Morphology-Tuned Synthesis of Nickel Cobalt Selenides as Highly Efficient Pt-Free Counter Electrode Catalysts for Dye-Sensitized Solar Cells
Morphology-Tuned Synthesis of Nickel Cobalt Selenides as Highly Efficient Pt-Free Counter Electrode Catalysts for Dye-Sensitized Solar Cells
复制标题
形态调整合成镍钴硒化物作为染料敏化太阳能电池的高效无铂对电极催化剂
DOI：
10.1021/acsami.6b09966
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发表时间：
2016-11-02
影响因子：
9.5
通讯作者：
Hou, Linxi
中科院分区：
文献类型：
--
作者：
Qian, Xing;Li, Hongmei;Hou, Linxi
本工作通过简单的前驱体转化法合成了不同Ni/Co摩尔比的形貌可调的三元Ni20钴硒化合物，并将其用作染料敏化太阳能电池的对电极材料。实验事实和机理分析阐明了产物可能的生长过程。结果表明，通过调节Ni/Co摩尔比可以优化三元镍钴硒化合物的电化学性能和结构。在所制备的金属硒化合物中，由于其独特的形貌和可调的组成，电化学测试表明，三元镍钴硒化合物表现出比二元镍和钴硒化合物更好的电催化活性。其中，三维蒲公英状Ni0.33Co0.67Se微球在AM 1.5G辐照下的功率转换效率(9.01%)远高于铂催化剂(8.30%)。
In this work, morphology-tuned ternary nickel 20 cobalt selenides based on different Ni/Co molar ratios have been synthesized via a simple precursor conversion method and used as counter electrode (CE) materials for dye-sensitized solar cells (DSSCs). The experimental facts and mechanism analysis clarified the possible growth process of product. It can be found that the electrochemical performance and structures of ternary nickel cobalt selenides can be optimized by tuning the Ni/Co molar ratio. Benefiting from the unique morphology and tunable composition, among the as-prepared metal selenides, the electrochemical measurements showed that the ternary nickel cobalt selenides exhibited a more superior electrocatalytic activity in comparison with binary Ni and Co selenides. In particular, the three-dimensional dandelion-like Ni0.33Co0.67Se microspheres delivered much higher power conversion efficiency (9.01%) than that of Pt catalyst (8.30%) under AM 1.5G irradiation.