Carbon cryogel

Figure 2. Pore size distributions of (a) carbon cryogels, (b) carbon xerogels and (c) carbon MW gels synthesized under the condition of R/C = 200.

Fig. 45. Pore size distribution of organic oryogels prepared with different fictors and of carbon cryogels prepared from the corresponding organic cryogels at 1273 K. Courtesy of Prof. H. Tamon of...

Following the analysis of carbon pore size effect on fuel cell performance, Arbizzani et al. [47] reported DMFC tests for PtRu oti mesoporous carbon cryogels. They achieved the best results for the catalyst supported on mesoporous carbon with pore size distribution around 20 nm in diameter. Again, the high surface area is sacrificed to improve the access of the perfluorosulfonate ionomer through the carbon support having bigger pores sizes. 

Sepehri S, Garcia BB, Zhang Q, Cao G (2009) Enhanced electrochemical and structural properties of carbon cryogels by surface chemistry alteration with boron and nitrogen. Caibon 47 1436-1443... 

Keywords Freeze-drying synthesis Co-precipitation Nanoparticle isolation Oriented porosity Carbon cryogel... 

The most conmum synthesis technique for carbon cryogels from polymer precursors is based on their thermal processing in a non-oxidizing atmosphere, usually argOTi or nitrogen, at 800-1,000 °C. The polymer precursor is mainly synthesized by... 

Recently, carbon aerogels and carbon cryogel have attracted a great deal of attention as new mesoporous supports of electrocatalysts for the HOR in PEM fuel cells, due to their advanced characteristics such as a tortuous open-cell structure, ultrafine particle and pore size, and high specific surface area [84—86]. Their unique microstructure originates from their wet-chemical preparation by the solution sol-gel method and their subsequent solvent removal via supercritical- or freeze-drying. Despite their superior properties as catalyst supports, their very... 

Babic BM, Vracar Lj M, Radmilovic V, Krstajic NV. Carbon cryogel as support of platinum nano-sized electrocatalyst for the hydrogen oxidation reaction. Electrochim Acta2006 51(18) 3820-6. 

---