生物适应性Ni单个原子释放了来自CO2的异醇的高速微生物电合成
Guangye Zhou1, Jonathan R Humphreys2, Dongfang Cheng3
1Department of Civil and Environmental Engineering and Andlinger Center for Energy and the Environment, Princeton University, Princeton, NJ, USA.
Nature communications
|January 15, 2026
概括
一种新的生物适应性单原子催化剂 (Ni SAC) 能够使用工程微生物从二氧化碳 (CO2) 中高效的异醇电合成. 这一突破克服了微生物介质中的催化剂失活,为成本有效的二氧化碳转化铺平了道路.
科学领域:
- 电化学 电化学 电化学
- 生物技术是生物技术.
- 催化剂是一种催化剂.
背景情况:
- 结合电化学二氧化碳减排和微生物升级的混合系统为高价值有机化合物合成提供了潜力.
- 微生物生长介质中的电催化剂失活阻碍了这些系统的效率并增加了成本.
研究的目的:
- 开发一种强大而高效的方法,利用生物适应性催化剂和基因工程微生物从二氧化碳中电合成异醇 (IPA).
- 研究复杂生物电解质中催化剂稳定性和性能的机制.
主要方法:
- 使用生物适应性单原子催化剂 (Ni SAC) 与基因工程Clostridium ljungdahlii.
- 采用碳中介途径减少二氧化碳,避免使用H2作为电子载体.
- 使用现场拉曼和X射线吸收光谱学特征化催化剂性能,并补充了理论计算.
主要成果:
- 在复杂的生长介质中实现了高CO法拉代克效率 (高达92%),显著优于传统的白银催化剂.
- 在电流密度为10.8A/m2和161.3 mg/L/day的生产速度下,已证明稳定的异醇生产.
- 证实了Ni SAC对有机吸附的抗性和生物电解质中的结构稳定性.
结论:
- 开发的Ni SAC/微生物系统为二氧化碳转化为异醇提供了稳定高效的途径.
- Ni SAC的生物适应性是克服微生物环境中催化剂失活的关键.
- 这种综合方法为从二氧化碳中可持续生产化学品提供了一个有希望的战略.
相关概念视频
Carbon-dioxide Fixation
648
Carbon dioxide fixation in prokaryotes enables the assimilation of inorganic carbon into organic molecules, supporting biosynthetic pathways, sustaining ecosystems, and contributing to the global carbon cycle. It also has industrial applications in carbon capture and bioproduct synthesis. Autotrophic organisms rely on this process to utilize CO₂ as a carbon source in diverse environments.The Calvin CycleThe Calvin cycle is the most widespread carbon fixation mechanism, primarily used by...
648
Microbial Fermentation
1.3K
Fermentation is a crucial anaerobic metabolic process that enables microbes to derive energy from sugar without relying on oxygen or an electron transport chain. This process is fundamental to various biological and industrial applications and is classified based on the metabolic products generated.Role of Pyruvate in FermentationPyruvate and its derivatives serve as key electron acceptors in fermentative pathways. The oxidation of NADH to regenerate NAD+ is essential for the continuation of...
1.3K
Bioremediation
22.1K
Bioremediation is the use of prokaryotes, fungi, or plants to remove pollutants from the environment. This process has been used to remove harmful toxins in groundwater as a byproduct of agricultural run-off and also to clean up oil spills.
22.1K
Microbial Nutrition
1.1K
Organisms exhibit remarkable metabolic diversity, categorized based on how they acquire energy and carbon. These strategies enable survival in various ecological niches and are essential for maintaining energy flow and nutrient cycling within ecosystems.Energy and Carbon SourcesOrganisms are classified as phototrophs or chemotrophs based on energy acquisition. Phototrophs use light as their energy source, while chemotrophs rely on oxidizing chemical compounds. Further differentiation arises...
1.1K
Metabolism of Chemolithotrophs
790
Chemolithotrophs are microorganisms that obtain energy by oxidizing inorganic molecules such as hydrogen gas (H₂), ammonia (NH₃), reduced sulfur compounds (H₂S, S²⁻), and ferrous iron (Fe²⁺). Unlike heterotrophic organisms that rely on organic carbon, chemolithotrophs transfer electrons from these inorganic donors to the electron transport chain (ETC), generating a proton motive force (PMF) that drives ATP synthesis through oxidative phosphorylation.
790
Anoxygenic Photosynthesis
1.2K
Anoxygenic photosynthesis is a phototrophic process that captures light energy to drive carbon fixation without producing molecular oxygen. Unlike oxygenic photosynthesis, which utilizes water as an electron donor and releases oxygen, anoxygenic phototrophs use alternative electron donors such as hydrogen sulfide (H₂S), elemental sulfur (S⁰), or thiosulfate (S₂O₃²⁻). This process is carried out by diverse groups of bacteria, including purple bacteria, green...
1.2K


