Simon Geiger
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View article: Influence of Support Material on the Structural Evolution of Copper during Electrochemical CO<sub>2</sub> Reduction
Influence of Support Material on the Structural Evolution of Copper during Electrochemical CO<sub>2</sub> Reduction Open
The copper‐catalyzed electrochemical CO 2 reduction reaction represents an elegant pathway to reduce CO 2 emissions while producing a wide range of valuable hydrocarbons. The selectivity for these products depends strongly on the structure…
View article: High performing and economic platinum group metal free anode catalysts for AEM and PEM electrolyzers: Opportunities and Challenges
High performing and economic platinum group metal free anode catalysts for AEM and PEM electrolyzers: Opportunities and Challenges Open
View article: Towards maximized utilization of iridium for the acidic oxygen evolution reaction
Towards maximized utilization of iridium for the acidic oxygen evolution reaction Open
The reduction in noble metal content for efficient oxygen evolution catalysis is a crucial aspect towards the large scale commercialisation of polymer electrolyte membrane electrolyzers. Since catalytic stability and activity are inversely…
View article: Degradation of iridium oxides <i>via</i> oxygen evolution from the lattice: correlating atomic scale structure with reaction mechanisms
Degradation of iridium oxides <i>via</i> oxygen evolution from the lattice: correlating atomic scale structure with reaction mechanisms Open
Combination of atom probe tomography, isotope-labelling and online electrochemical mass spectrometry provides direct correlation of atomic scale structure of Ir oxide catalysts with the mechanism of oxygen formation from the lattice atoms.
View article: The stability number as a metric for electrocatalyst stability benchmarking
The stability number as a metric for electrocatalyst stability benchmarking Open
View article: Die gemeinsamen Zwischenprodukte von Sauerstoffentwicklung und Auflösung während der Wasserelektrolyse an Iridium
Die gemeinsamen Zwischenprodukte von Sauerstoffentwicklung und Auflösung während der Wasserelektrolyse an Iridium Open
Dem Wissen über Reaktionsmechanismen beim Katalysatorabbau während der Sauerstoffentwicklung kommt eine Schlüsselrolle bei der Weiterentwicklung von effizienteren und stabileren Elektrolyseuren zu, da die korrosiven Bedingungen an der Anod…
View article: The Common Intermediates of Oxygen Evolution and Dissolution Reactions during Water Electrolysis on Iridium
The Common Intermediates of Oxygen Evolution and Dissolution Reactions during Water Electrolysis on Iridium Open
Understanding the pathways of catalyst degradation during the oxygen evolution reaction is a cornerstone in the development of efficient and stable electrolyzers, since even for the most promising Ir based anodes the harsh reaction conditi…
View article: Stability investigations of iridium-based catalysts towards acidic water splitting
Stability investigations of iridium-based catalysts towards acidic water splitting Open
Wasserelektrolyse, basierend auf der PEM-Technik (proton exchange membrane), ist ein vielversprechendes Verfahren zur Speicherung erneuerbarer Energie. Aufgrund der Abhängigkeit von Edelmetallkatalysatoren (bsp. Iridium) ist eine großtechn…
View article: Stability limits of tin-based electrocatalyst supports
Stability limits of tin-based electrocatalyst supports Open
View article: Using Instability of a Non-stoichiometric Mixed Oxide Oxygen Evolution Catalyst As a Tool to Improve Its Electrocatalytic Performance
Using Instability of a Non-stoichiometric Mixed Oxide Oxygen Evolution Catalyst As a Tool to Improve Its Electrocatalytic Performance Open
Owing to their superior electrocatalytic performance, non-stoichiometric mixed oxides are often considered as promising electrocatalysts for the acidic oxygen evolution reaction (OER). Their activity and stability can be superior to those …
View article: Highly active nanostructured palladium-ceria electrocatalysts for the hydrogen oxidation reaction in alkaline medium
Highly active nanostructured palladium-ceria electrocatalysts for the hydrogen oxidation reaction in alkaline medium Open
View article: Addressing stability challenges of using bimetallic electrocatalysts: the case of gold–palladium nanoalloys
Addressing stability challenges of using bimetallic electrocatalysts: the case of gold–palladium nanoalloys Open
Studying changes in surface composition of bimetallic (AuPd) catalysts under dealloying is of key importance for predicting their stability during application.
View article: Platinum recycling going green via induced surface potential alteration enabling fast and efficient dissolution
Platinum recycling going green via induced surface potential alteration enabling fast and efficient dissolution Open
The recycling of precious metals, for example, platinum, is an essential aspect of sustainability for the modern industry and energy sectors. However, due to its resistance to corrosion, platinum-leaching techniques rely on high reagent co…
View article: Activity and Stability of Electrochemically and Thermally Treated Iridium for the Oxygen Evolution Reaction
Activity and Stability of Electrochemically and Thermally Treated Iridium for the Oxygen Evolution Reaction Open
Iridium is the main element in modern catalysts for the oxygen evolution reaction (OER) in proton exchange membrane water electrolyzers (PEMWE), which is predominantly due to its relatively good activity and tolerable stability in harsh PE…
View article: On the Origin of the Improved Ruthenium Stability in RuO<sub>2</sub>–IrO<sub>2</sub>Mixed Oxides
On the Origin of the Improved Ruthenium Stability in RuO<sub>2</sub>–IrO<sub>2</sub>Mixed Oxides Open
High oxygen evolution reaction activity of ruthenium and long term stability of iridium in acidic electrolytes make their mixed oxides attractive candidates for utilization as anodes in water electrolyzers. Indeed, such materials were addr…
View article: On the Need of Improved Accelerated Degradation Protocols (ADPs): Examination of Platinum Dissolution and Carbon Corrosion in Half-Cell Tests
On the Need of Improved Accelerated Degradation Protocols (ADPs): Examination of Platinum Dissolution and Carbon Corrosion in Half-Cell Tests Open
In this work we employ the advanced scanning flow cell based analytical techniques, viz. inductively coupled plasma mass spectrometry (SFC-ICP-MS) and on-line electrochemical mass-spectrometry (SFC-OLEMS) to directly detect the amounts of …
View article: Dissolution of Platinum in the Operational Range of Fuel Cells
Dissolution of Platinum in the Operational Range of Fuel Cells Open
The front cover artwork is provided by the Electrocatalysis Group at the Max‐Planck‐Institut für Eisenforschung GmbH (Germany). The image shows, symbolically, the investigation of the dissolution of carbon‐supported platinum nanoparticles …
View article: Cover Picture: Dissolution of Platinum in the Operational Range of Fuel Cells (ChemElectroChem 10/2015)
Cover Picture: Dissolution of Platinum in the Operational Range of Fuel Cells (ChemElectroChem 10/2015) Open
The Front Cover picture depicts the dissolution of carbon-supported platinum fuel cell catalyst in an acidic electrochemical environment. Detection of dissolved species is made possible by employing a unique combination of a novel scanning…
View article: Dissolution of Platinum in the Operational Range of Fuel Cells
Dissolution of Platinum in the Operational Range of Fuel Cells Open
One of the most important practical issues in low‐temperature fuel‐cell catalyst degradation is platinum dissolution. According to the literature, it initiates at 0.6–0.9 V RHE , whereas previous time‐ and potential‐resolved inductively co…