Journal
CHEMISTRY OF MATERIALS
Volume 26, Issue 3, Pages 1385-1392Publisher
AMER CHEMICAL SOC
DOI: 10.1021/cm403161e
Keywords
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Funding
- U.S. Department of Energy, Office of Basic Energy Sciences [DE-SC0002576]
- Ministry of National Education of Turkey
- Altria
- U.S. Department of Energy (DOE) [DE-SC0002576] Funding Source: U.S. Department of Energy (DOE)
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A new facile method for synthesis of porous azo-linked polymers (ALPs) is reported. The synthesis of ALPs was accomplished by homocoupling of aniline-like building units in the presence of copper(1) bromide and pyridine. The resulting ALPs exhibit high surface areas (SA(BET) = 862-1235 m(2) g(-1)), high physiochemical stability, and considerable gas storage capacity especially at high-pressure settings. Under low pressure conditions, ALPs have remarkable CO2 uptake (up to 5.37 mmol g(-1) at 273 K and 1 bar), as well as moderate CO2/N-2 (29-43) and CO2/CH4 (6-8) selectivity. Low pressure gas uptake experiments were used to calculate the binding affinities. of small gas molecules and revealed that ALPs have high heats of adsorption for hydrogen (7.5-8 kJ mol(-1)), methane (18-21 kJ mol(-1)), and carbon dioxide (28-30 kJ mol(-1)). Under high pressure conditions, the best performing polymer, ALP-1, stores significant amounts of H-2 (24 g L-1, 77 K/70 bar), CH4 (67 g L-1, 298 K/70 bar), and CO2 (304 g L-1, 298 K/40 bar).
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