缺陷的铁基金属有机框架,通过连接体竞争和蚀刻效应,通过太阳能发电有效氧化水
Huan Liu1, Tengfei Zhang1, Dan Cui1
1School of Chemistry and Chemical Engineering/State Key Laboratory Incubation Base for Green Processing of Chemical Engineering, Shihezi University, Shihezi 832003, China.
Journal of colloid and interface science
|December 10, 2023
概括
本研究介绍了基于铁的新型二维金属有机框架 (MOF) 作为高效的电催化剂. 这些MOF在氧气演变和尿素氧化反应中表现出了卓越的性能,为增强太阳能气生产铺平了道路.
科学领域:
- 材料科学 材料科学 材料科学
- 电化学 电化学 电化学
- 纳米技术纳米技术
背景情况:
- 由于其独特的结构性质,二维金属有机框架 (MOFs) 对电催化有望出现.
- 挑战仍然存在,包括嵌入有机配体引起的活性位点密度低和导电性差.
研究的目的:
- 为了合成新的二维铁基MOF纳米板电催化剂.
- 评估它们在氧化演化反应 (OER) 和尿素氧化反应 (UOR) 中的性能.
- 探索它们在太阳能气生产中的应用.
主要方法:
- 使用过氧化蚀刻的一步热水合成.
- 制造基于铁的含MOF纳米板 (FcNi-BDC-H2O2 / NF).
- 使用太阳能电池组件对OER,UOR和整体水分的电化学测试.
主要成果:
- FcNi-BDC-H2O2/NF表现出极好的OER性能 (100mA·cm−2在258mV) 和高效的整体水分离 (1.542V为10mA·cm−2).
- 在太阳能电池组件中实现了19.5%的太阳能转换效率.
- 证明了显著的UOR性能 (10mA·cm-2在1.35V).
结论:
- 引入铁和H2O2蚀刻提高了Ni3+含量,并暴露了活性部位,改善了催化活性和质量转移.
- FcNi-BDC-H2O2/NF作为一个高效的OER和UOR的双功能催化剂.
- 提出了开发用于能源转换应用的基于MOF的先进电催化剂的可行战略.
更多相关视频
10:13A Technical Guide for Performing Spectroscopic Measurements on Metal-Organic Frameworks
Published on: April 28, 2023
2.4K
06:53Author Spotlight: Magnetometric Characterization of Intermediates in the Solid-State Electrochemistry of Redox-Active Metal-Organic Frameworks
Published on: June 9, 2023
2.0K
相关概念视频
02:49Corrosion
The degradation of metals due to natural electrochemical processes is known as corrosion. Rust formation on iron, tarnishing of silver, and the blue-green patina that develops on copper are examples of corrosion. Corrosion involves the oxidation of metals. Sometimes it is protective, such as the oxidation of copper or aluminum, wherein a protective layer of metal oxide or its derivatives forms on the surface, protecting the underlying metal from further oxidation. In other cases, corrosion is...
01:15Metabolism of Chemolithotrophs
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. However, because inorganic electron donors...
01:24Microbes and Other Elemental Cycles
Microbial activity plays a pivotal role in the biogeochemical cycling of iron and manganese, especially at the redox gradients characteristic of stratified aquatic environments. These cycles are driven by microbial transformations between oxidized and reduced forms of the metals, allowing organisms to exploit them for metabolic energy and structural purposes.Iron Cycling Across Redox GradientsIn neutral, oxygen-rich surface waters, iron is predominantly found in its oxidized, insoluble ferric...
01:27Microbial Leaching
Microbial leaching, also known as bioleaching, is an environmentally favorable method for extracting metals from low-grade ores using specific microorganisms. This biotechnological approach is particularly valuable for mining operations targeting copper, gold, and uranium, where traditional extraction methods may be economically or environmentally impractical.Copper Leaching and Microbial CatalysisIn copper bioleaching, crushed ore is arranged into heaps and irrigated with a dilute sulfuric...
01:19Acid Mine Drainage
Mining activities that disturb sulfide-rich rocks, particularly those containing pyrite (FeS₂), initiate a cascade of geochemical and microbiological processes with serious environmental implications. When exposed to air and water, pyrite undergoes oxidation, releasing sulfate, ultimately forming sulfuric acid and mobilizing heavy metals into surrounding water systems. This phenomenon, known as acid mine drainage (AMD), results in low pH waters laden with toxic elements that threaten aquatic...
01:23Microbial Fuel Cells
Microbial fuel cells (MFCs) are bioelectrochemical devices that generate electricity by exploiting the metabolic processes of electrogenic bacteria. These systems provide a renewable energy source and serve as an innovative method for treating organic waste, such as wastewater.A typical MFC consists of two chambers: an anoxic (oxygen-free) compartment that houses the bacteria and an oxic (oxygen-rich) compartment that contains oxygen as the terminal electron acceptor. Many MFCs use proton...