Direct reduction of nitrite to N2 on a Pt(100) electrode in alkaline media
Matteo Duca1, Mar Oroval Cucarella, Paramaconi Rodriguez
1Leiden Institute of Chemistry, Leiden University, P.O. Box 9502, 2300 RA Leiden, The Netherlands. m.duca@chem.leidenuniv.nl
Abstract:
The selective reduction of NO(2)(-) to N(2) in 0.1 M NaOH was obtained at a Pt(100) electrode in a narrow but distinct potential region. This is the first report of such selectivity for this reaction on Pt(100), which is known to be the most catalytically active platinum surface toward NO(2)(-) reduction in alkaline media. Both ammonia and nitrous oxide are ruled out as possible reaction intermediates on the basis of online electrochemical mass spectrometry. Based on earlier work on ammonia oxidation, NH(2) adsorbates are speculated to be involved in the reaction mechanism.
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