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http://dx.doi.org/10.5714/CL.2011.12.2.112

Influence of phosphoric acid treatment on hydrogen adsorption behaviors of activated carbons  

Yoo, Hye-Min (Department of Chemistry, Inha University)
Lee, Seul-Yi (Department of Chemistry, Inha University)
Kim, Byung-Joo (Smart Composite Material Research Team, Carbon Valley R&D Division, Jeonju Institute of Machinery and Carbon Composites)
Park, Soo-Jin (Department of Chemistry, Inha University)
Publication Information
Carbon letters / v.12, no.2, 2011 , pp. 112-115 More about this Journal
Abstract
The scope of this work investigates the relationship between the amount of oxygen-functional groups and hydrogen adsorption capacity with different concentrations of phosphoric acid. The amount of oxygen-functional groups of activated carbons (ACs) is characterized by X-ray photoelectron spectroscopy. The effects of chemical treatments on the pore structures of ACs are investigated by $N_2$/77 K adsorption isotherms. The hydrogen adsorption capacity is measured by $H_2$ isothermal adsorption at 298 K and 100 bar. In the results, the specific surface area and pore volume slightly decreased with the chemical treatments due to the pore collapsing behaviors, but the hydrogen storage capacity was increased by the oxygen-functional group characteristics of AC surfaces, resulting from enhanced electron acceptor-donor interaction at interfaces.
Keywords
hydrogen storage; activated carbon; chemical treatments;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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