TY - JOUR
T1 - Vibrational analysis of interfacial phosphate equilibria
AU - Paulissen, Vicki Berger
AU - Korzeniewski, Carol
N1 - Funding Information:
Portions of this work were supportedb y a grant from the RackhamF oundation of The University of Michigan. C.K. gratefully acknowledgess upport from the Cammille& Henry Dreyfus FoundationD istinguishedN ew Faculty Programa nd a Dow Corning AssistantP rofessorship.
PY - 1990/9/10
Y1 - 1990/9/10
N2 - Potential dependent changes in pH were observed at the platinum/solution interface by monitoring changes in the equilibrium concentration of phosphates using infrared spectroscopy. The pH at the platinum/solution interface was observed to decrease with increasing positive potentials in alkaline solutions. At potentials in the oxide region of platinum, changes in the composition of bulk solution arise owing to the formation of surface oxides. The potential dependent pH changes observed in these studies are consistent with theories concerning the interfacial properties of hydrogen adsorbing metals. Such potential dependent pH changes may have important consequences when studying the electrochemical reactivity of compounds which are sensitive to pH.
AB - Potential dependent changes in pH were observed at the platinum/solution interface by monitoring changes in the equilibrium concentration of phosphates using infrared spectroscopy. The pH at the platinum/solution interface was observed to decrease with increasing positive potentials in alkaline solutions. At potentials in the oxide region of platinum, changes in the composition of bulk solution arise owing to the formation of surface oxides. The potential dependent pH changes observed in these studies are consistent with theories concerning the interfacial properties of hydrogen adsorbing metals. Such potential dependent pH changes may have important consequences when studying the electrochemical reactivity of compounds which are sensitive to pH.
UR - http://www.scopus.com/inward/record.url?scp=0025488840&partnerID=8YFLogxK
U2 - 10.1016/0022-0728(90)87429-N
DO - 10.1016/0022-0728(90)87429-N
M3 - Article
AN - SCOPUS:0025488840
SN - 0022-0728
VL - 290
SP - 181
EP - 189
JO - Journal of Electroanalytical Chemistry
JF - Journal of Electroanalytical Chemistry
IS - 1-2
ER -