Maximilian Wagner

University of Leipzig · Wilhelm Ostwald Institut of Physical and Theoretical Chemistry

In the present article, electrodes containing a composite of platinum on top of a plasma-oxidized multi-layer graphene film are investigated as model electrodes that combine an exceptional high platinum utilization with high electrode stability. Graphene is thereby acting as a separator between the phosphate-based electrolyte and the platinum catal...

Solid acid fuel cells operate at intermediate temperatures utilizing a solid electrolyte (CsH2PO4, CDP). However, relatively little is known about the degradation mechanism and the topic is rarely addressed. Phosphate...

Reliable, stable, and long-term performance is one of the most important requirements for fuel cells in general. Widespread application of intermediate temperature solid acid fuel cells is still hindered by...

Electrodes are currently the primary performance-limiting component in low and intermediate temperature fuel cells. A proven method for improving electrode performance in solid acid fuel cells is to create ever finer nanostructures and thus increase the electrochemically-active surface area. However, this performance enhancement is limited by issue...

Low electrode impedance paired with low catalyst loading in intermediate and low temperature fuel cells is extremely difficult to achieve, posing a major obstacle to commercialization. Here we demonstrate a scalable and facile route to obtain nanostructured composite solid acid fuel cell electrodes consisting of Pt decorated carbon nanotubes and Cs...

The stepwise pseudomorphic transformation of silica gel and porous glass into MCM-41 (Mobil Composition of Matter No. 41) has been investigated for the first time with hyperpolarized 129Xe NMR. The changes in structure were followed by changes in the line shape and chemical shift of the 129Xe NMR signals, whereas Variable Temperature (VT)-NMR and s...

There is growing concern that nanoparticles (NPs) may accelerate amyloid protein aggregation and thus cause amyloid-related diseases. Here, the potential of silver and gold NPs is explored (diameter 20 nm) on the aggregation of the amyloid peptide sequences NNFGAIL from human islet amyloid polypeptide and the yeast prion protein sequence GNNQQNY, w...

Spray drying was explored as a new CsH2PO4 nanoparticle synthesis method and a systematic parameter study was conducted to discover the set leading to optimal deposition rate and particle size distribution for applications in solid acid fuel cell electrodes. The nanoparticles were deposited directly onto either a carbon paper current collector or a...