forming element or an oxide thereof, characterised in that the Pt--M alloy is in intimate contact with Y, and provided that M is not Ru if Y is WOis disclosed and which may be used as a poison tolerant catalyst for use in fuel cells, specifically as the anode of a PEM fuel cell....
which provides multiphase material transfer microchannel and electrochemical reaction site for PEMFC. To achieve fuel cell utilization, MEA with high power density, low platinum load and good durability is required. In MEA, in addition to the catalyst, the structure of each functional layer ...
The platinum or platinum-alloy catalyst used in PEM fuel cell anodes is highly susceptible to impurities such as CO and sulfur compounds. It only takes a very small amount (ppm or ppb levels) of any impurity to have a dramatic impact on the catalyst, resulting in a significant performance ...
To mitigate these effects, partial embedding34 and sectioning in ultramicrotomy were used in the following. Structure of catalyst layers To gain insights into the morphology of a typical proton-exchange membrane fuel cell cathode, we studied a catalyst layer with 19.8 wt% platinum supported on...
The catalyst material is the key component in a PEM fuel cell. It facilitates the reaction of oxygen and hydrogen. Usually, commercial PEM fuel cells use Pt nanoparticles as catalyst, but these catalysts may suffer from poor durability. Electrospinning has been used to develop new catalysts with...
Modeling is increasingly widely used to optimization, improvement and cost reduction efforts of the fuel cell technology. Although there are many computational models in literature that describe the behavior of Polymer Electrolyte Membrane (PEM) fuel cell, there is a only few models that simulates ...
and observed changes in ionomer morphology that affected the proton conductivity in simulations and the cell performance in experiments. Images that resolved voxels of\(16~\text{nm}^3\)were used to run simulations of proton transport, partially resolving the fine structure of agglomerates and thin ...
devices with high efficiency and low to zero emissions. Such power sources can be used in ...
Such effects are also evident in the change in the catalyst activity upon the alloying of Pt with another metal, where the structure of the catalyst changes. Activities of various catalysts researched and used in PEM fuel cells, such as commercial Pt/C, de-alloyed PtxCuy/C and PtxCoy/C, ...
Pt/C catalysts have been synthesized by a novel low-temperature plasma method which consists in treating in one step a mixture of a solid metallic precursor and carbon support. The method was used to prepare highly loaded Pt/carbon black catalysts designed for PEM fuel cell applications. Various...