Dataset Information

Dataset of xerogel synthesis in basic medium at different resorcinol/catalyst ratios.

ABSTRACT: Textural properties of carbon xerogels and their applications depend on the path of synthesis. The variables to be considered are the starting reagents, relation and the catalysis medium used. Here we present a dataset for a series of carbon xerogels obtained by the polymerization of resorcinol-formaldehyde (R/F) at different resorcinol/Na2CO3 (C) ratios (R/C). To examine the effect R/C ratio on the morphology and surface chemistry of the xerogels, N2 isotherms at 77K, XRD, FTIR were measure as well as of immersion calorimetry measurements were taken in water and benzene; point zero charge (pzc) were also determined. These results are reported here.

SUBMITTER: Fonseca-Correa RA

PROVIDER: S-EPMC5988453 | biostudies-literature | 2018 Apr

REPOSITORIES: biostudies-literature

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Dataset of xerogel synthesis in basic medium at different resorcinol/catalyst ratios.

Fonseca-Correa Rafael A RA Giraldo Liliana L Moreno-Piraján Juan Carlos JC

Data in brief 20180215

Textural properties of carbon xerogels and their applications depend on the path of synthesis. The variables to be considered are the starting reagents, relation and the catalysis medium used. Here we present a dataset for a series of carbon xerogels obtained by the polymerization of resorcinol-formaldehyde (R/F) at different resorcinol/Na2CO3 (C) ratios (R/C). To examine the effect R/C ratio on the morphology and surface chemistry of the xerogels, N2 isotherms a ...[more]

PMID: 29876461

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Project description:The cluster structure in the catalyst ink of a proton exchange membrane fuel cell determines its performance. The interaction among solvent, ionomer, and catalyst in ink determines the cluster structure and affects the microstructure and surface morphology of the catalyst layer, which is of great significance to improve the conductivity of the catalyst layer to protons, electrons, and water. First, the dissolved state of the main chain and the side chain of the ionomer in solvent was characterized. The results of relative viscosity, ζ-potential, effective proton fraction, and nuclear magnetic resonance (NMR) showed that the alcohol aqueous solution promoted the stretching electrolysis of the main chain and the side chain of the ionomer more than the pure aqueous solvent, making the ionomer clusters smaller. The rheological test of the ink shows that the pure water solvent ink has the largest cluster and the strongest network structure. Under the test conditions, the clusters in the ink can be reconstructed quickly after breakage through viscous shearing. The addition of alcohols will make the clusters in the ink smaller and the network structure brittle. After the clusters and the network structure are damaged, they will slowly recombine and the viscosity in the ink will gradually recover. Ethanol will minimize the clusters in the ink, and the network structure in the ink is the weakest. The effect of the network strength on the cluster structure is weakened by reducing the solid content in the ink. The amplitude scanning test shows that the network structure in the slurry is almost eliminated after reducing the solid content, the storage modulus of ink with water, 50 wt % isopropyl alcohol (IPA), 50 wt % n-propanol (NPA), and 50 wt % ethanol (ET) decreases in turn, as well as the liquid viscosity behavior increases and the cluster particle size in the ink decreases. In conclusion, more dispersed ionomers and alcohol molecules with smaller molecular structures are more conducive to the dispersion of clusters in the ink.

Dataset Information

Dataset of xerogel synthesis in basic medium at different resorcinol/catalyst ratios.

Publications

Dataset of xerogel synthesis in basic medium at different resorcinol/catalyst ratios.

Similar Datasets

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