Honeycomb-like bio-based carbon framework decorated with ternary tantalum-based compounds as efficient and durable electrocatalysts for triiodide reduction reaction
Honeycomb-like bio-based carbon framework decorated with ternary tantalum-based compounds as efficient and durable electrocatalysts for triiodide reduction reaction
复制标题
三元钽基化合物修饰的蜂窝状生物基碳框架作为高效耐用的三碘化物还原反应电催化剂
DOI：
10.1002/er.5495
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发表时间：
2020
影响因子：
4.6
通讯作者：
Li Jingwen
中科院分区：
文献类型：
--
作者：
Qiao Xinying;Yun Sining;Han Feng;Zhang Yongwei;Arshad Asim;Chidambaram Brundha;Wang Ziqi;Zafar Nosheen;Si Yiming;Li Jingwen
寻找一种廉价有效的清洁能源电催化剂对新一代光伏器件具有十分重要的意义。在此，我们报告了一种简单而通用的原位共沉淀策略，将三种新型钽基化合物（NiTa2O6， MnTa2O6和alta4）装载在蜂窝状生物基碳（HBC）框架上。HBC骨架具有独特的蜂窝状网络结构，可作为纳米杂化物的支撑材料，为三碘化物还原反应提供丰富的表面活性位点和快速的电子传递通道。由于纳米杂化材料充分利用了不同组分的协同效应，因此广泛使用丰富的生物质衍生碳制成钽基化合物显著提高了纳米杂化材料的电催化性能，并表现出强大的耐腐蚀性。采用NiTa2O6/HBC、MnTa2O6/HBC和AlTaO4/HBC对电极催化剂制备的光伏器件的功率转换效率（PCE）分别为7.09%、7.39%和7.86%，优于铂基电池（6.80%）。这项工作为进一步合理设计高效、廉价和耐用的电催化剂提供了一种策略，用于先进的能源技术应用。
Finding an inexpensive and effective clean energy electrocatalyst is highly important for the new generation of photovoltaic devices. Herein, we report a facile and universal in situ co‐precipitation strategy to load three novel tantalum‐based compounds (NiTa2O6, MnTa2O6, and AlTaO4) on honeycomb‐like bio‐based carbon (HBC) frameworks. The HBC framework with unique honeycomb‐like network structure serves as a support material in nanohybrids that can provide rich surface active sites and rapid electron transport channels for triiodide reduction reaction. The adoption of widely available and abundant biomass‐derived carbon into tantalum‐based compounds markedly boosts electrocatalytic properties of nanohybrids and exhibits robust corrosion resistance because nanohybrids adequately utilize the synergistic effects of different components. The photovoltaic devices fabricated with NiTa2O6/HBC, MnTa2O6/HBC, and AlTaO4/HBC counter electrode catalysts demonstrate the brilliant power conversion efficiency (PCE) of 7.09%, 7.39%, and 7.86%, respectively, outperforming the Pt‐based cells (6.80%). This work offers a strategy for the further rational design of efficient, inexpensive, and durable electrocatalysts for advanced energy technology applications.