Cover Feature: Electrocatalytic Water Oxidation by MnOx/C: In Situ Catalyst Formation, Carbon Substrate Variations, and Direct O2/CO2 Monitoring by Membrane‐Inlet Mass Spectrometry (ChemSusChem 22/2017),ChemSusChem

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Cover Feature: Electrocatalytic Water Oxidation by MnOx/C: In Situ Catalyst Formation, Carbon Substrate Variations, and Direct O2/CO2 Monitoring by Membrane‐Inlet Mass Spectrometry (ChemSusChem 22/2017)
ChemSusChem ( IF 7.5 ) Pub Date : 2017-11-16 , DOI: 10.1002/cssc.201702129
Jens Melder ₁ , Wai Ling Kwong _{2,

3} , Dmitriy Shevela ₃ , Johannes Messinger _{2,

3} , Philipp Kurz ₁

Affiliation

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 O₂ yields. On the other hand, supports containing more sp³ carbon atoms corroded, leading to significant CO₂ 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).

中文翻译：

封面功能：通过MnOx / C进行电催化水氧化：原位催化剂形成，碳基质变化以及通过膜入口质谱法直接监测O2 / CO2（ChemSusChem 22/2017）

Cover Feature展示了一种用于水氧化催化的新型阳极，它与通过质谱法直接监测气态反应产物相结合。在此，在高锰酸盐与不同的（也是纳米结构的）碳底物反应期间，层状锰氧化物（水钠锰矿）直接沉积在碳上。石墨碳上的水钠锰矿观察到最高和最稳定的水氧化电流，质谱图证实了法拉第O _2的高产率。另一方面，含有更多sp ³碳原子的载体被腐蚀，导致大量的CO ₂释放。MnO _x / C_石墨的良好性能和较低的材料成本阳极使它们成为光驱动水电解槽的诱人组件。可以在Melder等人的“全文”中找到更多信息。就在第22期，2017年4491页（：10.1002 / cssc.201701383 DOI）。

更新日期：2017-11-16

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