有效和强大的混合分子光电极用于在中性pH下氧化水,基于与聚合物碳化物共性结合的Ru复合物
Martina Salati1,2, Sanjit Mondal3, Michael Volokh3
1Institute of Chemical Research of Catalonia (ICIQ), Barcelona Institute of Science and Technology (BIST), Tarragona 43007, Spain.
概括
这项研究通过对催化剂与二氧化碳进行共价连接来增强绿色的生产. 由此产生的混合材料有效地使用光线分解水,显示出更好的电荷分离和稳定性,用于可持续能源.
科学领域:
- 材料科学 材料科学 材料科学
- 催化剂是一种催化剂.
- 可再生能源可再生能源是可再生能源.
背景情况:
- 光诱导的水分裂 (hν-WS) 是可持续绿色的关键.
- 光电化学水氧化 (WO) 是至关重要的,但面临着动力学和热力学挑战.
- 聚合碳化物 (CN) 异构结构看起来很有前途,但存在诸如电荷分离和稳定性差等局限性.
研究的目的:
- 为了克服CN的局限性,高效的光电化学氧化水.
- 通过与基于Ru的分子水氧化催化剂 (WOC) 共同功能化CN来开发混合光电极.
- 研究新型CNTM@Ru混合物的光电催化性能和潜在机制.
主要方法:
- 聚合碳化物 (CN) 与基于Ru的分子WOC的共价功能化,以创建CNTM@Ru.
- 在模拟的太阳辐射 (1日) 下对CNTM@Ru进行水氧化的光电催化评估.
- 进行全面的光物理分析,以了解电荷分离和界面电荷转移动态.
主要成果:
- 在15小时内,CNTM@Ru混合光电极在1.23V与RHE之间表现出持续光电流密度为~480μA cm-2.
- 在中性pH下实现了超过2000的营业额 (),显示出高的催化效率和稳定性.
- 光物理研究证实了增强的电荷分离和界面电荷转移动态.
结论:
- 分子WOC与CN的共价定显著增强光电催化水氧化.
- 该CNTM@Ru混合体表现出协同效应,促进多电子转移和高效的催化.
- 这种方法为开发用于可持续生产的先进材料提供了一个有希望的战略.
更多相关视频
19:58Palladium N-Heterocyclic Carbene Complexes: Synthesis from Benzimidazolium Salts and Catalytic Activity in Carbon-carbon Bond-forming Reactions
Published on: July 30, 2017
10.2K
05:48Controlled Photoredox Ring-Opening Polymerization of O-Carboxyanhydrides Mediated by Ni/Zn Complexes
Published on: November 21, 2017
8.6K
相关概念视频
Covalent Bonds
161.6K
Overview
161.6K
Covalent Bonds
10.5K
Overview
When two atoms share electrons to complete their valence shells, they create a covalent bond. An atom's electronegativity—the force with which shared electrons are pulled towards an atom—determines how the electrons are shared. Molecules formed with covalent bonds can be either polar or nonpolar. Atoms with similar electronegativities form nonpolar covalent bonds; the electrons are shared equally. Atoms with different electronegativities share electrons unequally,...
When two atoms share electrons to complete their valence shells, they create a covalent bond. An atom's electronegativity—the force with which shared electrons are pulled towards an atom—determines how the electrons are shared. Molecules formed with covalent bonds can be either polar or nonpolar. Atoms with similar electronegativities form nonpolar covalent bonds; the electrons are shared equally. Atoms with different electronegativities share electrons unequally,...
10.5K
Covalent Bonding and Lewis Structures
61.2K
Compared to ionic bonds, which results from the transfer of electrons between metallic and nonmetallic atoms, covalent bonds result from the mutual attraction of atoms for a “shared” pair of electrons.
61.2K
Network Covalent Solids
16.1K
Network covalent solids contain a three-dimensional network of covalently bonded atoms as found in the crystal structures of nonmetals like diamond, graphite, silicon, and some covalent compounds, such as silicon dioxide (sand) and silicon carbide (carborundum, the abrasive on sandpaper). Many minerals have networks of covalent bonds.
To break or to melt a covalent network solid, covalent bonds must be broken. Because covalent bonds are relatively strong, covalent network solids are typically...
To break or to melt a covalent network solid, covalent bonds must be broken. Because covalent bonds are relatively strong, covalent network solids are typically...
16.1K
Metal-Ligand Bonds
24.2K
The hemoglobin in the blood, the chlorophyll in green plants, vitamin B-12, and the catalyst used in the manufacture of polyethylene all contain coordination compounds. Ions of the metals, especially the transition metals, are likely to form complexes.
In these complexes, transition metals form coordinate covalent bonds, a kind of Lewis acid-base interaction in which both of the electrons in the bond are contributed by a donor (Lewis base) to an electron acceptor (Lewis acid). The Lewis acid in...
In these complexes, transition metals form coordinate covalent bonds, a kind of Lewis acid-base interaction in which both of the electrons in the bond are contributed by a donor (Lewis base) to an electron acceptor (Lewis acid). The Lewis acid in...
24.2K
Polar Covalent Bonds
29.1K
Covalent bonds are formed between two atoms when both have similar tendencies to attract electrons to themselves (i.e., when both atoms have identical or fairly similar ionization energies and electron affinities). Nonmetal atoms frequently form covalent bonds with other nonmetal atoms. For example, the hydrogen molecule, H2, contains a covalent bond between its two hydrogen atoms. When two separate hydrogen atoms with a particular potential energy approach each other, their valence orbitals...
29.1K
