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Orientation Dependence of Photochemical Reduction Reactions on SrTiO_3 Surfaces

机译：SrTiO_3表面上光化学还原反应的取向依赖性

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摘要

Polished and annealed surfaces of randomly oriented crystallites were used to study the orientation dependence of the photochemical activity of SrTiO_3 surfaces. Silver cations reduced from an aqueous solution produce solid silver metal at the reaction site. The amounts of silver produced by a fixed exposure were used as a relative measure of each grain's activity. The surface structure of the grains was observed using atomic force microscopy and the surface orientation of each grain was determined by electron backscattered diffraction. Surfaces annealed in air for 6h at 1200℃ were bound by some combination of the following three planes: {110}, {111}, and a complex facet inclined approximately 24° from {100}. By correlating the orientations of individual grains to the amount of deposited silver, we conclude that surfaces with the complex {100} facet are the most active.
机译：随机取向的微晶的抛光和退火表面被用来研究SrTiO_3表面光化学活性的取向依赖性。从水溶液中还原的银阳离子在反应位点产生固体银金属。通过固定曝光产生的银量用作每种谷物活性的相对量度。使用原子力显微镜观察晶粒的表面结构，并通过电子背散射衍射确定每个晶粒的表面取向。在1200℃的空气中退火6h的表面被以下三个平面的某种结合束缚：{110}，{111}和一个与{100}倾斜约24°的复平面。通过将单个晶粒的方向与沉积的银量相关联，我们得出结论，具有复杂{100}刻面的表面是最活跃的。

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