划定微生物电合成中的阴极细胞外电子转移通路:极化电位的调制和Pt@C加法
Yue Wang1, Siyang Yu1, Xue Zheng1
1Fujian Provincial Key Laboratory of Soil Environmental Health and Regulation, College of Resources and Environment, Fujian Agriculture and Forestry University, Fuzhou 350002, China.
Bioresource technology
|April 30, 2024
概括
微生物电合成 (MES) 使用微生物从CO2中产生化学物质. 这项研究表明,阴极电位和纳米粒子如何影响微生物电子转移,优化化学合成.
科学领域:
- 电化学 电化学 电化学
- 微生物学 微生物学
- 生物技术是生物技术.
背景情况:
- 微生物电合成 (MES) 使用微生物催化剂通过减少二氧化碳进行化学合成.
- 了解阴极细胞外电子转移 (CEET) 对于推进MES技术至关重要.
- 进化反应可以影响MES系统中的CEET通路.
研究的目的:
- 调查不同阴极电位对MES中CEET的影响.
- 评估对碳 (Pt@C) 纳米颗粒对CEET机制的影响.
- 为了识别微生物社区的变化,以应对改变的电化学条件.
主要方法:
- MES反应堆在不同的阴极电位 (-1.05 V 和 -0.85 V) 上运行.
- 引入了Pt@C纳米粒子,以评估它们对电子转移的影响.
- 使用16S rRNA基因测序分析了微生物社区的组成.
主要成果:
- 通过 (H2) 介导的CEET显著,在 -1.05V时达到94.4%,没有Pt@C.
- 添加Pt@C减少了H2介导CEET,在-1.05V下降至76.6%,在-0.85V下降至19.9%.
- 主导的微生物,BRH-c20a,在Pt@C添加后,其相对丰度发生了变化.
结论:
- 阴极电位和Pt@C加值是调整MES性能的关键因素.
- Pt@C纳米粒子改变了CEET路径,有利于在较低的电位下直接电子转移而不是H2介导.
- 微生物社区结构对MES中的电化学修饰很敏感.
相关概念视频
Controlled-Potential Coulometry: Electrolytic Methods
161
Controlled-potential coulometry, also known as potentiostatic coulometry, employs a three-electrode system in which the working electrode's potential is precisely regulated using a potentiostat. Platinum working electrodes are utilized for positive potentials, while mercury pool electrodes are favored for extremely negative potentials. The platinum counter electrode is separated from the analyte using a membrane or salt bridge to avoid interference in the analysis.
The chosen potential...
The chosen potential...
161
Electrolysis
26.3K
In a galvanic cell, the electrical work is done by a redox system on its surroundings as electrons produced by the spontaneous redox reactions are transferred through an external circuit. Alternatively, an external circuit does work on a redox system by imposing a voltage sufficient to drive an otherwise nonspontaneous reaction in a process known as electrolysis. For instance, recharging a battery involves the use of an external power source to drive the spontaneous (discharge) cell reaction in...
26.3K
Electrodeposition
630
Electrodeposition is a technique used to separate an analyte from interferents by electrochemical processes. Here, the analyte is a metal ion that can be deposited on an electrode immersed in the sample solution. The electrochemical setup consists of an anode and a cathode. When an electric current is applied to the setup, oxidation occurs at the anode. At the cathode, which consists of a large metal surface, metal ions undergo reduction and deposit onto the surface.
Electrodeposition can...
Electrodeposition can...
630
The Z-Scheme of Electron Transport in Photosynthesis
10.1K
The light reactions of photosynthesis assume a linear flow of electrons from water to NADP+. During this process, light energy drives the splitting of water molecules to produce oxygen. However, oxidation of water molecules is a thermodynamically unfavorable reaction and requires a strong oxidizing agent. This is accomplished by the first product of light reactions: oxidized P680 (or P680+), the most powerful oxidizing agent known in biology. The oxidized P680 that acquires an electron from the...
10.1K
Standard Electrode Potentials
43.8K
On comparing the reactivity of silver and lead, it is observed that the two ionic species, Ag+ (aq) and Pb2+ (aq), show a difference in their redox reactivity towards copper: the silver ion undergoes spontaneous reduction, while the lead ion does not. This relative redox activity can be easily quantified in electrochemical cells by a property called cell potential. This property is commonly known as cell voltage in electrochemistry, and it is a measure of the energy which accompanies the charge...
43.8K
The Electron Transport Chain
16.6K
The electron transport chain or oxidative phosphorylation is an exothermic process in which free energy released during electron transfer reactions is coupled to ATP synthesis. This process is a significant source of energy in aerobic cells, and therefore inhibitors of the electron transport chain can be detrimental to the cell's metabolic processes.
Inhibitors of the electron transport chain
Rotenone, a widely used pesticide, prevents electron transfer from Fe-S cluster to ubiquinone or Q...
Inhibitors of the electron transport chain
Rotenone, a widely used pesticide, prevents electron transfer from Fe-S cluster to ubiquinone or Q...
16.6K


