“…Since transportation represents a significant portion of world energy consumption and contributes considerably to atmospheric pollution, the development of an appropriate fuel cell system is an important issue from both economical and environmental points of view (Arico et al, 2001). Direct methanol fuel cells (DMFCs) are an attractive portable power source owing to their high energy density, easy fuel handling, and a low operating temperature (Arico at al., 2000;Chen & Tang, 2002;Ren et al, 2000;Witham at al., 2003). However, DMFCs entail some serious technical obstacles.…”