Several molecular systems have been constructed that mimic various aspects of photosynthesis. Two of these utilize molecular systems that are derived from natural photosynthesis but that incorporate chemically based modifications to produce artificial photosynthetic devices. These devices use artificial photosynthetic pigments to drive chemical reactions across lipid bilayers or use noble metal catalysts to change the function of the photosynthetic process to produce hydrogen and oxygen instead of sugars ethanol and oxygen. Neither of these systems are sufficiently robust to be operated for extended periods of time as energy unit conversion devices, but they have shown that it is possible to produce artificial photosynthetic assemblies that function well in a laboratory setting. (more…)
The basic processes that occur in such a system are well understood. The semiconductor electrode efficiently absorbs light, produci ...
Certain materials, generally metal oxides, can sustain the unassisted photo-electrolysis of water into H2 and O2. The energy co ...
A fuel cell is an electrochemical device that combines hydrogen with oxygen to generate electricity, heat and water to produce. ...
A fuel cell is an electrochemical device that directly converts a fuel to electricity by means of reactions on the surfaces of ...
The fuel cell can trace its roots back to the 1800s when a Welsh-born, Oxford-educated barrister, Sir William Robert Grove, realize ...
Most production systems try to become first full-scale production begins as small toys and devices of concept. The Horizon hydrogen car is an example.
Many people are aware of the need to reduce carbon dioxide emissions. One of the main culprits, of course, are emissions from automotive. (more…)
Hydrogen has many applications when it comes to fuel. It can be used both in internal combustion engines and hydrogen fuel cells. ...
With ethanol’s future uncertain, many commentators see the transportation debate evolving into a war between two other technologies ...
The most commonly researched and most developed application of using hydrogen as a fuel source is in conjunction with a hydrogen fu ...
Mercedes-Benz presented at Geneva Style F800 Concept (the F stands for Mercedes: technology, design and art), a prototype that ...
Most alternative fuel vehicles on the road today were originally designed for gasoline, but converted for use with an alternative f ...
The global cycling of carbon involves both biological and physical processes. Only the biological components are discussed here. Plants and other photosynthetic organisms assimilate CO2 and eventually convert the CO2 to simple sugars trough sugar extraction fermentation. From simple sugars, plants synthesize a variety of compounds and store them in the form of plant tissue. (more…)
The global carbon cycle involves both biological and physical processes. Only the biological components are discussed here. Pla ...
The flux of carbon among terrestrial, aquatic, and atmospheric pools is at least partially controlled by photosynthetic process ...
The accumulation of carbon within a forest growth cycle can be considered in four stages. The initial establishment stage involves ...
Reductions in carbon intensity, C/E, the carbon emitted per unit of energy generated, reflect the degree to which societies decarbo ...
It is of interest to examine potential sources of greenhouse gases sources or atmospheric CO2 by analysis of the global distrib ...
In the mid-1880s, Charles Fritts built the first solar cell formed by selenium coated with a thin layer of gold and with an energy efficiency of 1%. However, it was not until 1954 that Bell Labs discovered accidentally that would be the first commercial solar cell, with silicon as the base. (more…)
So-called thin-film photovoltaic devices are usually based on mixtures of elements other than silicon — most notably copper ind ...
Today, photovoltaic cells only contribute a small proportion (approximately 0.04 percent) of total electricity in the United St ...
So you're finally tired of those exorbitant electricity bills, or, you're catching onto a "greener" way of life. Either way, solar ...
The broad range of home solar energy systems are mostly known as Photovoltaic Systems (PV) or Thin Film Solar Technology. The s ...
Some people may doubt about the ability of these alternative power sources - to much like science fiction they may say. But the ...
The global carbon cycle involves both biological and physical processes. Only the biological components are discussed here. Plants and other photosynthetic organisms assimilate CO2 and eventually convert the CO2 to simple sugars. From simple sugars, (more…)
The global cycling of carbon involves both biological and physical processes. Only the biological components are discussed here. Pl ...
The flux of carbon among terrestrial, aquatic, and atmospheric pools is at least partially controlled by photosynthetic process ...
The accumulation of carbon within a forest growth cycle can be considered in four stages. The initial establishment stage involves ...
Reductions in carbon intensity, C/E, the carbon emitted per unit of energy generated, reflect the degree to which societies decarbo ...
To date, most discussion and research relating to the various of biomass role in mitigating CO2 emissions has been focused around i ...
The flux of carbon among terrestrial, aquatic, and atmospheric pools is at least partially controlled by photosynthetic processes. The relative carbon pool sizes have major effects on global climate system. The CO2 flux among land, sea, and atmosphere has, since the industrial revolution, been disturbed by a rapid injection of (more…)
The global cycling of carbon involves both biological and physical processes. Only the biological components are discussed here. Pl ...
The global carbon cycle involves both biological and physical processes. Only the biological components are discussed here. Pla ...
It is of interest to examine potential sources of greenhouse gases sources or atmospheric CO2 by analysis of the global distrib ...
Climate change caused by the enhanced greenhouse effect is one of the most significant global environmental issues. Increased emiss ...
Since preindustrial times, ambient concentrations of the greenhouse gases have exhibited substantial increases, inter alia CO2 ...