Cation Extraction Process in Bilayer Cyanide Film as Investigated by Depth-Resolved X-ray Absorption Spectroscopy
Cation Extraction Process in Bilayer Cyanide Film as Investigated by Depth-Resolved X-ray Absorption Spectroscopy
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深度分辨 X 射线吸收光谱研究双层氰化物膜中的阳离子萃取过程
DOI：
10.1143/jjap.50.125802
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发表时间：
2011
影响因子：
1.5
通讯作者：
Yutaka Moritomo
中科院分区：
文献类型：
--
作者：
Ayako Omura;Yutaro Kurihara;Tomoyuki Matsuda;Hajime Tanida;Tomoya Uruga;Yutaka Moritomo
用深度分辨X射线吸收光谱研究了外延界面为Na0.84-yCo2+[Fey3+Fe1-y2+(CN)6]0.71 3.8H2O(NCF71)/Na1.60-x(Cox3+Co1-x2+)[Fe2+(CN)6]0.90 2.8H2O(NCF90)的双层氰化物薄膜的阳离子萃取过程。假定Co3+和Fe3+的阶跃深度(Z)分布，我们估算了各离子相对于阳离子萃取量(δav)的阶跃深度dCo和dFe以及浓度δCo和δFe。在NCF90表层，Na+提取占主导地位，这与NCF90层较低的氧化还原电位一致。我们发现dFe(∼6 0 0 nm)比NCF71/NCF90界面的实际深度(d=2 0 0 nm)要深得多，并用界面附近的氧化还原相互作用解释了这一行为。
The cation extraction process in the bilayer cyanide film with an epitaxial interface, Na 0.84-y Co 2+[Fe y 3+ Fe 1-y 2+(CN) 6] 0.71 3.8 H 2 O (NCF71)/Na 1.60-x (Co x 3+ Co 1-x 2+)[Fe 2+(CN) 6] 0.90 2.8 H 2 O (NCF90), was investigated by depth-resolved X-ray absorption spectroscopy. Assuming stepwise depth (z) distributions of Co 3+ and Fe 3+, we estimated the step depths, d Co and d Fe, and concentrations, δ Co and δ Fe, of the respective ions against the average quantity (δ av) of cation extraction. The Na+ extraction was found to be dominant in the NCF90 surface layer, consistent with the lower redox potential in the NCF90 layer. We found that the magnitude of d Fe (∼ 600 nm) is much deeper than the actual depth (d= 200 nm) of the NCF71/NCF90 interface, and interpreted the behavior in terms of the redox interaction in the vicinity of the interface.