In Situ NMR Study on the Interaction between LiBH4-Ca(BH4)(2) and Mesoporous Scaffolds
- Authors
- Lee, Hyun-Sook; Hwang, Son-Jong; Kim, Hoon Kee; Lee, Young-Su; Park, Jinsol; Yu, Jong-Sung; Cho, Young Whan
- Issue Date
- 18-10월-2012
- Publisher
- AMER CHEMICAL SOC
- Keywords
- Energy and Charge Transport; Energy Conversion and Storage
- Citation
- JOURNAL OF PHYSICAL CHEMISTRY LETTERS, v.3, no.20, pp.2922 - 2927
- Indexed
- SCIE
SCOPUS
- Journal Title
- JOURNAL OF PHYSICAL CHEMISTRY LETTERS
- Volume
- 3
- Number
- 20
- Start Page
- 2922
- End Page
- 2927
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/107205
- DOI
- 10.1021/jz301199y
- ISSN
- 1948-7185
- Abstract
- We discuss the use of nuclear magnetic resonance (NMR) spectroscopy to investigate the physical state of the eutectic composition of LiBH4-Ca(BH4)(2) (LC) infiltrated into mesoporous scaffolds and the interface effect of various scaffolds. Eutectic melting and the melt infiltration of mixed borohydrides were observed through in situ NMR. In situ and ex situ NMR results for LC mixed with mesoporous scaffolds indicate that LiBH4 and Ca(BH4)(2) exist as an amorphous mixture inside of the pores after infiltration. Surprisingly, the confinement of the eutectic LC mixture within the mesopores is initiated below the melting temperature, which indicates a certain interaction between the borohydrides and the mesoporous scaffolds. The confined borohydrides remain inside of the pores after cooling. These phenomena were not observed in microporous or nonporous materials, and this observation highlights the importance of the pore structure of the scaffolds. Such surface interactions may be associated with a faster dehydrogenation of the nanoconfined borohydrides.
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