On the basis of different types of experiments, the authors develop implicitly the model of surface-enhanced Raman scattering (SERS) of adsorbates on metal surfaces. The long-range enhancement by resonances of the macroscopic laser and Stokes field is separated quantitatively from the metal electron-mediated resonance Raman effect. The latter mechanism proceeds by increased electron-photon coupling at an atomically rough surface and by temporary charge transfer to orbitals of the adsorbates. This model can account for the chemical specificity and vibrational selectivity of SERS and (partly) for the SERS specificity of the various metals.

https://iopscience.iop.org/article/10.1088/0953-8984/4/5/001/pdf

Surface-enhanced Raman scattering

The oxidation of small organic molecules: A survey of recent fuel cell related research

Non-faradaic electrochemical modification of catalytic activity: A status report

Electrochemical Reaction Dynamics - A Review

https://link.springer.com/content/pdf/10.1016%2Fj.jasms.2004.09.011.pdf

Differential electrochemical mass spectrometry.

The invention relates to a rechargeable electrochemical cell with a negative electrode that contains an active metal in the charged state that is selected from the group consisting of the alkali metals, alkaline earth metals and the metals of the second subgroup of the periodic system, a sulfur dioxide based electrolyte solution and a positive electrode that contains the active metal and that discharges ions into the electrolyte solution when the cell is recharged. The negative electrode undergoes a self-discharge reaction in which the sulfur dioxide of the electrolyte solution reacts with the active metal of the negative electrode, giving a hardly soluble compound. According to the invention, the electrochemical charge of the sulfur dioxide, calculated by one Faraday per mole of sulfur dioxide, in the cell is smaller than the electrochemically equivalent charge of the active metal that can be theoretically stored in the positive electrode.

Rechargeable electrochemical cell

On the anodic oxidation of formaldehyde on Pt, Au and Pt/Au-alloy electrodes in alkaline solution

The present invention relates to a high-current battery system (1) in which a high operating current flows, in particular for vehicle drives. The high-current battery system (1) has a battery system monitoring electronics unit (12) and a plurality of battery modules (4), each module including at least one rechargeable battery cell (10) and being electrically connected in series by means of an operating current line (5) such that an operating current flows through the operating current line (5) during operation. At least one of the battery modules (4) is designed as a bypass battery module (6) which comprises a bypass switch (7) and a bypass line (8), which are designed and disposed such that the battery module (6) is electrically bridged by the bypass line (8) after the bypass switch (7) is switched from a normal operating position into a bypass position, so that the operating current flows through the bypass line (8). For each bypass battery module (6), the battery system monitoring electronics unit (12) incorporates a module monitoring unit (11) which monitors the associated battery module (6) and detects a fault state of the module (6). Upon detection of a fault state of a battery module (6) by one of the module monitoring units (11), the battery system monitoring electronics unit (12) measures the current flow in the operating current line (5) and switches the bypass switch (7) of the battery module (6) in question from the normal operating position into the bypass position at a time at which the current flow in the operating current line (5) is less than a predetermined limit value.

Joachim Heitbaum

Papers

Rechargeable electrochemical cell

On the anodic oxidation of formaldehyde on Pt, Au and Pt/Au-alloy electrodes in alkaline solution

High-current battery system and method for controlling a high-current battery system

On the potential dependence of the CN stretch frequency on Au electrodes studied by SERS

DEMS as a tool for the investigation of dynamic processes: galvanostatic formic acid oxidation on a Pt electrode