TY - JOUR
T1 - In Situ Fourier Transform Infrared Spectroscopic Studies of Nitrite Reduction on Platinum Electrodes in Perchloric Acid
AU - Bae, In Tae
AU - Barbour, Rachael L.
AU - Scherson, Daniel Alberto
PY - 1997/1/1
Y1 - 1997/1/1
N2 - Nitrous oxide generated by the electrochemical reduction of nitrite on a polycrystalline platinum electrode in aqueous 0.1 M HClO4 was monitored by in situ potential difference Fourier transform infrared reflection absorption spectroscopy. An analysis of the intensity of the N2O asymmetric stretch band at 2231 cm-1, A(N2O), monitored during a slow linear potential (E) sweep in the range 0.8 > E > -0.32 V vs SCE, indicated that N2O begins to form at E ∼0.5 V vs SCE, reaches a maximum at E ∼0.05 V, and disappears completely for E < -0.1 V. These observations are in agreement with those made by on-line mass spectrometry (MS) using high-area Pt electrodes in acid electrolytes reported in the literature. In addition, a plot of A(N2O) vs E was found to be directly correlated with that of the integral of the N2O generation rate, as measured by on-line dynamic differential electrochemical MS (DEMS) by Nishimura et al. (Electrochim. Acta 1991, 36, 877) in sulfuric acid solutions.
AB - Nitrous oxide generated by the electrochemical reduction of nitrite on a polycrystalline platinum electrode in aqueous 0.1 M HClO4 was monitored by in situ potential difference Fourier transform infrared reflection absorption spectroscopy. An analysis of the intensity of the N2O asymmetric stretch band at 2231 cm-1, A(N2O), monitored during a slow linear potential (E) sweep in the range 0.8 > E > -0.32 V vs SCE, indicated that N2O begins to form at E ∼0.5 V vs SCE, reaches a maximum at E ∼0.05 V, and disappears completely for E < -0.1 V. These observations are in agreement with those made by on-line mass spectrometry (MS) using high-area Pt electrodes in acid electrolytes reported in the literature. In addition, a plot of A(N2O) vs E was found to be directly correlated with that of the integral of the N2O generation rate, as measured by on-line dynamic differential electrochemical MS (DEMS) by Nishimura et al. (Electrochim. Acta 1991, 36, 877) in sulfuric acid solutions.
UR - http://www.scopus.com/inward/record.url?scp=0142254225&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0142254225&partnerID=8YFLogxK
U2 - 10.1021/ac960769n
DO - 10.1021/ac960769n
M3 - Article
AN - SCOPUS:0142254225
SN - 0003-2700
VL - 69
SP - 249
EP - 252
JO - Analytical chemistry
JF - Analytical chemistry
IS - 2
ER -