Facet-dependent catalytic activity of platinum nanocrystals for triiodide reduction in dye-sensitized solar cells.
Facet-dependent catalytic activity of platinum nanocrystals for triiodide reduction in dye-sensitized solar cells.
复制标题
染料敏化太阳能电池中铂纳米晶体对三碘化物还原的面依赖性催化活性
DOI：
10.1038/srep01836
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发表时间：
2013
影响因子：
4.6
通讯作者：
Yang, Hua Gui
中科院分区：
文献类型：
--
作者：
Zhang, Bo;Wang, Dong;Hou, Yu;Yang, Shuang;Yang, Xiao Hua;Zhong, Ju Hua;Liu, Jian;Wang, Hai Feng;Hu, P.;Zhao, Hui Jun;Yang, Hua Gui
铂（Pt）纳米晶体在许多非均相催化过程中是一种有效的催化剂。然而，在不同的反应体系中，具有最高活性的前驱面有不同的报道。虽然Pt一直是染料敏化太阳能电池（dsc）最重要的对电极材料，但在裸露的Pt晶体表面上的原子排列是否适合还原三碘化物仍是一个谜。利用密度泛函理论研究了三碘化物在{100}、{111}和{411}上的催化还原反应过程，表明其活度为Pt(111) > Pt(411) > Pt（100）。进一步合成了以{100}、{111}和{411}为界面的铂纳米晶体，并将其作为dsc的对电极材料。Pt（111）在dsc中的最高光伏转换效率证实了理论研究的预测。这些发现加深了对Pt表面三碘化物还原机制的理解，并进一步成功筛选了dsc的最佳面。
Platinum (Pt) nanocrystals have demonstrated to be an effective catalyst in many heterogeneous catalytic processes. However, pioneer facets with highest activity have been reported differently for various reaction systems. Although Pt has been the most important counter electrode material for dye-sensitized solar cells (DSCs), suitable atomic arrangement on the exposed crystal facet of Pt for triiodide reduction is still inexplicable. Using density functional theory, we have investigated the catalytic reaction processes of triiodide reduction over {100}, {111} and {411} facets, indicating that the activity follows the order of Pt(111) > Pt(411) > Pt(100). Further, Pt nanocrystals mainly bounded by {100}, {111} and {411} facets were synthesized and used as counter electrode materials for DSCs. The highest photovoltaic conversion efficiency of Pt(111) in DSCs confirms the predictions of the theoretical study. These findings have deepened the understanding of the mechanism of triiodide reduction at Pt surfaces and further screened the best facet for DSCs successfully.
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影响因子：
16.6
作者：
Li, Guo-ran;Wang, Feng;Shen, Pan-wen
通讯作者：
Shen, Pan-wen
影响因子：
4.6
作者：
Hao, Feng;Dong, Pei;Zhang, Jing;Zhang, Yongchang;Loya, Phillip E.;Hauge, Robert H.;Li, Jianbao;Lou, Jun;Lin, Hong
通讯作者：
Lin, Hong
影响因子：
3.7
作者：
Fabregat-Santiago, Francisco;Bisquert, Juan;Gratzel, Michael
通讯作者：
Gratzel, Michael
影响因子：
3.7
作者：
Kresse, G;Furthmuller, J
通讯作者：
Furthmuller, J
合理筛选染料敏化太阳能电池低成本对电极
影响因子：
16.6
作者：
Hou, Yu;Wang, Dong;Yang, Hua Gui
通讯作者：
Yang, Hua Gui