气候变化领域集成服务门户(CCPortal): Copper-bottomed: Electrochemically active bacteria exploit conductive sulphide networks for enhanced electrogeneity

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DOI	10.1039/d0ee01281e
	Copper-bottomed: Electrochemically active bacteria exploit conductive sulphide networks for enhanced electrogeneity
	Beuth L.; Pfeiffer C.P.; Schröder U.
发表日期	2020
ISSN	17545692
起始页码	3102
结束页码	3109
卷号	13 期号:9
英文摘要	In this study, we demonstrate that anodic electroactive bacteria like Geobacter sulfurreducens generate copper(i) and copper(ii) sulphides when grown on copper electrodes. The insoluble copper sulphides form a conductive network within the biofilms, strongly enhancing the biofilm electrogeneity-i.e., the ability of the biofilm to produce electric currents. Compared to biofilms grown on graphite, the average relative current density of copper-based biofilms was 237%, with a maximum geometric current density of 1.59 ± 0.23 mA cm-2. An additional electrochemical CuS deposition prior to biofilm cultivation further increased the bioelectrocatalytic current generation to 2 mA cm-2. The chemical deposition of CuS onto graphite allowed cultivating biofilms with current densities 134% higher than at unmodified graphite. This approach-the chemical CuS deposition onto inexpensive electrode materials-thus represents a promising pathway for the development of scalable, high-performance electrode materials for microbial electrochemical technologies. This journal is © The Royal Society of Chemistry.
英文关键词	Bacteria; Biofilms; Current density; Deposition; Electrochemical electrodes; Graphite; Sulfide minerals; Sulfur compounds; Bioelectrocatalytic currents; Chemical deposition; Conductive networks; Copper electrodes; Electrochemical technology; Electrochemically active bacteria; Electrode material; Geobacter sulfurreducens; Copper compounds; bacterium; concentration (composition); copper; electrochemical method; electrochemistry; performance assessment; Geobacter sulfurreducens
语种	英语
来源期刊	Energy & Environmental Science
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/189572
作者单位	Institute of Environmental and Sustainable Chemistry, Technische Universität Braunschweig, Hagenring 30, Braunschweig, 38106, Germany
推荐引用方式 GB/T 7714	Beuth L.,Pfeiffer C.P.,Schröder U.. Copper-bottomed: Electrochemically active bacteria exploit conductive sulphide networks for enhanced electrogeneity[J],2020,13(9).
APA	Beuth L.,Pfeiffer C.P.,&Schröder U..(2020).Copper-bottomed: Electrochemically active bacteria exploit conductive sulphide networks for enhanced electrogeneity.Energy & Environmental Science,13(9).
MLA	Beuth L.,et al."Copper-bottomed: Electrochemically active bacteria exploit conductive sulphide networks for enhanced electrogeneity".Energy & Environmental Science 13.9(2020).