Detection of short-lived intermediates in electrochemical reactions using time-resolved surface-enhanced Raman spectroscopy

Journal Article · Thu Jun 14 00:00:00 EDT 1990 · Journal of Physical Chemistry; (USA)

DOI:https://doi.org/10.1021/j100375a004· OSTI ID:6329682

Shi, Chongtie; Zhang, Wei; Birke, R L; Lombardi, J R ^[1]

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1. The City College of The City Univ. of New York, NY (USA)

p-Nitrobenzoic acid (PNBA) is studied by real-time detection of SERS spectra during time-resolved optical multichannel recording following the application of a double potential step to a Ag electrode. The spectral bands of three stable intermediate products, p-nitrosobenzoate, hydroxylamine, and azoxy compounds are observed. In addition, the transient bands of an unstable intermediate are seen at 996, 1233, and 1580 cm{sup {minus}1} with a lifetime of about 70 ms during the oxidation process of the hydroxylamine compound which itself is generated electrochemically by a 200-ms potential pulse. We suggest these bands represent the p-nitrosobenzoate free-radical anion intermediate formed during the oxidation of the hydroxylamine compound.

• OSTI ID: 6329682
• Journal Information: Journal of Physical Chemistry; (USA), Journal Name: Journal of Physical Chemistry; (USA) Vol. 94:12; ISSN JPCHA; ISSN 0022-3654
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400400* -- Electrochemistry
CHEMICAL REACTIONS
CHEMISTRY
DATA
DATA ANALYSIS
DETECTION
ELECTROCHEMISTRY
EXPERIMENTAL DATA
INFORMATION
MEASURING INSTRUMENTS
MEASURING METHODS
NUMERICAL DATA
REACTION INTERMEDIATES