A versatile biomass derived carbon material for oxygen reduction reaction, supercapacitors and oil/water separation
A versatile biomass derived carbon material for oxygen reduction reaction, supercapacitors and oil/water separation
复制标题
用于氧还原反应、超级电容器和油/水分离的多功能生物质衍生碳材料
DOI：
10.1016/j.nanoen.2017.01.045
复制
发表时间：
2017-03-01
期刊：
影响因子：
17.6
通讯作者：
Wei, Xianjun
中科院分区：
文献类型：
--
作者：
Gao, Shuyan;Li, Xiaoge;Wei, Xianjun
直接热解生物废弃物引起了人们的浓厚兴趣，这可能是因为这种经济和简便的方法为合成功能碳提供了一个高效和通用的平台。本研究描述了以杨柳絮为原料，通过不同的工艺合成多种用途的不同功能碳。从柳絮中提取的氮氧双掺杂碳(NODC-800)作为碱性燃料电池中的氧还原反应(ORR)催化剂，在催化活性、稳定性、抗甲醇越界和CO中毒方面，表现出优于商业铂/碳的电化学性能。此外，NODC-800作为超级电容器电极具有很高的容量(类似于0.5Ag(-1)下的251Fg(-1))，1000次循环后的保持率接近100%。一种从柳絮中提取的油植碳气凝胶被证明具有超亲油性和足够的渗透性，足以与油和有机液体“湿润”，并完全排斥水，实现油/水分离。这项工作是通过多种技术充分利用来自自然的原材料，实现能源可持续发展，保护环境免受石油和有机溶剂泄漏的成功案例。
Directly pyrolyzing biowastes has attracted intensive interest, probably because this economical and facile method provides an efficient and versatile platform for synthesizing functional carbons. This study describes the synthesis of different functional carbons from poplar catkins via different processes for multi-purpose applications. Nitrogen and oxygen dual-doped carbon (NODC-800) derived from catkins delivers superior electrochemical characteristics as oxygen reduction reaction (ORR) catalyst in alkaline fuel cell to that of commercial Pt/C in terms of catalytic activity, stability, resistance to methanol cross-over and CO poisoning. In addition, NODC-800 exhibits a high capacity (similar to 251 F g(-1) at 0.5 A g(-1)) with nearly 100% retention rate after 1000 cycles as supercapacitors electrodes. An oleophylic carbon aerogel derived from catkins is proven to be superoleophilic and porous enough to "wet" with oils and organic liquids and repel water completely to achieve oil/water separation. This work is a successful case to take full advantage of raw materials from nature via multiple technologies to achieve energy sustainable development and protect environmental from oils and organic solvents spill.