2013年12月
Dynamic Breathing of CO2 by Hydrotalcite
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
- 巻
- 135
- 号
- 48
- 開始ページ
- 18040
- 終了ページ
- 18043
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1021/ja4099752
- 出版者・発行元
- AMER CHEMICAL SOC
The carbon cycle of carbonate solids (e.g., limestone) involves weathering and metamorphic events, which usually occur over millions of years. Here we show that carbonate anion intercalated layered double hydroxide (LDH), a class of hydrotalcite, undergoes an ultrarapid carbon cycle with uptake of atmospheric CO2 under ambient conditions. The use of C-13-labeling enabled monitoring by IR spectroscopy of the dynamic exchange between initially intercalated C-13-labeled carbonate anions and carbonate anions derived from atmospheric CO2. Exchange is promoted by conditions of low humidity with a half-life of exchange of similar to 24 h. Since hydrotalcite-like clay minerals exist in Nature, our finding implies that the global carbon cycle involving exchange between lithosphere and atmosphere is much more dynamic than previously thought.
- リンク情報
- ID情報
-
- DOI : 10.1021/ja4099752
- ISSN : 0002-7863
- Web of Science ID : WOS:000328100000009