Dynamic breathing of co2 by hydrotalcite

Shinsuke Ishihara, Pathik Sahoo, Kenzo Deguchi, Shinobu Ohki, Masataka Tansho, Tadashi Shimizu, Jan Labuta, Jonathan P. Hill, Katsuhiko Ariga, Ken Watanabe, Yusuke Yamauchi, Shigeru Suehara, Nobuo Iyi

研究成果: Contribution to journalArticle査読

50 被引用数 (Scopus)


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 13C-labeling enabled monitoring by IR spectroscopy of the dynamic exchange between initially intercalated 13C-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 ∼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.

ジャーナルJournal of the American Chemical Society
出版ステータス出版済み - 12 4 2013

All Science Journal Classification (ASJC) codes

  • Catalysis
  • Chemistry(all)
  • Biochemistry
  • Colloid and Surface Chemistry

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