By a News Reporter-Staff News Editor at Life Science Weekly -- Data detailed on Biochemistry have been presented. According to news reporting originating from Berlin, Germany, by NewsRx correspondents, research stated, "Thermal annealing is an important and widely adopted step during the synthesis of Pt bimetallic fuel-cell catalysts, although it faces the inevitable drawback of particle sintering. Understanding this sintering mechanism is important for the future development of highly active and robust fuel-cell catalysts."
Our news editors obtained a quote from the research from Technical University, "Herein, we studied the particle sintering during the thermal annealing of carbon-supported Pt1-xNix (PtNi, PtNi3, and PtNi5) nanoparticles, a reported recently class of highly active fuel-cell catalysts. By using high-resolution transmission electron microscopy, we found that annealing at an intermediate temperature (400 degrees C) effectively increased the extent of alloying without particle sintering; however, high-temperature annealing (800 degrees C) caused severe particle sintering, which, unexpectedly, was strongly dependent on the composition of the alloy, thus showing that a higher Ni content resulted in a higher extent of particle sintering. This result can be ascribed to the solid-state transformation of the carbon support into graphene layers, catalyzed by Ni-richer catalyst, which, in turn, promoted particle migration/coalescence and, hence, more-significant sintering."
According to the news editors, the research concluded: "Therefore, our results provide important insight for the synthesis of carbon-supported Pt-alloy fuel-cell catalysts."
For more information on this research see: Ni-Catalyzed Growth of Graphene Layers during Thermal Annealing: Implications for the Synthesis of Carbon-Supported PtNi Fuel-Cell Catalysts. Chemcatchem, 2013;5(9):2691-2694. Chemcatchem can be contacted at: Wiley-V C H Verlag Gmbh, Boschstrasse 12, D-69469 Weinheim, Germany. (Wiley-Blackwell - www.wiley.com/; Chemcatchem - onlinelibrary.wiley.com/journal/10.1002/(ISSN)1867-3899)
The news editors report that additional information may be obtained by contacting L. Gan, Technical University of Berlin, Electrochem Energy Catalysis & Mat Sci Lab, Inst Chem, Berlin, Germany. Additional authors for this research include S. Rudi, C.H. Cui and P. Strasser (see also Biochemistry).
Keywords for this news article include: Berlin, Europe, Germany, Biochemistry
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