0.1 M NaOH. In the first scan, redox couple peaks of SPNE appeared at 0.614 V. The redox couple peaks of Ni(II)/Ni(III) onto SPNE appeared at 0.538 V (Figure 1(a)). This result shows that Ni(II)/Ni(III) formed well. Moreover, the electrochemical reactions of Ni(II)/Ni(III) redox couples have