Controlling interfacial electron transfer and electrocatalysis by pH- or ion-switchable DNA monolayer-modified electrodes

2013 ◽  
Vol 4 (3) ◽  
pp. 1137 ◽  
Author(s):  
Gilad Pelossof ◽  
Ran Tel-Vered ◽  
Simcha Shimron ◽  
Itamar Willner
Keyword(s):  
Electron Transfer ◽  
Modified Electrodes ◽  
Interfacial Electron Transfer

scholarly journals Enhanced interfacial electron transfer between thylakoids and RuO2 nanosheets for photosynthetic energy harvesting

2021 ◽  
Vol 7 (20) ◽  
pp. eabf2543
Author(s):  
Hyeonaug Hong ◽  
Jang Mee Lee ◽  
JaeHyoung Yun ◽  
Yong Jae Kim ◽  
Seon Il Kim ◽  
...  
Keyword(s):  
Electron Transfer ◽  
Photosynthetic Apparatus ◽  
Modified Electrodes ◽  
Interfacial Electron Transfer ◽  
Surface Polarity ◽  
Redox Species ◽  
The Past ◽  
Proton Adsorption ◽  
Practical Development ◽  
Photosynthetic Complexes

The harvesting of photosynthetic electrons (PEs) directly from photosynthetic complexes has been demonstrated over the past decade. However, their limited efficiency and stability have hampered further practical development. For example, despite its importance, the interfacial electron transfer between the photosynthetic apparatus and the electrode has received little attention. In this study, we modified electrodes with RuO2 nanosheets to enhance the extraction of PEs from thylakoids, and the PE transfer was promoted by proton adsorption and surface polarity characteristics. The adsorbed protons maintained the potential of an electrode more positive, and the surface polarity enhanced thylakoid attachment to the electrode in addition to promoting ensemble docking between the redox species and the electrode. The RuO2 bioanode exhibited a five times larger current density and a four times larger power density than the Au bioanode. Last, the electric calculators were successfully powered by photosynthetic energy using a RuO2 bioanode.

A Comparison between Interfacial Electron-Transfer Rate Constants at Metallic and Graphite Electrodes

2006 ◽  
Vol 110 (39) ◽  
pp. 19433-19442 ◽  
Author(s):  
William J. Royea ◽  
Thomas W. Hamann ◽  
Bruce S. Brunschwig ◽  
Nathan S. Lewis
Keyword(s):  
Electron Transfer ◽  
Rate Constants ◽  
Transfer Rate ◽  
Interfacial Electron Transfer ◽  
Electron Transfer Rate ◽  
Graphite Electrodes

Electron transport in clay-modified electrodes: study of electron transfer between electrochemically oxidized tris (2,2′-bipyridyl) iron cations and clay structural iron(II) sites

1992 ◽  
Vol 70 (6) ◽  
pp. 1833-1837 ◽  
Author(s):  
Yan Xiang ◽  
Gilles Villemure
Keyword(s):  
Electron Transfer ◽  
Modified Electrodes ◽  
Quantitative Relation ◽  
Cyclic Voltammograms ◽  
Slow Electron ◽  
Cathodic Current ◽  
Peak Current ◽  
Scan Speed ◽  
Anodic Peak Current ◽  
Structural Iron

The cyclic voltammograms of tris (2,2′-bipyridyl) iron(II) ([Fe(bpy)3]2+) adsorbed in clay-modified electrodes made from a range of different smectites were recorded. In all cases, at low scan speed (1 mV/s), the initial anodic peak current was much larger than the initial cathodic peak current. Partial reduction of the clay structural iron further increased the initial anodic to cathodic current ratio, suggesting that the discrepancy between the charge transferred in the anodic and cathodic scans was due to a slow electron transfer between the clay structural Fe(II) and the oxidized bipyridyl cations. However, no clear quantitative relation was found between the measured FeO contents of the different clays and the observed excess anodic currents. In fact, of all the clays tested only one, montmorillonite SWy-1, contained enough Fe(II) for it to account for all of the excess anodic charge transferred in the initial scan.

Autonomous Control of Interfacial Electron Transfer and the Activation of DNA Machines by an Oscillatory pH System

Nano Letters ◽  
2013 ◽  
Vol 13 (10) ◽  
pp. 4920-4924 ◽  
Author(s):  
Xiu-Juan Qi ◽  
Chun-Hua Lu ◽  
Xiaoqing Liu ◽  
Simcha Shimron ◽  
Huang-Hao Yang ◽  
...  
Keyword(s):  
Electron Transfer ◽  
Autonomous Control ◽  
Interfacial Electron Transfer ◽  
Dna Machines

Facilitated proton transfer-electron transfer coupled reactions at thick-film modified electrodes

2017 ◽  
Vol 258 ◽  
pp. 727-734 ◽  
Author(s):  
Franco Martín Zanotto ◽  
Ricardo Ariel Fernández ◽  
Sergio Alberto Dassie
Keyword(s):  
Electron Transfer ◽  
Proton Transfer ◽  
Thick Film ◽  
Modified Electrodes ◽  
Coupled Reactions

Interfacial electron transfer in titanium dioxide colloids

1985 ◽  
Vol 107 (23) ◽  
pp. 6446-6451 ◽  
Author(s):  
Graham T. Brown ◽  
James R. Darwent ◽  
Paul D. I. Fletcher
Keyword(s):  
Electron Transfer ◽  
Titanium Dioxide ◽  
Interfacial Electron Transfer
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