PMID- 24144120
OWN - NLM
STAT- MEDLINE
DCOM- 20141024
LR  - 20151119
IS  - 1520-5126 (Electronic)
IS  - 0002-7863 (Linking)
VI  - 135
IP  - 44
DP  - 2013 Nov 6
TI  - Decoupling interfacial reactions between plasmas and liquids: charge transfer vs 
      plasma neutral reactions.
PG  - 16264-7
LID - 10.1021/ja407149y [doi]
AB  - Plasmas (gas discharges) formed at the surface of liquids can promote a complex 
      mixture of reactions in solution. Here, we decouple two classes of reactions, 
      those initiated by electrons (electrolysis) and those initiated by gaseous 
      neutral species, by examining an atmospheric-pressure microplasma formed in 
      different ambients at the surface of aqueous saline (NaCl) solutions. 
      Electrolytic reactions between plasma electrons and aqueous ions yield an excess 
      of hydroxide ions (OH(-)), making the solution more basic, while reactions 
      between reactive neutral species formed in the plasma phase and the solution lead 
      to nitrous acid (HNO2), nitric acid (HNO3), and hydrogen peroxide (H2O2), making 
      the solution more acidic. The relative importance of either reaction path is 
      quantified by pH measurements, and we find that it depends directly on the 
      composition of the ambient background gas. With a background gas of oxygen or 
      argon, electron transfer reactions yielding excess OH(-) dominate, while HNO2 and 
      HNO3 formed in the plasma and by the dissolution of nitrogen oxide (NOx) species 
      dominate in the case of air and nitrogen. For pure nitrogen (N2) gas, we observe 
      a unique coupling between both reactions, where oxygen (O2) gas formed via water 
      electrolysis reacts in the bulk of the plasma to form NOx, HNO2, and HNO3.
FAU - Rumbach, Paul
AU  - Rumbach P
AD  - Department of Aerospace and Mechanical Engineering, University of Notre Dame , 
      Notre Dame, Indiana 46556, United States.
FAU - Witzke, Megan
AU  - Witzke M
FAU - Sankaran, R Mohan
AU  - Sankaran RM
FAU - Go, David B
AU  - Go DB
LA  - eng
PT  - Journal Article
PT  - Research Support, Non-U.S. Gov't
PT  - Research Support, U.S. Gov't, Non-P.H.S.
DEP - 20131024
PL  - United States
TA  - J Am Chem Soc
JT  - Journal of the American Chemical Society
JID - 7503056
RN  - 0 (Gases)
RN  - 0 (Solutions)
RN  - 059QF0KO0R (Water)
RN  - 451W47IQ8X (Sodium Chloride)
SB  - IM
MH  - Atmospheric Pressure
MH  - Electrons
MH  - Gases/*chemistry
MH  - Hydrogen-Ion Concentration
MH  - Sodium Chloride/*chemistry
MH  - Solutions
MH  - Surface Properties
MH  - Water/chemistry
EDAT- 2013/10/23 06:00
MHDA- 2014/10/25 06:00
CRDT- 2013/10/23 06:00
PHST- 2013/10/23 06:00 [entrez]
PHST- 2013/10/23 06:00 [pubmed]
PHST- 2014/10/25 06:00 [medline]
AID - 10.1021/ja407149y [doi]
PST - ppublish
SO  - J Am Chem Soc. 2013 Nov 6;135(44):16264-7. doi: 10.1021/ja407149y. Epub 2013 Oct 
      24.