Search results
Results from the WOW.Com Content Network
In the 1980s, Lehn observed that Co(I) species were produced in solutions containing CoCl 2, 2,2'-bipyridine (bpy), a tertiary amine, and a Ru(bpy) 3 Cl 2 photosensitizer. The high affinity of CO 2 to cobalt centers led both him and Ziessel to study cobalt centers as electrocatalysts for reduction.
While the Boudouard reaction is used deliberately in some processes, it is undesired in others. In the gas cooled, graphite moderated British nuclear reactors (Magnox and AGR) reaction between the CO 2 coolant and the graphite moderator had to be avoided or at least kept to a minimum. As the equilibrium of the reaction shifts in favor of carbon ...
2 catalyst combined with an Au light absorber accelerated hydrogen sulfide-to-hydrogen reactions. The process is an alternative to the conventional Claus process that operates at 800–1,000 °C (1,470–1,830 °F). [29] A Fe catalyst combined with a Cu light absorber can produce hydrogen from ammonia (NH 3) at ambient temperature using visible ...
The electrochemical reduction of carbon dioxide, also known as CO2RR, is the conversion of carbon dioxide (CO 2) to more reduced chemical species using electrical energy. It represents one potential step in the broad scheme of carbon capture and utilization. [1]
The use of photoredox catalysis to generate reactive heteroatom-centered radicals was first explored in the 1990s. [39] Ru(bipy) 3 ] 2+ was found to catalyze the fragmentation of tosylphenylselenide to phenylselenolate anion and tosyl radical and that a radical chain propagation mechanism allowed the addition of tosyl radical and phenylseleno ...
Paul Sabatier (1854-1941) winner of the Nobel Prize in Chemistry in 1912 and discoverer of the reaction in 1897. The Sabatier reaction or Sabatier process produces methane and water from a reaction of hydrogen with carbon dioxide at elevated temperatures (optimally 300–400 °C) and pressures (perhaps 3 MPa [1]) in the presence of a nickel catalyst.
Photoexcitation is the first step in a photochemical process where the reactant is elevated to a state of higher energy, an excited state.The first law of photochemistry, known as the Grotthuss–Draper law (for chemists Theodor Grotthuss and John W. Draper), states that light must be absorbed by a chemical substance in order for a photochemical reaction to take place.
Photothermal spectroscopy is a group of high sensitivity spectroscopy techniques used to measure optical absorption and thermal characteristics of a sample. The basis of photothermal spectroscopy is the change in thermal state of the sample resulting from the absorption of radiation. Light absorbed and not lost by emission results in heating.