A5063439845- Fuel Cells and Related Materials
- Electrocatalysts for Energy Conversion
- Advanced battery technologies research
- Corrosion Behavior and Inhibition
- Electrochemical Analysis and Applications
- Advanced Battery Technologies Research
- Concrete Corrosion and Durability
- Machine Learning and ELM
- Non-Destructive Testing Techniques
- Catalytic Processes in Materials Science
Technical University of Munich
2023-2024
Huazhong University of Science and Technology
2022
Platinum-yttrium alloys (Pt x Y) are suggested to have superior oxygen reduction reaction (ORR) activity and long-term stability in proton exchange membrane fuel cells (PEMFCs). However, the actual ORR of a Pt Y catalyst with high electrochemically active surface area ( ECSA ) PEMFC remains uncertain. Here, Ketjen black (KB) carbon supported Y/KB (∼60 m 2 /g) was synthesized using nitride precursor. Based on elemental analysis, XRD, electron microscopy, mass-balance based model, it shown...
The impact of the electronic resistance platinum-group-metal-free cathode catalyst layers (PGM-free CCLs) for proton-exchange-membrane fuel cells (PEMFCs) was systematically investigated. Here we selected two different PGM-free catalysts (having high and low conductivity) integrated them into CCLs without with conductive carbon fiber additives. To investigate resistivity ( <?CDATA ${\rho }_{{{\rm{e}}}^{-}}$?> <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll">...
Abstract The stability of Fe−N−C oxygen reduction reaction (ORR) electrocatalysts has been considered a primary challenge for their practical application in proton exchange membrane fuel cells (PEMFCs). While several studies have attempted to reveal the possible degradation mechanism ORR catalysts, there are few research results reporting on as well Fe species formed under different voltages real PEMFC operation. In this work, we employ in‐situ X‐ray absorption near‐edge structure (XANES)...
The solvent composition in a catalyst ink is key parameter fabricating cathode layers (CCLs) to reach high-performance proton exchange membrane fuel cells (PEMFCs). In general, an optimized (e.g., the H 2 O-to-alcohol ratio) can yield reasonably uniform and thin ionomer structures covering surface, leading better oxygen transport resistances of CCLs. 1,2 While impact on morphology or both dispersion CCLs was widely investigated, those results could vary significantly remain inconclusive...
The higher cost of PEMFC systems proves to be a major bottleneck in their adoption. Platinum being costly material (used as catalyst PEMFC) contributes significantly (42%) the overall stack. 1 majority is loaded on cathode side due slow nature oxygen reduction reaction (10 -8 A/cm 2 for ORR). Hence, alternative options catalysts are persued potential platinum metal group-free (PGM-free) improve economics such systems. sluggish kinetics PGM-free requires much thicker CCL (compared Pt...
Voltage-controlled in situ diagnostics like cyclic voltammetry (CV) are commonly used to characterize membrane electrode assemblies (MEAs) single-cell proton exchange fuel cells (PEMFCs) and monitor MEA degradation over operating time. Their application, however, is more complex for characterizing individual a PEMFC stack, depending on stack design the capability of cell test station. Consequently, several studies have demonstrated facile easily adaptable alternative by using galvanostatic...