酸氧演化反应 铜和/或和氧化螺纹的活性,稳定性和耐久性
Christopher Pantayatiwong Liu1, Ethan Hwjchim Vang1, Tatiana Priamushko2
1Department of Chemical and Biomolecular Engineering, University of California, Irvine, California 92697, United States.
ACS catalysis
|May 22, 2025
概括
将铜 (Cu) 和 (Mn) 添加到 (Co) 螺旋体中,可以增强氧气演化反应的活性和稳定性,特别是通过稳定关键的位.
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
- 催化剂是一种催化剂.
背景情况:
- 螺旋是氧化演化反应 (OER) 的有希望的电催化剂.
- 在酸性介质中提高基于的OER催化剂的活性和耐用性仍然是一个挑战.
- 了解补充剂对螺旋体结构和电化学性能的作用至关重要.
研究的目的:
- 为了研究OER的Cu和Mn结合的Cospinels的结构和电化学特性.
- 阐明Cu和Mn影响催化剂性能和稳定性的机制.
- 确定增强四面体CO2+站点稳定的策略.
主要方法:
- 合成Cu和Mn化Cospinels的合成.
- 电化学表征包括循环电压计 (CV).
- 在现场分析使用在线感应合等离子体质谱法 (ICP-MS).
主要成果:
- 和在旋转网格中完全占据了八面体位置.
- 加入,尤其是,在酸性条件下改善了最初的OER活性.
- 含Mn的催化剂表现出增强的潜在循环耐用性.
- ICP-MS和CV显示,Mn限制了四面体CO2+的氧化.
- 在潜在静态条件下,Pure Co spinel在长期表现优越.
结论:
- 将Cu和Mn纳入Co spinels是一个有效的策略,以提高OER活动和稳定性.
- 稳定四面体CO2+位点通过合剂的结合是提高催化剂性能的关键.
- 这些发现强调了多潘特选择对于优化OER的螺旋电催化剂的重要性.
更多相关视频
05:47Preparation of Polyoxometalate-based Photo-responsive Membranes for the Photo-activation of Manganese Oxide Catalysts
Published on: August 7, 2018
7.1K
06:53Author Spotlight: Magnetometric Characterization of Intermediates in the Solid-State Electrochemistry of Redox-Active Metal-Organic Frameworks
Published on: June 9, 2023
2.5K
相关概念视频
03:06Alkali Metals
19.0K
Group 1 elements are soft and shiny metallic solids. They are malleable, ductile, and good conductors of heat and electricity. The melting points of the alkali metals are unusually low for metals and decrease going down the group, while the density increases going down the group with the exception of potassium (Table 1).
Table 1: Properties of the alkali metals
Table 1: Properties of the alkali metals
19.0K
02:47Voltaic/Galvanic Cells
55.8K
Spontaneous Chemical Reactions
Spontaneous redox reactions occur abundantly in nature. The chemical reaction occurring in a disposable AA battery powering our remote controls is one such example of a spontaneous redox reaction. Another example is the immersion of coiled copper wire into an aqueous silver nitrate solution. The reaction shows a gradual, visually impressive color change from colorless to bright blue and the formation of a grey precipitate on the copper wire. In this experiment,...
Spontaneous redox reactions occur abundantly in nature. The chemical reaction occurring in a disposable AA battery powering our remote controls is one such example of a spontaneous redox reaction. Another example is the immersion of coiled copper wire into an aqueous silver nitrate solution. The reaction shows a gradual, visually impressive color change from colorless to bright blue and the formation of a grey precipitate on the copper wire. In this experiment,...
55.8K
02:49Corrosion
23.6K
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...
23.6K
02:58Properties of Transition Metals
24.7K
Transition metals are defined as those elements that have partially filled d orbitals. As shown in Figure 1, the d-block elements in groups 3–12 are transition elements. The f-block elements, also called inner transition metals (the lanthanides and actinides), also meet this criterion because the d orbital is partially occupied before the f orbitals.
24.7K
03:02Colors and Magnetism
11.4K
Color in Coordination Complexes
When atoms or molecules absorb light at the proper frequency, their electrons are excited to higher-energy orbitals. For many main group atoms and molecules, the absorbed photons are in the ultraviolet range of the electromagnetic spectrum, which cannot be detected by the human eye. For coordination compounds, the energy difference between the d orbitals often allows photons in the visible range to be absorbed and emitted, which is seen as colors by the human...
When atoms or molecules absorb light at the proper frequency, their electrons are excited to higher-energy orbitals. For many main group atoms and molecules, the absorbed photons are in the ultraviolet range of the electromagnetic spectrum, which cannot be detected by the human eye. For coordination compounds, the energy difference between the d orbitals often allows photons in the visible range to be absorbed and emitted, which is seen as colors by the human...
11.4K
01:21Radical Oxidation of Allylic and Benzylic Alcohols
1.9K
Activated manganese(IV) oxide can selectively oxidize allylic and benzylic alcohols via a radical intermediate mechanism. Primary allylic alcohols are oxidized to aldehydes, while secondary allylic alcohols yield ketones. The redox reaction of potassium permanganate with an Mn(II) salt such as manganese sulfate (under either alkaline or acidic conditions), followed by thorough drying, yields the oxidizing agent: activated MnO2. While MnO2 is insoluble in the solvents used for the reaction, the...
1.9K