Electrocatalytic Water Oxidation by MnO/C: In Situ Catalyst Formation, Carbon Substrate Variations, and Direct O2/CO2 Monitoring by Membrane-Inlet Mass Spectrometry. Melder, J., Kwong, W. L., Shevela, D., Messinger, J., & Kurz, P. ChemSusChem, 10(22):4491–4502, 2017. _eprint: https://onlinelibrary.wiley.com/doi/pdf/10.1002/cssc.201701383![Electrocatalytic Water Oxidation by MnO/C: In Situ Catalyst Formation, Carbon Substrate Variations, and Direct O2/CO2 Monitoring by Membrane-Inlet Mass Spectrometry [link]](https://bibbase.org/img/filetypes/link.svg "link")
Paper doi abstract bibtex Layers of amorphous manganese oxides were directly formed on the surfaces of different carbon materials by exposing the carbon to aqueous solutions of permanganate (MnO4−) followed by sintering at 100–400 °C. During electrochemical measurements in neutral aqueous buffer, nearly all of the MnOx/C electrodes show significant oxidation currents at potentials relevant for the oxygen evolution reaction (OER). However, by combining electrolysis with product detection by using mass spectrometry, it was found that these currents were only strictly linked to water oxidation if MnOx was deposited on graphitic carbon materials (faradaic O2 yields \textgreater90 %). On the contrary, supports containing sp3-C were found to be unsuitable as the OER is accompanied by carbon corrosion to CO2. Thus, choosing the “right” carbon material is crucial for the preparation of stable and efficient MnOx/C anodes for water oxidation catalysis. For MnOx on graphitic substrates, current densities of \textgreater1 mA cm−2 at η=540 mV could be maintained for at least 16 h of continuous operation at pH 7 (very good values for electrodes containing only abundant elements such as C, O, and Mn) and post-operando measurements proved the integrity of both the catalyst coating and the underlying carbon at OER conditions.
@article{melder_electrocatalytic_2017,
title = {Electrocatalytic {Water} {Oxidation} by {MnO}/{C}: {In} {Situ} {Catalyst} {Formation}, {Carbon} {Substrate} {Variations}, and {Direct} {O2}/{CO2} {Monitoring} by {Membrane}-{Inlet} {Mass} {Spectrometry}},
volume = {10},
copyright = {© 2017 Wiley-VCH Verlag GmbH \& Co. KGaA, Weinheim},
issn = {1864-564X},
shorttitle = {Electrocatalytic {Water} {Oxidation} by {MnO}/{C}},
url = {https://onlinelibrary.wiley.com/doi/abs/10.1002/cssc.201701383},
doi = {10.1002/cssc.201701383},
abstract = {Layers of amorphous manganese oxides were directly formed on the surfaces of different carbon materials by exposing the carbon to aqueous solutions of permanganate (MnO4−) followed by sintering at 100–400 °C. During electrochemical measurements in neutral aqueous buffer, nearly all of the MnOx/C electrodes show significant oxidation currents at potentials relevant for the oxygen evolution reaction (OER). However, by combining electrolysis with product detection by using mass spectrometry, it was found that these currents were only strictly linked to water oxidation if MnOx was deposited on graphitic carbon materials (faradaic O2 yields {\textgreater}90 \%). On the contrary, supports containing sp3-C were found to be unsuitable as the OER is accompanied by carbon corrosion to CO2. Thus, choosing the “right” carbon material is crucial for the preparation of stable and efficient MnOx/C anodes for water oxidation catalysis. For MnOx on graphitic substrates, current densities of {\textgreater}1 mA cm−2 at η=540 mV could be maintained for at least 16 h of continuous operation at pH 7 (very good values for electrodes containing only abundant elements such as C, O, and Mn) and post-operando measurements proved the integrity of both the catalyst coating and the underlying carbon at OER conditions.},
language = {en},
number = {22},
urldate = {2024-12-10},
journal = {ChemSusChem},
author = {Melder, Jens and Kwong, Wai Ling and Shevela, Dmitriy and Messinger, Johannes and Kurz, Philipp},
year = {2017},
note = {\_eprint: https://onlinelibrary.wiley.com/doi/pdf/10.1002/cssc.201701383},
keywords = {carbon materials, electrocatalysis, manganese, mass spectrometry, oxides},
pages = {4491--4502},
}
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