Risch, Marcel

[["dc.bibliographiccitation.firstpage","17682"],["dc.bibliographiccitation.issue","33"],["dc.bibliographiccitation.journal","The Journal of Physical Chemistry C"],["dc.bibliographiccitation.lastpage","17692"],["dc.bibliographiccitation.volume","121"],["dc.contributor.author","Risch, Marcel"],["dc.contributor.author","Stoerzinger, Kelsey A."],["dc.contributor.author","Han, Binghong"],["dc.contributor.author","Regier, Tom Z."],["dc.contributor.author","Peak, Derek"],["dc.contributor.author","Sayed, Sayed Youssef"],["dc.contributor.author","Wei, Chao"],["dc.contributor.author","Xu, Zhichuan"],["dc.contributor.author","Shao-Horn, Yang"],["dc.date.accessioned","2020-12-10T15:22:44Z"],["dc.date.available","2020-12-10T15:22:44Z"],["dc.date.issued","2017"],["dc.identifier.doi","10.1021/acs.jpcc.7b05592"],["dc.identifier.eissn","1932-7455"],["dc.identifier.issn","1932-7447"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/73518"],["dc.language.iso","en"],["dc.notes.intern","DOI Import GROB-354"],["dc.title","Redox Processes of Manganese Oxide in Catalyzing Oxygen Evolution and Reduction: An in Situ Soft X-ray Absorption Spectroscopy Study"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","F813"],["dc.bibliographiccitation.issue","10"],["dc.bibliographiccitation.journal","Journal of The Electrochemical Society"],["dc.bibliographiccitation.lastpage","F820"],["dc.bibliographiccitation.volume","165"],["dc.contributor.author","Han, Binghong"],["dc.contributor.author","Risch, Marcel"],["dc.contributor.author","Belden, Samuel"],["dc.contributor.author","Lee, Seonggyu"],["dc.contributor.author","Bayer, Domnik"],["dc.contributor.author","Mutoro, Eva"],["dc.contributor.author","Shao-Horn, Yang"],["dc.date.accessioned","2018-10-17T06:52:21Z"],["dc.date.available","2018-10-17T06:52:21Z"],["dc.date.issued","2018"],["dc.description.abstract","he lack of stable and economic supporting materials at high voltages hampers the development of electrocatalysts for oxygen evolution reaction (OER), which is the major source of energy loss in water splitting to produce hydrogen. In this work, we developed systematic methods to evaluate candidate compounds that can potentially replace traditional carbon support for OER catalysts. Stability, economic and conductivity criteria of the oxide support materials were studied and discussed. A nano-sized antimony-doped tin oxide was fabricated to support RuO2, which was shown to provide the highest stability and activity of OER in 0.5 M H2SO4 up to 2.5 VRHE and up to 55°C."],["dc.identifier.doi","10.1149/2.0921810jes"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/16067"],["dc.language.iso","en"],["dc.notes.status","final"],["dc.title","Screening Oxide Support Materials for OER Catalysts in Acid"],["dc.type","journal_article"],["dc.type.internalPublication","unknown"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","27746"],["dc.bibliographiccitation.issue","49"],["dc.bibliographiccitation.journal","The Journal of Physical Chemistry C"],["dc.bibliographiccitation.lastpage","27756"],["dc.bibliographiccitation.volume","120"],["dc.contributor.author","Scholz, Julius"],["dc.contributor.author","Risch, Marcel"],["dc.contributor.author","Stoerzinger, Kelsey A."],["dc.contributor.author","Wartner, Garlef"],["dc.contributor.author","Shao-Horn, Yang"],["dc.contributor.author","Jooss, Christian"],["dc.date.accessioned","2018-11-07T10:04:30Z"],["dc.date.available","2018-11-07T10:04:30Z"],["dc.date.issued","2016"],["dc.description.abstract","Transition-metal oxides with the perovskite structure are promising catalysts to promote the kinetics of the oxygen evolution reaction (OER). To improve the activity and stability of these catalysts, a deeper understanding about the active site, the underlying reaction mechanism, and possible side reactions is necessary. We chose smooth epitaxial (100)-oriented La0.6Sr0.4.MnO3 (LSMO) films grown on Nb:SrTiO3 (STNO) as a model electrode to investigate OER activity and stability using the rotating ring disk electrode (RRDE) method. Careful electrochemical characterization of