Indirect Raman identification of the proton insertion in the high-temperature [Ba/Sr][Zr/Ti]O3-modified perovskite protonic conductors
Indirect Raman identification of the proton insertion in the high-temperature [Ba/Sr][Zr/Ti]O3-modified perovskite protonic conductors
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高温[Ba/Sr][Zr/Ti]O3修饰钙钛矿质子导体中质子插入的间接拉曼识别
DOI：
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发表时间：
2009
期刊：
影响因子：
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通讯作者：
B. Sala
中科院分区：
文献类型：
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作者：
A. Slodczyk;P. Colomban;S. Willemin;O. Lacroix;B. Sala
水合物和简单氧化物中的OH−和H3 O+物种从它们的IR、拉曼和非弹性中子的观点得到了相当好的表征。对于固态的H+（H2O）物质，已充分确定了变异性，并仍在讨论分配。孤立质子的振动特征（例如离子质子，一个质子与两个以上的受体共享其相互作用）及其动力学性质（质子气体，极化子，...）的问题是开放的。含H+的改性钙钛矿A（Ba，Sr，.）B（Zr，Ce，Ti，.）O3是用于燃料电池和中温水电解（300-800 °C）的潜在陶瓷膜。对质子化和非质子化的镧系元素/稀土改性的Ba（Sr）Zr（Ti）O3型钙钛矿以及Al改性的BaTiO 3的比较研究表明，在“质子插入”后观察到中心在2500 cm-1处的宽组分。其强度与质子种类含量以及材料的导电性相关。讨论了这一特征的混合性质：与悬挂键有关的荧光，A，B，C带或与离子质子和相关电子缺陷有关的新现象。版权所有© 2008约翰威利父子有限公司.
OH− and H3O+ species in hydrates and simple oxides are rather well characterised from their IR, Raman and inelastic neutron points of view. For the H+ (H2O) species in solid state the variability is well established and assignment remains discussed. The question of the vibrational signature of isolated proton (e.g. the ionic proton, a proton sharing its interaction with more than two acceptors) and its dynamic nature (proton gas, polaron,…) is open. H+-containing modified perovskites A(Ba,Sr,…) B(Zr,Ce,Ti,…) O3 are potential ceramic membranes for fuel cell and medium temperature water electrolysis (300–800 °C). Comparison studies of the protonated and non-protonated lanthanide/rare earth-modified perovskites of type Ba(Sr)Zr(Ti)O3 as well as Al-modified BaTiO3 show that a broad component centred at 2500 cm−1 is observed after ‘proton insertion’. Its intensity is correlated to the protonic species content as well as to the conductivity of the materials. The mixed nature of this feature is discussed: fluorescence related to the dangling bonds, A, B, C bands or new phenomena related to the ionic protons and associated electronic defect. Copyright © 2008 John Wiley & Sons, Ltd.