scholarly journals Front Cover: Photogenerated Electron Transfer Process in Heterojunctions: In Situ Irradiation XPS (Small Methods 9/2020)

Small Methods ◽  
2020 ◽  
Vol 4 (9) ◽  
pp. 2070034
Author(s):  
Peng Zhang ◽  
Yukun Li ◽  
Yongshang Zhang ◽  
Ruohan Hou ◽  
Xilai Zhang ◽  
...  
Keyword(s):  
Electron Transfer ◽  
Transfer Process ◽  
Photogenerated Electron ◽  
Electron Transfer Process ◽  
Front Cover

Photogenerated Electron Transfer Process in Heterojunctions: In Situ Irradiation XPS

Small Methods ◽  
2020 ◽  
Vol 4 (9) ◽  
pp. 2000214 ◽  
Author(s):  
Peng Zhang ◽  
Yukun Li ◽  
Yongshang Zhang ◽  
Ruohan Hou ◽  
Xilai Zhang ◽  
...  
Keyword(s):  
Electron Transfer ◽  
Transfer Process ◽  
Photogenerated Electron ◽  
Electron Transfer Process

scholarly journals On-Line Raman Spectroscopic Study of Cytochromes’ Redox State of Biofilms in Microbial Fuel Cells

Molecules ◽  
2019 ◽  
Vol 24 (3) ◽  
pp. 646 ◽  
Author(s):  
Adolf Krige ◽  
Magnus Sjöblom ◽  
Kerstin Ramser ◽  
Paul Christakopoulos ◽  
Ulrika Rova
Keyword(s):  
Electron Transfer ◽  
Fuel Cells ◽  
Oxidation State ◽  
Transfer Process ◽  
Microbial Fuel Cells ◽  
Redox State ◽  
Raman Peak ◽  
Electron Transfer Process ◽  
On Line

Bio-electrochemical systems such as microbial fuel cells and microbial electrosynthesis cells depend on efficient electron transfer between the microorganisms and the electrodes. Understanding the mechanisms and dynamics of the electron transfer is important in order to design more efficient reactors, as well as modifying microorganisms for enhanced electricity production. Geobacter are well known for their ability to form thick biofilms and transfer electrons to the surfaces of electrodes. Currently, there are not many “on-line” systems for monitoring the activity of the biofilm and the electron transfer process without harming the biofilm. Raman microscopy was shown to be capable of providing biochemical information, i.e., the redox state of C-type cytochromes, which is integral to external electron transfer, without harming the biofilm. In the current study, a custom 3D printed flow-through cuvette was used in order to analyze the oxidation state of the C-type cytochromes of suspended cultures of three Geobacter sulfurreducens strains (PCA, KN400 and ΔpilA). It was found that the oxidation state is a good indicator of the metabolic state of the cells. Furthermore, an anaerobic fluidic system enabling in situ Raman measurements was designed and applied successfully to monitor and characterize G. sulfurreducens biofilms during electricity generation, for both a wild strain, PCA, and a mutant, ΔS. The cytochrome redox state, monitored by the Raman peak areas, could be modulated by applying different poise voltages to the electrodes. This also correlated with the modulation of current transferred from the cytochromes to the electrode. The Raman peak area changed in a predictable and reversible manner, indicating that the system could be used for analyzing the oxidation state of the proteins responsible for the electron transfer process and the kinetics thereof in-situ.

scholarly journals Photoelectrochemical response of carbon dots (CDs) derived from chitosan and their use in electrochemical imaging

2018 ◽  
Vol 5 (3) ◽  
pp. 423-428 ◽  
Author(s):  
De-Wen Zhang ◽  
Nikolaos Papaioannou ◽  
Naomi Michelle David ◽  
Hui Luo ◽  
Hui Gao ◽  
...  
Keyword(s):  
Electron Transfer ◽  
Transfer Process ◽  
Carbon Dots ◽  
Photogenerated Electron ◽  
Electron Transfer Process ◽  
Photoelectrochemical Response ◽  
Electrochemical Imaging

Direct photoelectrochemical response of carbon dots (CDs) was attributed to a photogenerated electron-transfer process by CDs under illumination.

In Situ Assembly of Bimetallic MOF Composites on IF as Efficient Electrocatalysts for Oxygen Evolution Reaction

2021 ◽  
Author(s):  
Yeqing Zhang ◽  
Jinlei Wang ◽  
Lei Ye ◽  
Meilin Zhang ◽  
Yaqiong Gong
Keyword(s):  
Electron Transfer ◽  
Oxygen Evolution ◽  
Transfer Process ◽  
Oxygen Evolution Reaction ◽  
Electron Transfer Process ◽  
Slow Kinetics ◽  
Decomposition Of Water

Since the complicated multiple electron transfer process and slow kinetics in the OER process seriously hinder the electrochemical decomposition of water, it is urgent to design and develop electrocatalyst with...

Thionine–graphene oxide covalent hybrid and its interaction with light

2017 ◽  
Vol 19 (22) ◽  
pp. 14412-14423 ◽  
Author(s):  
Ewelina Krzyszkowska ◽  
Justyna Walkowiak-Kulikowska ◽  
Sven Stienen ◽  
Aleksandra Wojcik
Keyword(s):  
Electron Transfer ◽  
Graphene Oxide ◽  
Excited State ◽  
Transfer Process ◽  
Singlet Excited State ◽  
Functionalized Graphene ◽  
Electron Transfer Process ◽  
Functionalized Graphene Oxide ◽  
Back Electron Transfer

Quenching of the thionine singlet excited state in covalently functionalized graphene oxide with an efficient back electron transfer process.

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