微生物燃料电池钨/钼氧化物多孔阵列支撑非铂双功能催化剂的构筑及活性研究

Microbial fuel cell is attrative because it uses waste organic compounds to generate electricity. However, the power output of currently available microbial fuel cells is low. Based on our priliminary investigations, we are going to fabricate dually functional catalyst to improve the power output of microbial fuel cell in this project.Following work will be done: prepare pore-arrayed Mo/W oxides with template; fabricate platinum-free catalysts via partial carbonization of the resulting oxides; characterize the composition, structure and surface morphology and investigate the bio-compatibility and electrocatalytic activity of the fabricated catalysts; evaluate the effectivity of the catalysts in microbial fuel cell. With these efforts, the dependence of bio-compatibility and electrocatlytic activity of the catalysts on their composition, strucutre and surface morphology is expected to be illustrated and the fabrication of novel catalysts based on Mo/W carbides as primary and Mo/W oxide as secondary catalysts will be established. The pore-arrayed oxides porvide bio-compatibility and enhance the electricity generation ability via biofilm, while the carbides with the assitance of the oxides provides electrocatalytic activity and enhance the electricity generation ability via the direct oxidation of imtermediates. The dual functions of the resulting catalysts are expected to imporove significantly the power output of microbial fuel cell.

微生物燃料电池（MFC）具有提供电能和治理环境的双重作用。但目前的MFC输出功率很小。本项目根据前期的研究，提出构筑双功能非铂催化剂的解决方案。拟用模板法制备多孔阵列钼/钨氧化物支撑体；对支撑体实施表面碳化，制备钼/钨碳化物修饰的非铂催化剂；表征催化剂的组成、结构和表面形貌；研究催化剂的生物相容性及催化活性；组装实体电池考察催化剂的实际应用效果。在此基础上，阐明催化剂组成、结构和表面形貌与生物相容性及催化活性的关系，提出以钼/钨碳化物为主催化剂、多孔阵列钼/钨氧化物支撑体为次催化剂的新型催化体系构筑方法。组成和形貌可控的次催化剂提供生物相容性，结合主催化剂的金属导电性，增强催化剂通过微生物膜的产电功能；主催化剂的类铂性质，结合次催化剂对主催化剂的促进作用，赋予催化剂对有机小分子氧化的催化活性，增强催化剂通过氧化微生物发酵中间产物的产电功能。双功能的催化作用，可望显著提高MFC的功率输出。

微生物燃料电池(MFC)具有提供电能和治理环境的双重作用，但较低的功率输出限制了其发展应用。本项目提出构筑多孔阵列双功能非铂催化剂的解决方案。研究内容主要涉及制备多孔阵列支撑体, 构筑催化剂并表征其结构与性质, 以及组装实体电池考察催化剂的实际应用。得到了系列结果，主要包括：1) 提出构筑多孔碳的新方法，得到大比表面积的多孔阵列材料；2）设计出多种复合催化剂并研究了其结构和性能；3）提出了增强阳极生物相容性的方法，并通过理论计算阐明了增加机理。本项目研究结果，不仅为解决MFC发展面临的难题提供了新方法，也有助于不同类型的催化剂设计。.项目共发表SCI论文11篇(含在审3篇)，申请发明专利5件