scholarly journals Poisoning Effect of CO: How It Changes Hydrogen Electrode Reaction and How to Analyze It Using Differential Polarization Curve

Catalysts ◽  
2021 ◽  
Vol 11 (11) ◽  
pp. 1322
Author(s):  
Osami Seri ◽  
Kazunao Furumata
Keyword(s):  
Polarization Curve ◽  
Polarization Resistance ◽  
Electrode Reaction ◽  
Resistance Curve ◽  
H2so4 Solution ◽  
Hydrogen Electrode ◽  
Pt Electrode ◽  
Poisoning Effect ◽  
Co Gas

Abstract: The hydrogen electrode reaction (HER) on Pt electrode in a H2SO4 solution when CO gas was injected/stopped was studied using polarization resistance curve [...]

Volumes of activation for electrode processes of various charge-types in nonaqueous solvents

2001 ◽  
Vol 79 (12) ◽  
pp. 1864-1869 ◽  
Author(s):  
Mitsuru Matsumoto ◽  
Delanie Lamprecht ◽  
Michael R North ◽  
Thomas W Swaddle
Keyword(s):  
Electron Transfer ◽  
Reaction Rate ◽  
Electrode Reaction ◽  
State Theory ◽  
Exchange Reactions ◽  
Pt Electrode ◽  
Electrode Processes ◽  
Solvent Dynamics ◽  
The Mean ◽  
Dynamical Control

Volumes of activation (ΔV‡el) are reported for electron transfer at a Pt electrode of Mn(CN-cyclo-C6H11)62+/+ in acetonitrile, acetone, methanol, and propylene carbonate, and of Fe(phen)33+/2+ in acetonitrile. In all cases, ΔV‡el is markedly positive, whereas for the homogeneous self-exchange reactions of these couples in the same solvents the corresponding parameter is known to be strongly negative. The rate constants for the electrode reactions correlate loosely with the mean reactant diffusion coefficients (i.e., with solvent fluidity) and the ΔV‡el values with the volumes of activation for diffusion (i.e., for viscous flow), consistent with solvent dynamical control of the electrode reaction rate in organic solvents. A detailed analysis of ΔV‡el values of the kind presented for a couple with an uncharged member (Zhou and Swaddle, Can. J. Chem. 79, 841 (2001)) fails, however, either because of ion-pairing effects with these more highly charged couples or because of breakdown of transition-state theory in predicting the contribution of the activational barrier. Attempts to measure ΔV‡el for the oxidation of the uncharged molecule ferrocene at various electrodes in acetonitrile were unsuccessful, although ΔV‡el was again seen to be clearly positive.Key words: electrode kinetics, volumes of activation, nonaqueous electron transfer, solvent dynamics.

scholarly journals Reaction Route of Hydrogen Electrode Reaction on Platinum

1990 ◽  
Vol 58 (1) ◽  
pp. 41-48 ◽  
Author(s):  
Hideaki KITA ◽  
Shen YE ◽  
Akiko ARAMATA
Keyword(s):  
Electrode Reaction ◽  
Hydrogen Electrode ◽  
Reaction Route

Hydrogen electrode reaction on electrodes of glassy carbon-supported ultrafine Pd particles in alkaline media

1992 ◽  
Vol 37 (13) ◽  
pp. 2427-2432 ◽  
Author(s):  
Naokazu Tateishi ◽  
Kiyochika Yahikozawa ◽  
Katsunori Nishimura ◽  
Yoshio Takasu
Keyword(s):  
Glassy Carbon ◽  
Electrode Reaction ◽  
Alkaline Media ◽  
Hydrogen Electrode
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