表面技术2017，Vol.46Issue(5)：189-195,7.DOI:10.16490/j.cnki.issn.1001-3660.2017.05.031
氧化铁/氮掺杂碳纳米管催化剂的制备与氧还原性能研究
Preparation and Oxygen Reduction Reaction Performance of Iron Oxide/Nitrogen Doped Carbon Nanotube Catalyst
摘要
Abstract
The work aims to explore oxygen reduction reaction (ORR) performance of non-noble metal as cathodic catalyst of fuel cell. Fe was sputtered on the surface of carbon nanotube (CNT) arrays in N2/Ar working atmosphere in the method of magnetron sputtering. Meanwhile, nitrogen was doped into the samples, then the samples were annealed at different temperature to prepare ORR catalysts for Fe2O3 supported on nitrogen-doped carbon nanotubes (Fe2O3/N-CNT). Scanning electron micro-scopy (SEM), X-ray diffractometer (XRD), and X-ray photoelectron spectroscopy (XPS) were employed to analyze morpholo-gy, structure and composition of the samples. And electrochemical test was conducted to study the ORR performance and cata-lytic kinetics of the samples. Annealing temperature had significant effects on morphology and ORR performance of the sam-ples. ORR activity of the samples first increased, and then decreased significantly as the annealing temperature increased. The catalyst annealed at 450 ℃ exhibited the best catalytic performance with onset potential at 0.715 V, peak potential at 0.6 V and electron transfer number ranging within 3.3~3.6 in 0.1 mol/L KOH solution. The Fe2O3/N-CNT catalyst exhibits good oxygen reduction activity. Pyridinic-N is the possible active site of ORR in this catalyst. The feasible and inexpensive preparation me-thod makes this electrocatalyst promising in replacing Pt-based noble metal.关键词
氧还原/磁控溅射/碳纳米管/氧化铁/氮掺杂Key words
oxygen reduction/magnetron sputtering/carbon nanotube/Fe2O3/nitrogen doping分类
矿业与冶金引用本文复制引用
张颖,李萍炜,尹徐影,赵斌..氧化铁/氮掺杂碳纳米管催化剂的制备与氧还原性能研究[J].表面技术,2017,46(5):189-195,7.基金项目
上海市自然科学基金(16ZR1423500) Suported by the Natural Science Fundation of Shanghai (16ZR1423500) （16ZR1423500）