various films in the thickness range between 10 and 200 nm yields an OER activity of the epitaxial LSMO surface of 100 mu A/cm(ox)(2) at 1.65 V vs RHE, which is among the highest reported for LSMO and close to (110)-oriented IrO2. Detailed post-mortem analysis using XPS, XRD, and AFM revealed the high structural and morphological stability of LSMO after OER. The observed correlation between activity and Mn vacancies on the surface suggested Mn as the active site for the OER in (100)-oriented LSMO, in contrast to similar perovskite manganites, such as Pr1-xCaxMnO3. The observed Tafel slope of about 60 mV/dec matches the theoretical prediction for a chemical rate limiting step that follows an electrochemical pre-equilibrium, probably O-O bond formation. Our study established LSMO as an atomically flat oxide with high intrinsic activity and high stability."],["dc.identifier.doi","10.1021/acs.jpcc.6b07654"],["dc.identifier.isi","000390072100003"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/38708"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.relation","SFB 1073: Kontrolle von Energiewandlung auf atomaren Skalen"],["dc.relation","SFB 1073 | Topical Area C | C01 Hydrid-Anordnungen für die Untersuchung photo-induzierter mehrstufiger katalytischer Prozesse"],["dc.relation.issn","1932-7447"],["dc.relation.orgunit","Institut für Materialphysik"],["dc.title","Rotating Ring-Disk Electrode Study of Oxygen Evolution at a Perovskite Surface: Correlating Activity to Manganese Concentration"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.subtype","original_ja"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","129"],["dc.bibliographiccitation.issue","1"],["dc.bibliographiccitation.journal","Energy & Environmental Science"],["dc.bibliographiccitation.lastpage","136"],["dc.bibliographiccitation.volume","10"],["dc.contributor.author","Park, Joohyuk"],["dc.contributor.author","Risch, Marcel"],["dc.contributor.author","Nam, Gyutae"],["dc.contributor.author","Park, Minjoon"],["dc.contributor.author","Shin, Tae Joo"],["dc.contributor.author","Park, S."],["dc.contributor.author","Kim, Min Gyu"],["dc.contributor.author","Shao-Horn, Yang"],["dc.contributor.author","Cho, Jaephil"],["dc.date.accessioned","2018-11-07T10:29:03Z"],["dc.date.available","2018-11-07T10:29:03Z"],["dc.date.issued","2017"],["dc.description.abstract","Oxygen reduction reaction (ORR) or oxygen evolution reaction (OER) electrocatalysts including carbon-, non-precious metal-, metal alloy-, metal oxide-, and carbide/nitride-based materials are of great importance for energy conversion and storage technologies. Among them, metal oxides (e.g., perovskite and pyrochlore) are known to be promising candidates as electrocatalysts. Nevertheless, the intrinsic catalytic activities of pyrochlore oxides are still poorly understood because of the formation of undesirable phases derived from the synthesis processes. Herein, we present highly pure single crystalline pyrochlore nanoparticles with metallic conduction (Pb2Ru2O6.5) as an efficient bi-functional oxygen electrocatalyst. Notably, it has been experimentally shown that the covalency of Ru-O bonds affects the ORR and OER activities by comparing the X-ray absorption near edge structure (XANES) spectra of the metallic Pb2Ru2O6.5 and insulating Sm2Ru2O7 for the first time. Moreover, we followed the interatomic distance changes of Ru-O bonds using in situ X-ray absorption spectroscopy (XAS) to investigate the structural stabilities of the pyrochlore catalysts during electrocatalysis. The highly efficient metallic Pb2Ru2O6.5 exhibited outstanding bi-functional catalytic activities and stabilities for both ORR and OER in aqueous Zn-air batteries."],["dc.identifier.doi","10.1039/c6ee03046g"],["dc.identifier.isi","000395208000010"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/43561"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","PUB_WoS_Import"],["dc.relation.issn","1754-5706"],["dc.relation.issn","1754-5692"],["dc.relation.orgunit","Institut für Materialphysik"],["dc.title","Single crystalline pyrochlore nanoparticles with