Novel Sample-Stage for Combined Near Ambient Pressure X-ray Photoelectron Spectroscopy, Catalytic Characterization and Electrochemical Impedance Spectroscopy
Abstract
:1. Introduction
2. Experimental
2.1. General Considerations
2.2. Sample-Stage and Sample Mounting
2.3. Fabrication of the Electrochemical Model Cell
3. Proof of Concept
3.1. Layout of Experiments
3.2. MS Results
3.3. NAP-XPS Results
3.4. Electrochemical Characterization
4. Conclusions
Author Contributions
Funding
Acknowledgments
Conflicts of Interest
References
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Ratio Co0/Fe0 | |
---|---|
0.7 mbar H2 + H2O, 500 °C | 0.6 |
0.7 mbar H2 + H2O, 600 °C | 2.5 |
0.7 mbar H2 + H2O, 600 °C, −250 mV bias | 0.5 |
Conditions | Rpol (Ω) | (mol cm−2 s−1) | Fe2+ + Co2+ (EIS) | Fe0 (XPS) | Co0 (XPS) |
---|---|---|---|---|---|
O2 | - | - | - | 0% | 0% |
H2 + H2O 500 °C | 147,000 | 0.4% | <3% | 7% | |
H2 + H2O 600 °C | 36,000 | 0.36% | <4% | 42% | |
H2 + H2O 600 °C, −250 mV bias | 3600 | (net reaction) | 2.2% | 17% | 49% |
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Rameshan, R.; Nenning, A.; Raschhofer, J.; Lindenthal, L.; Ruh, T.; Summerer, H.; Opitz, A.K.; Martin Huber, T.; Rameshan, C. Novel Sample-Stage for Combined Near Ambient Pressure X-ray Photoelectron Spectroscopy, Catalytic Characterization and Electrochemical Impedance Spectroscopy. Crystals 2020, 10, 947. https://doi.org/10.3390/cryst10100947
Rameshan R, Nenning A, Raschhofer J, Lindenthal L, Ruh T, Summerer H, Opitz AK, Martin Huber T, Rameshan C. Novel Sample-Stage for Combined Near Ambient Pressure X-ray Photoelectron Spectroscopy, Catalytic Characterization and Electrochemical Impedance Spectroscopy. Crystals. 2020; 10(10):947. https://doi.org/10.3390/cryst10100947
Chicago/Turabian StyleRameshan, Raffael, Andreas Nenning, Johannes Raschhofer, Lorenz Lindenthal, Thomas Ruh, Harald Summerer, Alexander Karl Opitz, Tobias Martin Huber, and Christoph Rameshan. 2020. "Novel Sample-Stage for Combined Near Ambient Pressure X-ray Photoelectron Spectroscopy, Catalytic Characterization and Electrochemical Impedance Spectroscopy" Crystals 10, no. 10: 947. https://doi.org/10.3390/cryst10100947