In:
Chemistry – A European Journal, Wiley, Vol. 23, No. 54 ( 2017-09-27), p. 13482-13492
Kurzfassung:
Influence of the conditions for aerobic oxidation of catalysed by the MnxEFG protein complex on the morphology, structure and reactivity of the resulting biogenic manganese oxides (MnO x ) is explored. Physical characterisation of MnO x includes scanning and transmission electron microscopy, and X‐ray photoelectron and K‐edge Mn, Fe X‐ray absorption spectroscopy. This characterisation reveals that the MnO x materials share the structural features of birnessite, yet differ in the degree of structural disorder. Importantly, these biogenic products exhibit strikingly different morphologies that can be easily controlled. Changing the substrate‐to‐protein ratio produces MnO x either as nm‐thin sheets, or rods with diameters below 20 nm, or a combination of the two. Mineralisation in solutions that contain makes solids with significant disorder in the structure, while the presence of facilitates formation of more ordered materials. The (photo)oxidation and (photo)electrocatalytic capacity of the MnO x minerals is examined and correlated with their structural properties.
Materialart:
Online-Ressource
ISSN:
0947-6539
,
1521-3765
DOI:
10.1002/chem.201702579
Sprache:
Englisch
Verlag:
Wiley
Publikationsdatum:
2017
ZDB Id:
1478547-X