Publications by authors named "Axl X LeVan"

The efficacy of an uncoupled electro-peroxone (E-peroxone) prototype reactor system for the treatment of synthetic graywater is determined. The two-stage E-peroxone process integrates ozonation with the production of hydrogen peroxide (HO) in a first stage reactor before ozone (O) is converted via the peroxone reaction to a hydroxyl radical (OH). The two-stage prototype reactor system allows for the generation of HO via cathodic oxygen reduction in the first-stage reactor before mixing with O in the second-stage reactor.

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Article Synopsis
  • Nitrogenase is an enzyme that converts atmospheric nitrogen (N) into ammonia (NH) through a series of electron transfers involving iron and molybdenum proteins.
  • The P-cluster within the MoFe protein acts as an electron carrier and undergoes structural changes depending on its oxidation state, influencing how it interacts with the iron.
  • Research using electrochemical cells and X-ray crystallography identified three distinct structural states of the P-cluster, highlighting differences in coordination and reinforcing the role of serine hydroxyl in the P state compared to the others.
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An [FeFe]-hydrogenase from Clostridium pasteurianum, CpI, is a model system for biological H activation. In addition to the catalytic H-cluster, CpI contains four accessory iron-sulfur [FeS] clusters in a branched series that transfer electrons to and from the active site. In this work, potentiometric titrations have been employed in combination with electron paramagnetic resonance (EPR) spectroscopy at defined electrochemical potentials to gain insights into the role of the accessory clusters in catalysis.

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