نتایج جستجو برای: co2 activation
تعداد نتایج: 496095 فیلتر نتایج به سال:
A new preparative route for vanadium phosphate catalysts is described using supercritical CO2 as an antisolvent. The amorphous microspheroidal VPO produced is shown to be more active than comparable crystalline VPO catalysts for the selective oxidation of n-butane to maleic anhydride and, furthermore, does not require an extensive pre-treatment or activation period to establish full catalytic a...
The dye-sensitized photoelectrosynthesis cell (DSPEC) integrates high bandgap, nanoparticle oxide semiconductors with the light-absorbing and catalytic properties of designed chromophore-catalyst assemblies. The goals are photoelectrochemical water splitting into hydrogen and oxygen and reduction of CO2 by water to give oxygen and carbon-based fuels. Solar-driven water oxidation occurs at a pho...
Sustainable future energy scenarios require significant efficiency improvements in both electricity generation and storage. High-temperature solid oxide cells, and in particular carbon dioxide electrolysers, afford chemical storage of available electricity that can both stabilize and extend the utilization of renewables. Here we present a double doping strategy to facilitate CO2 reduction at pe...
The binding of ribulose 1,5-bisphosphate (RuBP) to inactive (noncarbamylated) sites of the enzyme RuBP carboxylase in vivo was investigated in Spinacla oleracea and Helianthus annuus. The concentrations of RuBP and inactive sites were determined in leaf ffssue as a function of time after a change to darkness. RuBP concentrations fell rapidly after the change to darkness and were approximately e...
Soybean (Glycine max L. Merr. cv. Bragg), peanut (Arachis hypogaea L. cv. Georgia Green) and rice (Oryza saliva L. cv. IR-72) were grown for a full season in sunlit, controlled-environment chambers at 350 (ambient) and 700 (double-ambient, elevated) imol CO2 moF' air, and under daytime maximum/nighttime minimum air temperature regimes ranging from 28/18 to 48/38°C for soybean and peanut, or soi...
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