Performance of a DMFC Using Pt-Ru/C Catalysts Prepared by Reduction with Formic Acid

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)In this work Pt-Ru/C catalysts are prepared in different atomic ratios by reduction with formic acid and submitted to thermal treatment in a hydrogen atmosphere. Physical characterisation of the materials by XRD, EDX, and TEM shows that the particle site increases as a consequence of the thermal treatments and this effect is relevant in the electrochemical behaviour of these materials in a DMFC. Finally, the performance of the DMFC with different flow fields is examined.241732159165Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)FAPESP [98/12922-8).

Synchrotron X-Ray-Based Functional and Anatomical Lung Imaging Techniques

Lung diseases are a major burden of public health especially in developed countries and therefore continue to be an active interest in preclinical and clinical research. Due to the complex structure and motion of the lung, an in vivo or in situ analysis would be very beneficial. However, this is very challenging for virtually all imaging technologies in small animal models of lung disease due to the small size of the organ and its rapid breathing motion. To study lung disease in detail, the interaction of molecular events, anatomical alterations, and changes in the lung function need to be assessed in parallel. The use of synchrotron light sources has enabled the development of several lung imaging techniques such as phase-contrast CT, 4D lung imaging, virtual histology of lung tissue, k-edge subtraction imaging for measuring regional lung ventilation and perfusion, as well as speckle-based airflow measurements. The application of these techniques has allowed to gain more insight into anatomical alterations as well as functional parameters in small animal lung disease models, which will be demonstrated in this chapter