Related Experiment Video
Updated: Aug 7, 2025
05:41
Photochemical Oxidative Growth of Iridium Oxide Nanoparticles on CdSe@CdS Nanorods
Published on: February 11, 2016
9.6K
Photosystem II Inspired NiFe-Based Electrocatalysts for Efficient Water Oxidation via Second Coordination Sphere
Ming Liu1, Na Li1,2, Xuemin Wang1
1School of Materials Science and Engineering, Nankai University, Tianjin, 300350, China.
Angewandte Chemie (International Ed. in English)
|March 10, 2023
Summary
Researchers developed new electrocatalysts for the oxygen evolution reaction (OER) by incorporating FeO6/NiO6 units and carboxylate anions. These catalysts accelerate proton transfer, enhancing OER efficiency and stability.
Area of Science:
- Electrochemistry
- Materials Science
- Catalysis
Background:
- The oxygen evolution reaction (OER) is crucial for energy conversion but is limited by slow proton transfer.
- Mismatched electron and proton transfer rates hinder electrocatalytic efficiency.
Purpose of the Study:
- To develop novel electrocatalysts that accelerate proton transfer in OER.
- To elucidate the kinetic mechanism of enhanced OER activity.
Main Methods:
- Synthesis of FeO6/NiO6-based electrocatalysts with carboxylate anions (TA2-).
- Electrocatalytic performance testing (overpotential, stability).
- In situ Raman spectroscopy and theoretical calculations to study the mechanism.
Main Results:
- Optimized catalyst exhibited a low overpotential of 270 mV at 200 mA cm-2.
- Demonstrated excellent cycling stability exceeding 300 hours.
- Proposed a proton-transfer-promotion mechanism involving TA2- as a proton acceptor.
Conclusions:
- Synergistic effects between metal units and TA2- enhance OER activity.
- TA2- facilitates proton transfer, optimizing O-H adsorption and reducing O-O bond formation barriers.
- The developed catalysts offer a promising solution for efficient electrocatalytic OER.
More Related Videos
05:47Preparation of Polyoxometalate-based Photo-responsive Membranes for the Photo-activation of Manganese Oxide Catalysts
Published on: August 7, 2018
7.8K
12:47Preparation and Use of Photocatalytically Active Segmented Ag|ZnO and Coaxial TiO2-Ag Nanowires Made by Templated Electrodeposition
Published on: May 2, 2014
21.8K
Related Concept Videos
01:22Photosystem II
71.8K
The multi-protein complex photosystem II (PS II) harvests photons and transfers their energy through its bound pigments to its reaction center, and ultimately to photosystem I (PSI) through the electron transport chain. The pigments responsible for caputirng the light energy in photosystems include chlorophyll a, chlorophyll b, and carotenoids.
The pigment molecules are arranged across two photosystem domains — the antenna complex and the reaction center. The main aim of the pigment...
The pigment molecules are arranged across two photosystem domains — the antenna complex and the reaction center. The main aim of the pigment...
71.8K
01:34The Z-Scheme of Electron Transport in Photosynthesis
10.3K
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...
10.3K
01:27Photosystem I
63.6K
Although structurally similar to photosystem II (PSII), photosystem I (PSI) is has a different electron supplier and electron acceptor.
Both these photosystems work in concert. An excited electron from PSII is relayed to PSI via an electron transport chain in the thylakoid membrane of the chloroplast, which is comprised of the carrier molecule plastoquinone, the dual-protein cytochrome complex, and plastocyanin. As electrons move between PSII and PSI, they lose energy and must be re-energized...
Both these photosystems work in concert. An excited electron from PSII is relayed to PSI via an electron transport chain in the thylakoid membrane of the chloroplast, which is comprised of the carrier molecule plastoquinone, the dual-protein cytochrome complex, and plastocyanin. As electrons move between PSII and PSI, they lose energy and must be re-energized...
63.6K
01:26Oxygenic Photosynthesis
56
Oxygenic photosynthesis is a fundamental process in which light energy is harnessed to drive the oxidation of water, leading to the production of molecular oxygen (O₂), adenosine triphosphate (ATP), and nicotinamide adenine dinucleotide phosphate (NADPH). This process is essential for sustaining aerobic life on Earth and is primarily carried out by cyanobacteria, algae, and plants. The core of oxygenic photosynthesis lies in the thylakoid membranes, where chlorophyll pigments facilitate...
56
01:26Thermal and Photochemical Electrocyclic Reactions: Overview
2.4K
Electrocyclic reactions are reversible reactions. They involve an intramolecular cyclization or ring-opening of a conjugated polyene. Shown below are two examples of electrocyclic reactions. In the first reaction, the formation of the cyclic product is favored. In contrast, in the second reaction, ring-opening is favored due to the high ring strain associated with cyclobutene formation.
2.4K
01:32Photosystems
4.9K
Photosystems are multiprotein complexes that form the functional units of photosynthesis in plants, algae, and cyanobacteria. They are found embedded in the membrane of tiny sac-like structures called thylakoids placed inside the chloroplast.
Functioning of Photosystems
Photosystems contain many pigment molecules, such as chlorophylls and carotenoids, arranged in a particular organization across two domains — the antenna complex and the reaction center. The main aim of the pigment...
Functioning of Photosystems
Photosystems contain many pigment molecules, such as chlorophylls and carotenoids, arranged in a particular organization across two domains — the antenna complex and the reaction center. The main aim of the pigment...
4.9K