负载四氧化三钴纳米粒子的介孔碳基氧还原反应催化剂的电化学性能分析  

Cobaltosic Oxide Nanoparticles Supported on Mesoporous Carbon as Highly Efficient Electrocatalysts for Oxygen Reduction Reaction

作　　者：张震 邵鑫 黄明华 ZHANG Zhen;SHAO Xin;HUANG Ming-Hua(School of Materials Science and Engineering,Ocean University of China,Qingdao 266100,China)

机构地区：[1]中国海洋大学材料科学与工程学院,青岛266000

出　　处：《分析化学》2020年第6期721-726,共6页Chinese Journal of Analytical Chemistry

基　　金：国家自然科学基金(No.21775142);中德科学中心项目(No.GZ 1351);中央高校基本科研基金项目(No.201822008)资助。

摘　　要：采用软模板法合成介孔碳材料前驱体,引入钴盐,通过高温煅烧等步骤得到负载钴氧化物纳米粒子的介孔碳基催化剂。通过X-射线衍射(XRD)、透射电子显微镜(TEM)、X-射线光电子能谱(XPS)、循环伏安法(CV)和线性扫描伏安法(LSV)等测试方法对所制备的催化剂的成分、结构和电化学性能进行了表征。结果表明,钴以四氧化三钴的形式成功负载于介孔碳材料基底,所得催化剂在碱性环境中表现出与商业Pt/C催化剂相当的氧还原催化活性,并且其稳定性优于商业Pt/C催化剂,有望取代造价高昂的Pt/C基催化剂,成为新型燃料电池阴极催化材料。Fuel cell, as a prospective energy conversion device system, provides high conversion efficiency and cleaning products. However, the development of fuel cell is significantly hindered by the sluggish kinetics of the oxygen reduction reaction(ORR) in the cathode, so high-efficiency cathode catalyst is highly required. As the state-of-the-art electrocatalysts, platinum-based materials are still the primary choice for ORR, but a series of issues including high cost and scarcity of raw materials make the large-scale applications of fuel cell difficult. Consequently, the development of non-noble metal catalystsis is becoming more urgent to solve the issue of the fuel cell. Herein, the mesoporous carbon precursors were first synthesized by the soft template method. Then the mixture of cobalt salts and the carbon precursors was heated at 120℃ to evaporate the solvent, followed by the calcination at 750℃. X-ray diffraction(XRD), transmission electron microscopy(TEM), X-ray photoelectron spectroscopy(XPS), transmission electron microscopy(TEM), cyclic voltammetry(CV) and linear sweep voltammetry(LSV) were used to characterize the obtained catalysts. The results showed that the cobalt oxide nanoparticles were successfully supported on the mesoporous carbon materials with high surface area. In an alkaline medium, the as-prepared catalyst exhibited high electrocatalytic activity for ORR, which was comparable to that of commercial Pt/C. It also showed a higher stability than the Pt/C catalyst. The catalyst was expected to replace the expensive Pt as a new cathode material for fuel cells.

关 键 词：介孔碳 四氧化三钴纳米粒子 氧还原反应 非贵金属催化剂 

分 类 号：O643.36[理学—物理化学] TM911.4[理学—化学]