| Summary: | 碩士 === 國立成功大學 === 化學工程研究所 === 82 === The content of this thesis is majorly divided into two parts.
The electrochemical behavior and the current efficiency (C.
E.) of hypochlorite production on binary RuO2-based
electrodes are studied in the first part. In the second part,
the effects of el- ectrolysis condition on the C.E. of
hypochlorite production and the appliction of this oxidant
in a salting dye-manufacturing wastewater are investigated.
For (Ru+Pt)Ox system , the amount of nonstoichiometric sites
distributed among the oxide film is increased by the presence
of PtOx in RuO2. The electrochemically active surface area
(EASA, q* ) accordingly increases with increasing the addition
of PtOx, and a maxium q* of (Ru+Pt)Ox , about four times of
that of the pure RuO2, occurs at ca. 60∼80 mol% Pt content in
the coating solut- ions. Since PtOx is an inhibitor for
oxygen evolution reaction (OER), the rates of OER on the
oxide films with 20 and 40 mol% Pt content are slower than that
on a pure RuO2, while this reaction is obviously enhanced by
the presence of PtOx at 60∼80 mol% in RuO2. For (Ru+Sn)O2
system, a maxium value of q* exists on the oxide with 20
mol% Sn content, and the amounts of EASA on those oxides with
Sn content between 40, 60 and 80 mol% are approxima- tely the
same. The sequence of oxides with decreasing Cl2 evolut- ion
rate is RuO2 with Sn content equal to 20>40≒60≒80 mol%. The
activity of RuO2 with 20 mol% Sn content for OER is higher
than that of pure RuO2 but contrary trend is found for the
oxides with 40∼80 mol% Sn content. For (Ru+Ti)O2 system,q* and
the activites for OER and chlorine evolution reaction (CER)
decrease with creasing the TiO2 content in RuO2 films.
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