Abstract
The rates of evolution of nitrogen produced by the reduction of manganese dioxide samples with hydrazine (N 2H 4) generally increased as their surface area increased and as the particle size decreased. The rate of reduction was parallel to the rate of catalytic decomposition of hydrogen peroxide (H 2O 2), as measured by the rate of oxygen evolution. The results suggest a parallel between the electrochemical and the catalytic activities of the dioxide samples. For samples doped with Co 2+, Fe 3+ or Ga 3+ ions, the rate of reduction with N 2H 4 was lower than that for the undoped sample. However, the rate of decomposition of the H 2O 2 catalysed by the doped samples was higher than the corresponding rate for the undoped sample.
Published Version
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