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氮掺杂石墨烯方法提升无膜酶生物燃料电池性能

FIE能源前沿期刊2020-04-28 04:22:49

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对原生石墨烯进行杂原子掺杂是一种获取新催化特性的有效途径,这种方法有望开辟石墨烯在能量转换与存储设备中的新的应用潜力。例如,氮掺杂石墨烯在许多电化学系统中展现出非常优异的性能,包括氧还原反应以及最新的葡萄糖氧化反应。氮掺杂石墨烯对双氧水(H2O2)的高度敏感性使得高灵敏度和快速响应的酶生物传感器的开发成为可能。然而,这里面存在的一个有待阐明的问题是,提高对葡萄糖检测的阳极响应是否可以促进酶生物燃料电池整体性能的提升。本文首先通过无催化剂的单步热处理法合成氮掺杂石墨烯,然后将其作为生物催化剂载体用于无膜酶生物燃料电池,以探究其在改变电池性能特性方面所起到的作用。研究结果表明,石墨烯结构中的电子受体氮位点可以有效强化介体(氧化还原聚合物)、酶氧化还原活性位点以及电极表面之间的电子传输效率。此外,当生物阳极采用高掺杂度的氮掺杂石墨烯进行修饰时,无膜酶生物燃料电池的输出功率和电流密度达到最好性能。

原文信息

Fronties in Energy【2018, 12(2):233-238】

Nitrogen-doped graphene approach to enhance the performance of a membraneless enzymatic biofuel cell

Alireza AHMADIAN YAZDI, Jie XU*

Corresponding author: Jie XU

Department of Mechanical and Industrial Engineering, University of Illinois at Chicago, Chicago, IL 60607, USA 

Citation: Alireza AHMADIAN YAZDI, Jie XU. Nitrogen-doped graphene approach to enhance the performance of a membraneless enzymatic biofuel cell. Front. Energy, 2018, 12(2): 233-238.

Type: Research article

Abstract:Heteroatom-doping of pristine graphene is an effective route for tailoring new characteristics in terms of catalytic performance which opens up potentials for new applications in energy conversion and storage devices. Nitrogen-doped graphene (N-graphene), for instance, has shown excellent performance in many electrochemical systems involving oxygen reduction reaction (ORR), and more recently glucose oxidation. Owing to the excellent H2O2H2O2 sensitivity of N-graphene, the development of highly sensitive and fast-response enzymatic biosensors is made possible. However, a question that needs to be addressed is whether or not improving the anodic response to glucose detection leads to a higher overall performance of enzymatic biofuel cell (eBFC). Thus, here we first synthesized N-graphene via a catalyst-free single-step thermal process, and made use of it as the biocatalyst support in a membraneless eBFC to identify its role in altering the performance characteristics. Our findings demonstrate that the electron accepting nitrogen sites in the graphene structure enhances the electron transfer efficiency between the mediator (redox polymer), redox active site of the enzymes, and electrode surface. Moreover, the best performance in terms of power output and current density of eBFCs was observed when the bioanode was modified with highly doped N-graphene.

Keywords:  enzymatic fuel cell, nitrogen-doped graphene, reduced graphene oxide, catalyst-free synthesis        

Frontiers in Energy期刊是由教育部主管,高等教育出版社、中国工程院和上海交通大学共同主办,德国施普林格公司海外发行的Frontiers系列英文学术期刊之一,于2007年1月创刊,以网络版和印刷版两种形式出版,为全英文季刊。

该刊主要刊登能源领域各分支学科具有创新性的综述论文(Review Articles)、研究论文(Research Articles)、专题文章(Feature Articles)和短篇报道(Short Communications)等。该刊主编为上海交通大学翁史烈院士、清华大学倪维斗院士和中国矿业大学彭苏萍院士,执行主编为上海交通大学黄震教授。本刊被SCI、Scopus、INSPEC、Google Scholar和CSCD(中国科学引文数据库)等国内外权威检索系统收录。

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