基金Project(51274153) supported by the National Natural Science Foundation of ChinaProjects(2011CDA120,2015CFB523) supported by the Natural Science Foundation of Hubei Province of China+2 种基金Project(G201510) supported by the State Key Laboratory of Refractories and Metallurgy(Wuhan University of Science and Technology)ChinaProject(K201454) supported by the Youths Science Foundation of Wuhan Institute of Technology,China
文摘为了提高氮掺杂碳(N-C)材料的氧还原性能,采用后吸附法基于可在高温炭化过程中形成富缺陷碳材料及均匀分散的高活性M-N_(x)位点的沸石咪唑酯骨架-8衍生制备了Fe-Co-N-C催化剂。电化学测试结果表明采用150 mg Co-N-C催化剂吸附0.07 mmol Fe制备的Fe-Co-N-C催化剂在0.1 mol/L HClO_(4)中具有较高的半波电位(0.843 V vs. RHE)和较低的过氧化氢产率(<4%)。物性表征结果表明Fe-Co-N-C催化剂的优异氧还原活性可归因于其双金属活性位点(Fe/Co-N_(x))、丰富的微/介孔结构、较高的石墨化程度以及Fe/Fe_(3)C和Fe-N_(x)的共同作用。