硫酸水溶液における一酸化窒素，亜硝酸および硝酸の電気化学的挙動

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  • Electrochemical Behavior of Nitrogen Monoxide, Nitrous Acid, and Nitric Acid in Aqueous Sulfuric Acid Solutions
  • リュウサン スイヨウエキ ニ オケル イッサンカ チッソ,アショウサン,オヨビ

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Electrochemical behavior of nitrogen monoxide, nitrous acid, and nitric acid on platinum in aqueous sulfuric acid solutions was investigated using a stationary electrode, a rotating disc electrode (RDE), and a rotating ring disc electrode (RRDE). In 4-5 mol⋅dm-3 sulfuric acid solutions, nitrous acid and nitrogen monoxide were reduced in three and two steps, respectively. An RRDE experiment showed that nitrous acid was reduced mainly to nitrogen monoxide, nitrous oxide, and hydroxylamine in the first, second, and third reduc tion steps, respectively. The RRDE technique was also applied to an investigation of the reaction mechanism of the autocatalytic reduction of nitric acid in the presence of nitrous acid. The Schmid mechanism, which involves the formation of nitrogen monoxide, was confirmed.

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