Time domain hydrogen evolution

Although most of the reported gas-phase experiments do not investigate the temporal evolution of alcohol clusters explicitly, the frequency-domain spectral information can nevertheless be translated into the time domain, making use of some elementary and robust relationships between spectral and dynamical features [289]. According to this, the 10-fs period of the hydrogen-bonded O—H oscillator is modulated and damped by a series of other phenomena. Energy flow into doorway states is certainly slower than for aliphatic C—H bonds [290] but on a time scale of a few picoseconds, energy will nevertheless have... 

Figure 3. Time domain trace resulting from hydrogen evolution at -1700 mV SCE.

Our strategy here was to develop Pt colloids of minimum particle size which would render the water reduction by the electron relay R peirticularly effective. The goal was to obteiin hydrogen evolution rates in the microsecond time domain which would compete with beick electron transfer. First a centrifuged Pt sol protected by polyvinyl alcohol weis employed which gave clear and almost colorless aqueous suspensions even at hi Pt concentrations ( 28). Flash photolysis technique was applied for the first time to study the dynamics of intervention of the Pt particles in the water reduction process. Methylviologen (MV ) wets reduced... 

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