掺氮碳纳米层包裹的掺氮二氧化钛核壳结构制备及其氧还原催化研究  

Study on the enhanced oxygen reduction reaction at core-shell structures of N-Doped TiO_(2)encapsulated in N-Doped carbon

作　　者：石超凡 张浩权 李文鹏[1] SHI Chaofan;ZHANG Haoquan;LI Wenpeng(School of Chemistry and Chemical Engineering,Qilu University of Technology(Shandong Academy of Sciences),Jinan 250350,China)

机构地区：[1]齐鲁工业大学(山东省科学院)化学与化工学院,山东济南250353

出　　处：《齐鲁工业大学学报》2024年第1期52-56,共5页Journal of Qilu University of Technology

基　　金：山东省自然科学基金(ZR2020QB070)。

摘　　要：氧还原反应是燃料电池阴极的关键反应,目前工业上主要用昂贵稀缺的铂材料作为燃料电池的氧还原催化剂,发展廉价高效的氧还原催化剂对降低燃料电池成本具有重要意义。通过水热反应和煅烧法制备了掺氮碳纳米层包裹的掺氮二氧化钛(N-TiO2@N-C)核壳结构材料,用透射电镜、X射线衍射、X射线光电子能谱、电化学测试等手段对该催化剂进行了表征,得出其在碱性介质中具有比贵金属催化剂Pd/C和Pt/C更高的氧还原催化活性。Oxygen reduction reaction(ORR)is the key cathode reaction in fuel cells.Fabricate catalyst with earth-abundant elements instead of platinum is an effective method to reduce the cost of fuel cells.In this work,nitrogen-doped TiO_(2)encapsulated in nitrogen-doped carbon(N-TiO_(2)@N-C)was facile fabricated with hydrothermal-calcination procedures.N-TiO_(2)@N-C was characterized by transmission electron microscope,X-ray diffraction,X-ray photoelectron spectroscopy and electrochemical measurements.It exhibits a higher activity for oxygen reduction reaction in alkaline media compared with Pd/C and Pt/C.

关 键 词：氧还原反应 燃料电池 二氧化钛 核壳结构 碱性介质 

分 类 号：O646[理学—物理化学]