Tunable Biogenic Manganese Oxides

Alexandr N. Simonov; Rosalie K. Hocking; Lizhi Tao; Thomas R Gengenbach; Timothy Williams; Xi Ya Fang; Hannah J King; Shannon A. Bonke; Dijon A. Hoogeveen; Christine A. Romano; Bradley M. Tebo; Lisandra L. Martin; William H. Casey; Leone Spiccia

doi:10.1002/chem.201702579

Tunable Biogenic Manganese Oxides

Alexandr N. Simonov, Rosalie K. Hocking, Lizhi Tao, Thomas R Gengenbach, Timothy Williams, Xi Ya Fang, Hannah J King, Shannon A. Bonke, Dijon A. Hoogeveen, Christine A. Romano, Bradley M. Tebo, Lisandra L. Martin, William H. Casey, Leone Spiccia

Research output: Contribution to journal › Article › Research › peer-review

8 Citations (Scopus)

Abstract

Influence of the conditions for aerobic oxidation of Mn2+(aq) 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 20nm, or a combination of the two. Mineralisation in solutions that contain Fe2+(aq) makes solids with significant disorder in the structure, while the presence of Ca2+(aq) 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.

Original language	English
Pages (from-to)	13482-13492
Number of pages	11
Journal	Chemistry - A European Journal
Volume	23
Issue number	54
DOIs	https://doi.org/10.1002/chem.201702579
Publication status	Published - 27 Sept 2017

Keywords

Biogenic materials
Manganese
MnxEFG protein complex
Structural disorder
Structure elucidation
Tunable morphology

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10.1002/chem.201702579

Cite this

@article{809e204937c94020b36619d38610b316,

title = "Tunable Biogenic Manganese Oxides",

abstract = "Influence of the conditions for aerobic oxidation of Mn2+(aq) catalysed by the MnxEFG protein complex on the morphology, structure and reactivity of the resulting biogenic manganese oxides (MnOx) is explored. Physical characterisation of MnOx includes scanning and transmission electron microscopy, and X-ray photoelectron and K-edge Mn, Fe X-ray absorption spectroscopy. This characterisation reveals that the MnOx 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 MnOx either as nm-thin sheets, or rods with diameters below 20nm, or a combination of the two. Mineralisation in solutions that contain Fe2+(aq) makes solids with significant disorder in the structure, while the presence of Ca2+(aq) facilitates formation of more ordered materials. The (photo)oxidation and (photo)electrocatalytic capacity of the MnOx minerals is examined and correlated with their structural properties.",

keywords = "Biogenic materials, Manganese, MnxEFG protein complex, Structural disorder, Structure elucidation, Tunable morphology",

author = "Simonov, {Alexandr N.} and Hocking, {Rosalie K.} and Lizhi Tao and Gengenbach, {Thomas R} and Timothy Williams and Fang, {Xi Ya} and King, {Hannah J} and Bonke, {Shannon A.} and Hoogeveen, {Dijon A.} and Romano, {Christine A.} and Tebo, {Bradley M.} and Martin, {Lisandra L.} and Casey, {William H.} and Leone Spiccia",

year = "2017",

month = sep,

day = "27",

doi = "10.1002/chem.201702579",

language = "English",

volume = "23",

pages = "13482--13492",

journal = "Chemistry - A European Journal",

issn = "0947-6539",

publisher = "Wiley-VCH Verlag GmbH & Co. KGaA",

number = "54",

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T1 - Tunable Biogenic Manganese Oxides

AU - Simonov, Alexandr N.

AU - Hocking, Rosalie K.

AU - Tao, Lizhi

AU - Gengenbach, Thomas R

AU - Williams, Timothy

AU - Fang, Xi Ya

AU - King, Hannah J

AU - Bonke, Shannon A.

AU - Hoogeveen, Dijon A.

AU - Romano, Christine A.

AU - Tebo, Bradley M.

AU - Martin, Lisandra L.

AU - Casey, William H.

AU - Spiccia, Leone

PY - 2017/9/27

Y1 - 2017/9/27

N2 - Influence of the conditions for aerobic oxidation of Mn2+(aq) catalysed by the MnxEFG protein complex on the morphology, structure and reactivity of the resulting biogenic manganese oxides (MnOx) is explored. Physical characterisation of MnOx includes scanning and transmission electron microscopy, and X-ray photoelectron and K-edge Mn, Fe X-ray absorption spectroscopy. This characterisation reveals that the MnOx 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 MnOx either as nm-thin sheets, or rods with diameters below 20nm, or a combination of the two. Mineralisation in solutions that contain Fe2+(aq) makes solids with significant disorder in the structure, while the presence of Ca2+(aq) facilitates formation of more ordered materials. The (photo)oxidation and (photo)electrocatalytic capacity of the MnOx minerals is examined and correlated with their structural properties.

AB - Influence of the conditions for aerobic oxidation of Mn2+(aq) catalysed by the MnxEFG protein complex on the morphology, structure and reactivity of the resulting biogenic manganese oxides (MnOx) is explored. Physical characterisation of MnOx includes scanning and transmission electron microscopy, and X-ray photoelectron and K-edge Mn, Fe X-ray absorption spectroscopy. This characterisation reveals that the MnOx 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 MnOx either as nm-thin sheets, or rods with diameters below 20nm, or a combination of the two. Mineralisation in solutions that contain Fe2+(aq) makes solids with significant disorder in the structure, while the presence of Ca2+(aq) facilitates formation of more ordered materials. The (photo)oxidation and (photo)electrocatalytic capacity of the MnOx minerals is examined and correlated with their structural properties.

KW - Biogenic materials

KW - Manganese

KW - MnxEFG protein complex

KW - Structural disorder

KW - Structure elucidation

KW - Tunable morphology

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U2 - 10.1002/chem.201702579

DO - 10.1002/chem.201702579

M3 - Article

AN - SCOPUS:85028416046

SN - 0947-6539

VL - 23

SP - 13482

EP - 13492

JO - Chemistry - A European Journal

JF - Chemistry - A European Journal

IS - 54

ER -

Tunable Biogenic Manganese Oxides

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Keywords

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ARC Centre of Excellence for Electromaterials Science

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Tunable Biogenic Manganese Oxides

Abstract

Keywords

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ARC Centre of Excellence for Electromaterials Science

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