Js. Do et Cp. Chen, INSITU OXIDATIVE-DEGRADATION OF FORMALDEHYDE WITH ELECTROGENERATED HYDROGEN-PEROXIDE, Journal of the Electrochemical Society, 140(6), 1993, pp. 1632-1637
The factors affecting the cathodic reduction of oxygen to hydrogen per
oxide and the degradation of formaldehyde using in situ generated hydr
ogen peroxide are presented in this work. The current efficiency for t
he production of hydrogen peroxide on graphite has been indicated by t
he experimental results to have been significantly affected by the pH
value, the current density, the temperature, and the oxygen sparging r
ate. The maximum current efficiency for the cathodic reduction of oxyg
en to hydrogen peroxide was 93.5%. The degradation of formaldehyde by
the electrogenerated hydrogen peroxide was primarily governed by the c
urrent density, the pH value, and the temperature. The degradation fra
ction of formaldehyde was more than 99% whenever the initial concentra
tion of formaldehyde was in the range of 250 to 1000 ppm.