metallic conduction as efficient bi-functional oxygen electrocatalysts for Zn-air batteries"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.subtype","original_ja"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","6843"],["dc.bibliographiccitation.issue","10"],["dc.bibliographiccitation.journal","ACS Catalysis"],["dc.bibliographiccitation.lastpage","6857"],["dc.bibliographiccitation.volume","7"],["dc.contributor.author","Elias, Joseph S."],["dc.contributor.author","Stoerzinger, Kelsey A."],["dc.contributor.author","Hong, Wesley T."],["dc.contributor.author","Risch, Marcel"],["dc.contributor.author","Giordano, Livia"],["dc.contributor.author","Mansour, Azzam N."],["dc.contributor.author","Shao-Horn, Yang"],["dc.date.accessioned","2020-12-10T15:22:32Z"],["dc.date.available","2020-12-10T15:22:32Z"],["dc.date.issued","2017"],["dc.identifier.doi","10.1021/acscatal.7b01600"],["dc.identifier.eissn","2155-5435"],["dc.identifier.issn","2155-5435"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/73437"],["dc.language.iso","en"],["dc.notes.intern","DOI Import GROB-354"],["dc.relation.orgunit","Institut für Materialphysik"],["dc.title","In Situ Spectroscopy and Mechanistic Insights into CO Oxidation on Transition-Metal-Substituted Ceria Nanoparticles"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.subtype","original_ja"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.artnumber","e1806296"],["dc.bibliographiccitation.issue","31"],["dc.bibliographiccitation.journal","Advanced Materials"],["dc.bibliographiccitation.volume","31"],["dc.contributor.author","Wei, Chao"],["dc.contributor.author","Rao, Reshma R."],["dc.contributor.author","Peng, Jiayu"],["dc.contributor.author","Huang, Botao"],["dc.contributor.author","Stephens, Ifan E. L."],["dc.contributor.author","Risch, Marcel"],["dc.contributor.author","Xu, Zhichuan J."],["dc.contributor.author","Shao-Horn, Yang"],["dc.date.accessioned","2019-08-07T12:57:41Z"],["dc.date.available","2019-08-07T12:57:41Z"],["dc.date.issued","2019"],["dc.description.abstract","Electrochemical energy storage by making H2 an energy carrier from water splitting relies on four elementary reactions, i.e., the hydrogen evolution reaction (HER), hydrogen oxidation reaction (HOR), oxygen evolution reaction (OER), and oxygen reduction reaction (ORR). Herein, the central objective is to recommend systematic protocols for activity measurements of these four reactions and benchmark activities for comparison, which is critical to facilitate the research and development of catalysts with high activity and stability. Details for the electrochemical cell setup, measurements, and data analysis used to quantify the kinetics of the HER, HOR, OER, and ORR in acidic and basic solutions are provided, and examples of state-of-the-art specific and mass activity of catalysts to date are given. First, the experimental setup is discussed to provide common guidelines for these reactions, including the cell design, reference electrode selection, counter electrode concerns, and working electrode preparation. Second, experimental protocols, including data collection and processing such as ohmic- and background-correction and catalyst surface area estimation, and practice for testing and comparing different classes of catalysts are recommended. Lastly, the specific and mass activity activities of some state-of-the-art catalysts are benchmarked to facilitate the comparison of catalyst activity for these four reactions across different laboratories."],["dc.identifier.doi","10.1002/adma.201806296"],["dc.identifier.pmid","30656754"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/62346"],["dc.language.iso","en"],["dc.notes.status","final"],["dc.relation.eissn","1521-4095"],["dc.relation.issn","0935-9648"],["dc.relation.issn","1521-4095"],["dc.relation.orgunit","Institut für Materialphysik"],["dc.title","Recommended Practices and Benchmark Activity for Hydrogen and Oxygen Electrocatalysis in Water Splitting and Fuel Cells"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.subtype","original_ja"],["dspace.entity.type","Publication"]]