Proton conductibility material, sulfonic amorphous carbon and preparation method thereof
A proton-conductive, amorphous carbon technology, used in fuel cell components, fuel cells, carbon-silicon compound conductors, etc., can solve the problems of poor heat resistance and high price of solid acid catalysts, and achieve excellent chemical stability.
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Embodiment 1
[0073] [Example 1] Production of amorphous carbon with sulfonic acid groups introduced from naphthalene
[0074] 20 g of naphthalene was added to 300 ml of concentrated sulfuric acid (96%), heated at 250° C. for 15 hours, and then excess concentrated sulfuric acid was removed by distillation under reduced pressure at 250° C. to obtain a black powder. The black powder was washed with 300 ml of distilled water, and this operation was repeated until the sulfuric acid in the washed distilled water reached the detection limit of the elemental analysis or less, and amorphous carbon having introduced sulfonic acid groups was obtained.
[0075] A disk with a thickness of 0.7 mm and a diameter of 10 mm was produced by press-molding the powder of amorphous carbon with sulfonic acid groups introduced, and platinum was vapor-deposited on one surface of the disk, and the proton conductivity was measured by the above-mentioned AC impedance method. . It was confirmed that the proton conduct...
Embodiment 2
[0076] [Example 2] Production of amorphous carbon with sulfonic acid groups introduced from coronene
[0077] 5g coronene (C 24 h 12 ) into 100ml of concentrated sulfuric acid (96%), heated at 250°C for 15 hours, and then removed excess concentrated sulfuric acid by distillation under reduced pressure at 280°C to obtain a black powder. The black powder was washed with 300 ml of distilled water, and this operation was repeated until the sulfuric acid in the washed distilled water reached the detection limit of elemental analysis or below, thereby obtaining amorphous carbon into which a sulfonic acid group was introduced.
[0078] By press-molding the amorphous carbon powder into which a sulfonic acid residue was introduced, a disc with a thickness of 0.7 mm and a diameter of 10 mm was produced, platinum was vapor-deposited on one surface of the disc, and then measured by the above-mentioned AC impedance method proton conductivity. It was confirmed that the proton conductivit...
Embodiment 3
[0079] [Example 3] Production of amorphous carbon with sulfonic acid groups introduced from heavy oil
[0080] 10 g of heavy oil was added to 300 ml of concentrated sulfuric acid (96%), heated at 250° C. for 15 hours, and then excess concentrated sulfuric acid was removed by distillation under reduced pressure at 250° C. to obtain a black powder. The black powder was washed with 300 ml of distilled water, and this operation was repeated until the sulfuric acid in the washed distilled water reached the detection limit of the elemental analysis or less, and amorphous carbon having introduced sulfonic acid groups was obtained.
[0081] A disc with a thickness of 0.7 mm and a diameter of 10 mm was manufactured by press-molding the powder of amorphous carbon into which a sulfonic acid residue was introduced. Platinum was vapor-deposited on one surface of the disc, and the proton conduction was measured by the above-mentioned AC impedance method. Rate. It was confirmed that the pro...
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