摘要
本文发展了一种氮掺杂稻壳基多孔炭(N-RHPC)的制备方法,即将RHPC在氨气氛围下进行高温处理,操作简单,有利于大规模制备。结果表明,N-RHPC的介孔体积、石墨化程度明显提高,XPS N 1s谱证实了N原子在RHPC结构上的有效掺杂。N-RHPC作为ORR电催化剂具有与商用Pt/C接近的电催化活性,并具有较好的稳定性以及耐甲醇毒性,这主要是由于氨气氛围下对RHPC的高温处理使N原子进入RHPC中而引入了大量的催化位点所致。N-RHPC制备方法简单,性价比高,作为电催化剂具有很好的应用前景。
A N-doped rice husk-based porous carbon(N-RHPC) was cost-effectively prepared by simply treating RHPC at high temperature in an ammonia atmosphere. Results show that the mesopore volume and degree of graphitization of N-RHPC are significantly increased by the treatment. N atoms are doped in the RHPC structure in the form of pyridinic N(398.5 ± 0.1 eV), pyridonic N(399.3 ± 0.1 eV), and graphitic N groups(401.1 ± 0.1 eV) and N-oxide(401.8 ± 0.1 eV). Compared with a commercial Pt/C catalyst, the N-RHPC as an oxygen reduction electrocatalyst has a similar electrocatalytic activity, and better stability and methanol toxicity resistance. This excellent performance is ascribed to the increased number of catalytic sites afforded by the nitrogen species, the improved degree of graphitization that increases electron transfer, and the unique pore structure with macropores, mesopores and micropores for fast ion transport.
作者
时军
林楠
林海波
杨瑾
张文礼
SHI Jun;LIN Nan;LIN Hai-bo;YANG Jin;ZHANG Wen-li(State Key Laboratory of Inorganic Synthesis and Preparative Chemistry,Jilin University,Changchun 130012,China;Institute of Energy and Process Systems Engineering,Technische Universitaet Braunschweig,Franz-Liszt-Str.35,Braunschweig 38092,Germany;Zhuhai College of Jilin University,Zhuhai 519041,China;Materials Science and Engineering,Physical Science and Engineering Division,King Abdullah University of Science and Technology(KAUST),Thuwal 23955-6900,Saudi Arabia)
出处
《新型炭材料》
SCIE
EI
CAS
CSCD
北大核心
2020年第4期401-409,共9页
New Carbon Materials
基金
国家重点研发计划项目(2017YFB0307500)
国家自然科学基金项目(21975101)
吉林大学科技创新团队项目(2017TD-31)
长春市“双十”重大科技专项工程(17SS018).
关键词
稻壳基多孔炭
氧气还原反应
氮掺杂稻壳基多孔炭
电催化剂
Rice husk-based porous carbon
Oxygen reduction reaction
N-doped porous carbon
Electrocatalysts
