氮掺杂石油焦基碳量子点的高效制备及其电催化析氢性能
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- 英文论文题名：Petroleum Coke-based Nitrogen-doped Carbon Quantum Dots for Electrocatalytic Hydrogen Evolution
- 论文作者：饶袁 ; 王阳 ; 马骁 ; 刘卉 ; 邵晓东 ; 吴明铂
- 英文论文作者：Yuan Rao ; Yang Wang ; Xiao Ma ; Hui Liu ; Xiaodong Shao ; Mingbo Wu ; State Key Laboratory of Heavy Oil Processing ; China University of Petroleum
- 年：2016
- 作者机构：中国石油大学(华东)化学工程学院重质油国家重点实验室;
- 论文关键词：碳量子点 ; 石油焦 ; 电催化析氢
- 会议召开时间：2016-07-01
- 会议录名称：中国化学会第30届学术年会摘要集-第二十九分会：电化学材料
- 语种：中文
- 分类号：O643.36;TB383.1
- 学会代码：ZGHY
- 会议名称：中国化学会第30届学术年会-第二十九分会 ; 电化学材料
- 会议地点：中国辽宁大连
- 主办单位：中国化学会
- 学会名称：中国化学会
- 页数：1
- 文件大小：117k
- 原文格式：D
- 会议级别：全国
摘要
石油焦是石油炼制的副产物,量大价廉且含碳量高,灰分等杂质相对较少,是制备碳质材料的优质原料,开发石油焦基功能化碳材料是实现其高附加值利用的重要途径之一。碳量子点(Carbon Quantum Dots,CQDs)具有粒径小、比表面积大、官能团丰富、电子传导快等特点,在生物成像、药物传输、离子及分子检测等方面的应用已取较大进展。CQDs/MoS_2复合物已用于光诱导电催化析氢(HER),但其作用机理及应用价值还有待于深入研究。本文以石油焦为碳源,采用电化学氧化法,一步制得氮掺杂石油焦基CQDs。该法无需进行透析除盐纯化,高效环保且产品收率高达20%。所制N-CQDs表面含有大量含氮及含氧基团,易与其他化合物高效结合,在促进电子传输的同时可增加催化活性位点数目,增大催化剂有效作用面积。基于N-CQDs设计合成的CQDs/Ni_3S_2/NF(Nifoam,NF)复合型HER催化剂,在1 M KOH中电流密度高达150mA·cm~(-2),电流密度为10 mA·cm~(-2)时,过电位为-210 mV,在电催化析氢领域具有很好的应用前景。
Petroleum coke with high content of carbon and low content of ash is a by-product in oil refining process. As the increasing heavy component in crude oil, the development of petroleum coke-based functionalized carbon materials has become an important method to realize high value-added utilization of heavy oil. Here we report a one-step electrochemical oxidation method to prepare nitrogen-doped petroleum coke-based carbon quantum dots(CQDs), without further dialysis and purification, and the product yield reached up to 20%. CQDs/Ni_3S_2/NF was designed for high-performance binder-free catalyst for electrocatalytic hydrogen evolution, featured by a geometrical catalytic current density of 10 mA ·cm~(-2) at an overpotential of -210 mV in 1 M KOH, with outstanding long-term operational stability. The as-made CQDs/Ni_3S-2/NF has a good application future in the field of hydrogen evolution reaction(HER).
Petroleum coke with high content of carbon and low content of ash is a by-product in oil refining process. As the increasing heavy component in crude oil, the development of petroleum coke-based functionalized carbon materials has become an important method to realize high value-added utilization of heavy oil. Here we report a one-step electrochemical oxidation method to prepare nitrogen-doped petroleum coke-based carbon quantum dots(CQDs), without further dialysis and purification, and the product yield reached up to 20%. CQDs/Ni_3S_2/NF was designed for high-performance binder-free catalyst for electrocatalytic hydrogen evolution, featured by a geometrical catalytic current density of 10 mA ·cm~(-2) at an overpotential of -210 mV in 1 M KOH, with outstanding long-term operational stability. The as-made CQDs/Ni_3S-2/NF has a good application future in the field of hydrogen evolution reaction(HER).
引文
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