Coexistence of anodic and cathodic reactions at the scale of a single microbial electrode elucidated by coupling experimental, analytical and numerical approaches
{"title":"Coexistence of anodic and cathodic reactions at the scale of a single microbial electrode elucidated by coupling experimental, analytical and numerical approaches","authors":"","doi":"10.1016/j.jpowsour.2024.235600","DOIUrl":null,"url":null,"abstract":"<div><div>Due to the complex biogeochemistry of marine sedimentary systems, the burial depth of sedimentary electrodes significantly influences their bioelectrochemical activity. This study investigates the impact of burial conditions on sedimentary microbial electrodes in oxic and suboxic zones of reconstructed sedimentary systems was investigated. Carbon-felt electrodes were deployed in laboratory reactors filled with fresh marine sediments and seawater under three different exposure conditions. The results showed that the placement of electrodes, whether in sediments or in seawater, profoundly affected both the electrical current (anodic or cathodic) and the microbial communities colonizing the electrode biofilm. Electrodes placement in the transition zone between the oxic and suboxic zones led to the formation of microbial electrodes with hybrid bioelectrochemical properties. Analytical and numerical models were developed to calculate the ratio of anodic and cathodic surfaces operating at the scale of these sedimentary microbial electrodes.</div></div>","PeriodicalId":377,"journal":{"name":"Journal of Power Sources","volume":null,"pages":null},"PeriodicalIF":8.1000,"publicationDate":"2024-10-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Power Sources","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0378775324015520","RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"CHEMISTRY, PHYSICAL","Score":null,"Total":0}
引用次数: 0
Abstract
Due to the complex biogeochemistry of marine sedimentary systems, the burial depth of sedimentary electrodes significantly influences their bioelectrochemical activity. This study investigates the impact of burial conditions on sedimentary microbial electrodes in oxic and suboxic zones of reconstructed sedimentary systems was investigated. Carbon-felt electrodes were deployed in laboratory reactors filled with fresh marine sediments and seawater under three different exposure conditions. The results showed that the placement of electrodes, whether in sediments or in seawater, profoundly affected both the electrical current (anodic or cathodic) and the microbial communities colonizing the electrode biofilm. Electrodes placement in the transition zone between the oxic and suboxic zones led to the formation of microbial electrodes with hybrid bioelectrochemical properties. Analytical and numerical models were developed to calculate the ratio of anodic and cathodic surfaces operating at the scale of these sedimentary microbial electrodes.
期刊介绍:
The Journal of Power Sources is a publication catering to researchers and technologists interested in various aspects of the science, technology, and applications of electrochemical power sources. It covers original research and reviews on primary and secondary batteries, fuel cells, supercapacitors, and photo-electrochemical cells.
Topics considered include the research, development and applications of nanomaterials and novel componentry for these devices. Examples of applications of these electrochemical power sources include:
• Portable electronics
• Electric and Hybrid Electric Vehicles
• Uninterruptible Power Supply (UPS) systems
• Storage of renewable energy
• Satellites and deep space probes
• Boats and ships, drones and aircrafts
• Wearable energy storage systems