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Cover Feature: Electrocatalytic Water Oxidation by MnO x /C: In Situ Catalyst Formation, Carbon Substrate Variations, and Direct O 2 /CO 2 Monitoring by Membrane‐Inlet Mass Spectrometry (ChemSusChem 22/2017)
Author(s) -
Melder Jens,
Kwong Wai Ling,
Shevela Dmitriy,
Messinger Johannes,
Kurz Philipp
Publication year - 2017
Publication title -
chemsuschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.412
H-Index - 157
eISSN - 1864-564X
pISSN - 1864-5631
DOI - 10.1002/cssc.201702129
Subject(s) - catalysis , carbon fibers , permanganate , manganese , substrate (aquarium) , faraday efficiency , materials science , inorganic chemistry , chemical engineering , anode , chemistry , electrode , metallurgy , composite material , organic chemistry , oceanography , engineering , composite number , geology
The Cover Feature shows a new anode type for water‐oxidation catalysis and its combination with the direct monitoring of gaseous reaction products by mass‐spectrometry. Here, layered manganese oxides (birnessites) were directly deposited on carbon during reactions of permanganate with different—also nanostructured—carbon substrates. The highest and most stable water‐oxidation currents were observed for birnessites on graphitic carbon where mass spectra confirmed high faradaic O 2 yields. On the other hand, supports containing more sp 3 carbon atoms corroded, leading to significant CO 2 evolution. The good performance and low material cost of MnO x /C graphitic anodes makes them, for example, attractive components for light‐driven water electrolysers. More information can be found in the Full Paper by Melder et al. on page 4491 in Issue 22, 2017 (DOI: 10.1002/cssc.201701383).