Sunday, July 25, 2010

New Catalyst For Hydrogen Production From Water Sea.

A new type of catalyst that can produce hydrogen from sea water has been developed by researchers in America. Metal-oxo complex catalyst shows catalytic activity and stability are very high, and production cost is relatively cheap, the researchers said.

Hydrogen attracted the attention of researchers due to be made as environmentally friendly fuels. Basically, the hydrogen produced by the reaction between water vapor with methane gas is by using a nickel catalyst, the lack of this method is to produce a gaseous byproduct CO2 yag can cause the greenhouse effect.

Jeffrey Long and colleagues from the University of California, Berkeley, USA, made of molybdenum-oxo complexes that act as elektrokatalis, so that it can reduce the energy needed to make hydrogen from water using mercury electrodes. As there are a lot of metal in the nature of molybdenum as compared with the mercury which for the manufacture of large-scale production required a fairly high cost.

Long explained that the stability of the catalyst due to metal ligand bonding molybdenum at five positions (pentadentat) so that such ties make complexity become strong. Complex molecule is very strong and stable in water environment for long periods of time so we do not see any degradation of catalyst activity after three days of its use, said Long.

In khsus, the catalyst that made Long also stable against impuritas contained in sea water, meaning that sea water can be directly used as production materials without prior treatment. The research team uses seawater from California and produce the same results as those using pure water at neutral pH. In addition, any addition of electrolyte is not necessary if the kit uses sea water, it may reduce production costs and eliminate the use of organic acid as solvent which has a side effect of catalyst performance is medegradasi.

Long and his team hope to be able to develop this system so that future katali is possible can be used with solar panels to generate hydrogen gas. The research team is now modifying the catalyst to reduce the potential where electrochemical reaction occurs and makes the system much better.

A new type of catalyst that can produce hydrogen from sea water has been developed by researchers in America. Metal-oxo complex catalyst shows catalytic activity and stability are very high, and production cost is relatively cheap, the researchers said.

Hydrogen attracted the attention of researchers due to be made as environmentally friendly fuels. Basically, the hydrogen produced by the reaction between water vapor with methane gas is by using a nickel catalyst, the lack of this method is to produce a gaseous byproduct CO2 yag can cause the greenhouse effect.

Jeffrey Long and colleagues from the University of California, Berkeley, USA, made of molybdenum-oxo complexes that act as elektrokatalis, so that it can reduce the energy needed to make hydrogen from water using mercury electrodes. As there are a lot of metal in the nature of molybdenum as compared with the mercury which for the manufacture of large-scale production required a fairly high cost.

Long explained that the stability of the catalyst due to metal ligand bonding molybdenum at five positions (pentadentat) so that such ties make complexity become strong. Complex molecule is very strong and stable in water environment for long periods of time so we do not see any degradation of catalyst activity after three days of its use, said Long.

In khsus, the catalyst that made Long also stable against impuritas contained in sea water, meaning that sea water can be directly used as production materials without prior treatment. The research team uses seawater from California and produce the same results as those using pure water at neutral pH. In addition, any addition of electrolyte is not necessary if the kit uses sea water, it may reduce production costs and eliminate the use of organic acid as solvent which has a side effect of catalyst performance is medegradasi.

Long and his team hope to be able to develop this system so that future katali is possible can be used with solar panels to generate hydrogen gas. The research team is now modifying the catalyst to reduce the potential where electrochemical reaction occurs and makes the system much better.

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