Promoting hole transfer for photoelectrochemical water oxidation through a manganese cluster catalyst bioinspired by natural photosystem II

2020 ◽  
Vol 56 (30) ◽  
pp. 4244-4247 ◽  
Author(s):  
Bin Gao ◽  
Tao Wang ◽  
Yang Li ◽  
Xiaoli Fan ◽  
Hao Gong ◽  
...  
Keyword(s):  
Photosystem Ii ◽  
Water Oxidation ◽  
Manganese Cluster ◽  
Hole Transfer ◽  
Co Catalyst ◽  
Photoelectrochemical Water Oxidation

A Mn4O4–cubane molecule bioinspired by the natural photosystem II was used as a co-catalyst in photoelectrochemical water oxidation.

Bifunctional citrate-Ni0.9Co0.1(OH)x layer coated fluorine-doped hematite for simultaneous hole extraction and injection towards efficient photoelectrochemical water oxidation

Nanoscale ◽  
2021 ◽  
Author(s):  
Peng Wang ◽  
Feng Li ◽  
Xuefeng Long ◽  
Tong Wang ◽  
Huan Chai ◽  
...  
Keyword(s):  
Surface Modification ◽  
Oxygen Evolution ◽  
Oxygen Evolution Reaction ◽  
Water Oxidation ◽  
Surface Oxygen ◽  
Co Catalyst ◽  
Photoelectrochemical Water Oxidation

Surface modification by loading a water oxidation co-catalyst (WOC) is generally considered to be an efficient means to optimize the sluggish surface oxygen evolution reaction (OER) of hematite photoanode for...

Ultrathin FeFx nanolayers accelerating hole transfer for enhanced photoelectrochemical water oxidation

2018 ◽  
Vol 6 (40) ◽  
pp. 19342-19346 ◽  
Author(s):  
Chenchen Feng ◽  
Lei Wang ◽  
Shurong Fu ◽  
Kai Fan ◽  
Yajun Zhang ◽  
...  
Keyword(s):  
Water Oxidation ◽  
Hole Transfer ◽  
Highly Efficient ◽  
Photoelectrochemical Water Oxidation

Here, we demonstrate the in situ growth of ultrathin FeFx nanolayers on Fe2O3 photoanodes, acting as a highly efficient cocatalyst to accelerate hole transfer for improving PEC activity.

Direct electron transfer from photosystem II to hematite in a hybrid photoelectrochemical cell

2015 ◽  
Vol 51 (95) ◽  
pp. 16952-16955 ◽  
Author(s):  
Wangyin Wang ◽  
Zhiliang Wang ◽  
Qingjun Zhu ◽  
Guangye Han ◽  
Chunmei Ding ◽  
...  
Keyword(s):  
Electron Transfer ◽  
Photosystem Ii ◽  
Water Oxidation ◽  
Direct Electron Transfer ◽  
Photoelectrochemical Cell ◽  
Photoelectrochemical Water Oxidation

A hybrid photoanode integrating photosystem II with a hematite film is constructed for photoelectrochemical water oxidation.

scholarly journals Water oxidation chemistry of photosystem II

2002 ◽  
Vol 357 (1426) ◽  
pp. 1395-1405 ◽  
Author(s):  
John S. Vrettos ◽  
Gary W. Brudvig
Keyword(s):  
Photosystem Ii ◽  
Water Oxidation ◽  
Ion Selectivity ◽  
Bound Water ◽  
Nucleophilic Attack ◽  
Manganese Cluster ◽  
Bond Forming ◽  
Proton Coupled Electron Transfer ◽  
Tyrosine Z ◽  
Oxidation Chemistry

The O 2 –evolving complex of photosystem II catalyses the light–driven four–electron oxidation of water to dioxygen in photosynthesis. In this article, the steps leading to photosynthetic O 2 evolution are discussed. Emphasis is given to the proton–coupled electron–transfer steps involved in oxidation of the manganese cluster by oxidized tyrosine Z (Y Z ), the function of Ca 2+ and the mechanism by which water is activated for formation of an O–O bond. Based on a consideration of the biophysical studies of photosystem II and inorganic manganese model chemistry, a mechanism for photosynthetic O 2 evolution is presented in which the O–O bond–forming step occurs via nucleophilic attack on an electron–deficient Mn V =O species by a calcium–bound water molecule. The proposed mechanism includes specific roles for the tetranuclear manganese cluster, calcium, chloride, Y Z and His190 of the D1 polypeptide. Recent studies of the ion selectivity of the calcium site in the O 2 –evolving complex and of a functional inorganic manganese model system that test key aspects of this mechanism are also discussed.

scholarly journals ZnO/Ag/Ag2WO4 photo-electrodes with plasmonic behavior for enhanced photoelectrochemical water oxidation

RSC Advances ◽  
2019 ◽  
Vol 9 (15) ◽  
pp. 8271-8279 ◽  
Author(s):  
Rania E. Adam ◽  
Mahsa Pirhashemi ◽  
Sami Elhag ◽  
Xianjie Liu ◽  
Aziz Habibi-Yangjeh ◽  
...  
Keyword(s):  
Surface Plasmon Resonance ◽  
Charge Carrier ◽  
Visible Light ◽  
Surface Plasmon ◽  
Plasmon Resonance ◽  
Water Oxidation ◽  
Co Catalyst ◽  
Carrier Separation ◽  
Spr Effect ◽  
Photoelectrochemical Water Oxidation

Ag-based compounds are excellent co-catalyst that can enhance harvesting visible light and increase photo-generated charge carrier separation owing to its surface plasmon resonance (SPR) effect in photoelectrochemical (PEC) applications.

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