Photoinduced electrochemical reduction of nitrite at an electrochemically roughened silver surface

Journal Article · Thu Aug 05 04:00:00 EDT 1999 · Journal of Physical Chemistry B: Materials, Surfaces, Interfaces, amp Biophysical

DOI:https://doi.org/10.1021/jp990928h· OSTI ID:682070

Zheng, J; Cotton, T M; Chumanov, G ^[1]; Lu, T ^[2]

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1. Iowa State Univ., Ames, IA (United States). Dept. of Chemistry
2. Chinese Academy of Sciences, Changchun (China). Chinese Inst. of Applied Chemistry

Photoelectrochemical reduction of nitrite and nitrate was studied on the surface of an electrochemically roughened silver electrode. The dependence of the photocurrent on photon energy, applied potential, and concentration of nitrite was determined. It was concluded that the photoelectrochemical reduction proceeds via a photoemission process followed by the capture of hydrated electrons by electron acceptors. The excitation of plasmon resonances in nanosize metal structures produced during the roughening procedure resulted in the enhancement of the photoemission process. Ammonia was detected as one of the final products in this reaction. Mechanisms for the photoelectrochemical reduction of nitrite and nitrate are proposed.

• Sponsoring Organization: USDOE, Washington, DC (United States)
• DOE Contract Number: W-7405-ENG-82
• OSTI ID: 682070
• Journal Information: Journal of Physical Chemistry B: Materials, Surfaces, Interfaces, amp Biophysical, Journal Name: Journal of Physical Chemistry B: Materials, Surfaces, Interfaces, amp Biophysical Journal Issue: 31 Vol. 103; ISSN 1089-5647; ISSN JPCBFK
• Country of Publication: United States
• Language: English

Related Subjects

40 CHEMISTRY
ELECTROCHEMISTRY
NITRITES
PHOTOCHEMISTRY
PHOTOCURRENTS
REDUCTION
SILVER
SURFACES