In situ generated 3D hierarchical Co3O4@MnO2 core-shell hybrid materials: self-assembled fabrication, morphological control and energy applications
In situ generated 3D hierarchical Co3O4@MnO2 core-shell hybrid materials: self-assembled fabrication, morphological control and energy applications
复制标题
原位生成3D分层Co3O4@MnO2核壳杂化材料：自组装制造、形态控制和能源应用
DOI：
10.1039/c8ta11487k
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发表时间：
2019-03-21
影响因子：
11.9
通讯作者：
Zhang, Suojiang
中科院分区：
文献类型：
--
作者：
Miao, Qingqing;Du, Yanyan;Zhang, Suojiang
采用简单的原位自组装方法成功制备了一系列具有独特形貌、尺寸均匀、高质量的Co3O4@MnO2核壳结构的三维有序核壳杂化材料。对Co3O4@C和Co3O4@MnO2杂化材料的中间体Co 3 O 4的形貌控制、反应过程、产物生成、煅烧过程以及形貌演变的机理进行了详细的研究和阐明。核壳结构的Co3O4@MnO2杂化材料具有良好的形貌特征、核壳结构之间的协同效应、Co3O4@C@MnO2或Co3O4@MnO2的替代产物以及促进电解质反应等优点。首次将三维分级Co3O4@MnO2核壳杂化材料用于染料敏化太阳能电池（DSSC）光电转换器件和重要固体火箭推进剂高氯酸铵（AP）分解中的两个典型钴基能源应用。该杂化材料以三维分级结构的Co 3 O 4为核，MnO 2为壳，具有上级性能和优异的催化性能。作为DSSC的替代对电极，所开发的Co3O4@MnO2核-壳混合系统表现出令人印象深刻的性能，转换效率为7.08%，与Co 3 O 4和Co3O4@C相比分别提高了26.4%和13.3%。作为AP分解的催化剂，Co_3O_4材料使AP的分解温度降低了118-143 ℃，放热提高了933-1228 J·g ~（-1）。对于Co3O4@C对应物，分解温度降低了120-131 ℃，放热增加了1254-1306 J g（-1）。Co3O4@MnO2核壳杂化材料的加入使分解温度降低了约107-112 ℃，并显着增加了放热至1311-1452 J g（-1）。据我们所知，这是第一个原位开发的3D分级Co3O4@MnO2核壳混合材料系列，用于DSSC和AP分解的能源应用。这些结果提供了一个简单而有效的策略，为设计新型的三维分层杂化材料在能源应用中的高催化活性。
A simple in situ self-assembly strategy for a novel series of highly ordered 3D hierarchical Co3O4@MnO2 core-shell hybrid materials with peculiar morphologies, uniform size and high quality has been successfully developed. The mechanisms of the morphology control, reaction process, product generation, calcining process, as well as the morphology evolution of Co3O4, the intermediates of Co3O4@C and Co3O4@MnO2 hybrid materials, have been investigated and clarified in detail. The core-shell Co3O4@MnO2 hybrid architectures have the advantages of morphological features, synergistic effects between core and shell, alternative products of Co3O4@C@MnO2 or Co3O4@MnO2, and facilitate electrolyte reactions. The 3D hierarchical Co3O4@MnO2 core-shell hybrid materials are used, for the first time, for two typical Co-based energy applications in photoelectric conversion devices of dye-sensitized solar cells (DSSCs) and the decomposition of an important solid rocket propellant, ammonium perchlorate (AP). With the 3D hierarchical Co3O4 core and ultrathin MnO2 shell, the developed hybrid materials exhibit superior performances and remarkable catalytic properties. As the alternative counter electrode of DSSCs, the developed Co3O4@MnO2 core-shell hybrid system exhibited an impressive performance with the conversion efficiency of 7.08%, which was improved by 26.4% and 13.3% as compared with the Co3O4 and Co3O4@C counterparts, respectively. As the catalyzer of AP decomposition, the Co3O4 material obviously decreased the decomposition temperatures by about 118-143 degrees C and increased the exothermic heat to 933-1228 J g(-1). For the Co3O4@C counterpart, the decomposition temperatures were decreased by 120-131 degrees C with the increased exothermic heat of 1254-1306 J g(-1). The addition of Co3O4@MnO2 core-shell hybrid materials decreased the decomposition temperatures by about 107-112 degrees C and remarkably increased the exothermic heat to 1311-1452 J g(-1). To the best of our knowledge, this is the first 3D hierarchical Co3O4@MnO2 core-shell hybrid material series developed in situ and used for the energy applications of DSSCs and AP decomposition. These results provide a simple and effective strategy for designing new types of 3D hierarchical hybrid materials towards high catalytic activity in energy applications.