Oxygen reduction at chalcogenide model surfaces
Final Report Abstract
The surface chemistry of Se modified surface is very rich, but also rather complicated. STM results were very helpful not only for the analysis of the atomic structure of an adsorbed Se monolayer on Rh(111), but also for the understanding the coverage and potential dependent structural changes including place exchange. Unfortunately, in the limited time (and with only one PhD student) we were not yet able to establish a reliable method to determine the number of free Ru sites on a heat treated Rh surface or the surface Se concentration. Such surfaces seem to have interesting catalytic activities: not only is the oxygen reduction shifted by 80 mV in positive direction (which is still far from the activity of Pt), but also the hydrogen evolution and oxidation of adsorbed CO resembles that of Pt. I believe we laid the basis for future necessary research on this topic.
Publications
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"Surface morphological studies of Nafion®/Pt(100) interface". Electrochimica Acta 144 (2014) 141-146
Iqbal, S.; Podgaynyy, N.; Ahmed, M.; Attard, G.A. & Baltruschat, H.
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Quantitative Determination of H2Se at Model Metal fcc(111) Selenide Surface: DEMS, STM, and AFM Studies, J. Phys. Chem. C 2015, 119, 20515−20523
Iqbal, Shahid; Bondü, Christoph & Baltruschat, Helmut
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“Selenium modification of Rh(111) surfaces - Structure and electroactivity for oxygen reduction” Rheinischen Friedrich-Wilhelms-Universität Bonn, Bonn, 2015
Shahid Iqbal
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(2018) Oxygen Reduction on Rh(111) and Se-Modified Rh(111) Surfaces. Electrocatalysis 9 (1) 40–46
Iqbal, Shahid & Baltruschat, Helmut
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(2018) Surface morphology and adlayer structure of Se on Rh(111). Physical chemistry chemical physics : PCCP 20 (9) 6176–6186
Iqbal, Shahid; Zan, Lingxing; Nardi, Elena & Baltruschat, Helmut
