Proton-Coupled Electron Transfer Catalyst: Heterogeneous Catalysis. Application to an Oxygen Evolution Catalyst

ACS Catalysis ◽  
2020 ◽  
Vol 10 (14) ◽  
pp. 7958-7967
Author(s):  
Cyrille Costentin
Keyword(s):  
Electron Transfer ◽  
Heterogeneous Catalysis ◽  
Oxygen Evolution ◽  
Proton Coupled Electron Transfer

Efficient oxygen evolution on hematite at neutral pH enabled by proton-coupled electron transfer

2016 ◽  
Vol 52 (97) ◽  
pp. 14015-14018 ◽  
Author(s):  
Toshihiro Takashima ◽  
Koki Ishikawa ◽  
Hiroshi Irie
Keyword(s):  
Electron Transfer ◽  
Oxygen Evolution ◽  
Transfer Process ◽  
Electron Transfer Process ◽  
Neutral Ph ◽  
Proton Coupled Electron Transfer

The oxygen evolution activity of hematite at neutral pH was enhanced by inducing the concerted proton-coupled electron transfer process.

Proton-coupled electron transfer chemistry of hangman macrocycles: Hydrogen and oxygen evolution reactions

2015 ◽  
Vol 19 (01-03) ◽  
pp. 1-8 ◽  
Author(s):  
Dilek K. Dogutan ◽  
D. Kwabena Bediako ◽  
Daniel J. Graham ◽  
Christopher M. Lemon ◽  
Daniel G. Nocera
Keyword(s):  
Electron Transfer ◽  
Oxygen Evolution ◽  
Coordination Sphere ◽  
High Energy ◽  
Solar Fuels ◽  
Acid Base ◽  
Proton Coupled Electron Transfer ◽  
Secondary Coordination Sphere ◽  
Constituent Elements ◽  
Kinetics Of

The splitting of water into its constituent elements is an important solar fuels conversion reaction for the storage of renewable energy. For each of the half reactions of the oxygen evolution reaction (OER) and hydrogen evolution reaction (HER), multiple protons and electrons must be coupled to avoid high-energy intermediates. To understand the mechanistic details of the PCET chemistry that underpins HER and OER, we have designed hangman porphyrin and corrole catalysts. In these hangman constructs, a pendant acid/base functionality within the secondary coordination sphere is "hung" above the macrocyclic redox platform on which substrate binds. The two critical thermodynamic properties of a PCET event, the redox potential and pKa may be tuned with the macrocycle and hanging group, respectively. This review outlines the synthesis of these catalysts, as well as the examination of the PCET kinetics of hydrogen and oxygen evolution by the hangman catalysts. The insights provided by these systems provide a guide for the design of future HER and OER catalysts that use a secondary coordination sphere to manage PCET.

scholarly journals Electron–Nuclear Dynamics Accompanying Proton-Coupled Electron Transfer

2021 ◽  
Vol 143 (8) ◽  
pp. 3104-3112
Author(s):  
Yusuke Yoneda ◽  
S. Jimena Mora ◽  
James Shee ◽  
Brian L. Wadsworth ◽  
Eric A. Arsenault ◽  
...  
Keyword(s):  
Electron Transfer ◽  
Nuclear Dynamics ◽  
Proton Coupled Electron Transfer

Facile proton-coupled electron transfer enabled by coordination-induced E–H bond weakening to boron

2021 ◽  
Author(s):  
Anthony Wong ◽  
Arunavo Chakraborty ◽  
Deependra Bawari ◽  
Guang Wu ◽  
Roman Dobrovetsky ◽  
...  
Keyword(s):  
Electron Transfer ◽  
Proton Coupled Electron Transfer

Coordination induced bond weakening (CIBW) leads to facile PCET at various E–H bonds.

The electron-transfer intermediates of the oxygen evolution reaction (OER) as polarons by in situ spectroscopy

2021 ◽  
Author(s):  
Hanna Lyle ◽  
Suryansh Singh ◽  
Michael Paolino ◽  
Ilya Vinogradov ◽  
Tanja Cuk
Keyword(s):  
Electron Transfer ◽  
Oxygen Evolution ◽  
Oxygen Evolution Reaction ◽  
Catalytic Reactions ◽  
In Situ Spectroscopy ◽  
Chemical Bonds

The conversion of diffusive forms of energy (electrical and light) into short, compact chemical bonds by catalytic reactions regularly involves moving a carrier from an environment that favors delocalization to one that favors localization.

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