... for accelerated lifetime testing. 04 09 2009 07 01 2011 16 06 2011 16 06 2011 life testing proton exchange membrane fuel cells scanning electron microscopy transmission electron microscopy X-ray diffraction proton exchange membrane (PEM) fuel cells accelerated lifetime...

... was prepared by coprecipitation method. Ni based electrode was used to fabricate the cell by dry pressing technique. The crystal structure and surface morphology were characterized by an X-ray diffractometer, scanning electron microscopy (SEM), and high resolution transmission electron microscopy (TEM...

... phenomenon in water was found for the membrane. From the results of water uptake and the microstructure analyses using transmission electron microscopy (TEM) on different sulfonated levels, it was found that the number of water clusters in SPIX-EP40 membranes increased as the increasing water uptake...

... been carried out using X-ray powder diffraction, scanning electron microscopy, transmission electron microscopy, high resolution transmission electron microscopy (HRTEM), Raman spectroscopy, and Fourier transform infrared spectroscopy (FTIR) spectroscopy. Pt-supported MWNTs (Pt/MWNTs) have been...

... electron microscopy decomposition cerium compounds gadolinium compounds lanthanum compounds strontium compounds cobalt compounds 30 11 2005 01 03 2006 2006 American Society of Mechanical Engineers ...

..., transmission electron microscopy, x-ray diffractometry, and x-ray photoelectron spectroscopy. Electrochemical characterization of the electrocatalysts was done in acidic and alkaline media using cyclic voltammetry and potentiodynamic polarization techniques. These tests were performed at room and higher...