Dramatically Enhanced Stability of Silver Passivated Dicalcium Nitride Electride: Ag-Ca2N

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Title
Dramatically Enhanced Stability of Silver Passivated Dicalcium Nitride Electride: Ag-Ca2N
Author(s)
Faseela K.P.; Ye Ji Kim; Seong-Gon Kim; Sung Wng Kim; Seunghyun Baik
Publication Date
2018-11
Journal
CHEMISTRY OF MATERIALS, v.30, no.21, pp.7803 - 7812
Publisher
AMER CHEMICAL SOC
Abstract
Electrides have received considerable attention due to their exotic properties. However, the high reactivity with oxygen and moisture immediately decomposed electrides in an ambient air environment. Here we passivated dicalcium nitride electride (Ca2N:e-) with silver via a wet chemical approach (Ag-Ca2N), significantly enhancing stability up to 17 min at room temperature in an ambient air environment. The Ca2N:e- was employed as a reducing agent due to the low work function (2.6 eV), high mobility, and high electron concentration facilitating electron transfer to Ag+ ion in an aprotic cosolvent. Moreover, the noble metal surface passivation (thickness: 55 nm) was achieved with negligible increase in work function of Ag-Ca2N (2.78 eV). The optimized molar ratio of AgNO3/Ca2N:e- was 0.5. The enhanced stability of Ag-Ca2N in organic reaction medium enabled successful aldol condensation reaction outside the glovebox, with a high ��,��-unsaturated ketone yield of 75.4%, without involving environmentally harmful strong acid or base. The enhanced stability and low work function may realize practical economic applications of Ag-Ca2N. © 2018 American Chemical Society
URI
https://pr.ibs.re.kr/handle/8788114/5042
ISSN
0897-4756
Appears in Collections:
Center for Integrated Nanostructure Physics(나노구조물리 연구단) > Journal Papers (저널논문)
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