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000053213 084__ $$2WoS$$aElectrochemistry
000053213 1001_ $$0P:(DE-Juel1)VDB22265$$aPronkin, S.$$b0$$uFZJ
000053213 245__ $$aElectrocatalytical properties of Au(111-25nm) - Pd quasi-single crystal film electrodes as probed by ATR-SEIRAS
000053213 260__ $$aMoscow$$bMAIK Nauka/Interperiodica Publ.$$c2006
000053213 300__ $$a1177 - 1192
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000053213 440_0 $$05387$$aRussian Journal of Electrochemistry$$v42$$x1023-1935$$y11
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000053213 520__ $$aElectrochemical and electrocatalytic properties of thin films Au(111-25 nm), which are quasi-single-crystal electrodes 25 nm thick made of gold with the (I 11) preferential orientation, and same electrodes modified with a monolayer (ML) of palladium are studied in 0.1 M solutions of HClO4 and H2SO4 employing voltammetric techniques and surface enhanced infrared reflection absorption spectroscopy (ATR-SEIRAS). Spectroscopic experiments demonstrate strong adsorption of electrolyte species (H2O, OHads, anions) on the Pd surface. The weak and reversible adsorption of CO on Au(111-25 nm) does not change the interfacial-water structure. Adsorption of CO on the Pd-modified film results in an irreversibly adsorbed CO adlayer stabilized by co-adsorbed isolated water species. Various electrooxidation mechanisms are discussed. Electrochemical and spectroscopic investigations on the adsorption and electrooxidation of HCOOH on bare and I ML Pd-Au(111-25 nm) electrodes reveal that electrooxidation proceeds in both cases via a direct or dehydrogenation pathway. This mechanism involves the formation of formate as intermediate, which is detected by in situ ATR-SEIRAS. The reactivity on Pd-modified surfaces is higher than on bare gold. The specifically adsorbed anions (sulfate/bisulfate) and the oxide formation on the substrate surface lower the reactivity for CO and HCOOH on both surfaces.
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000053213 650_7 $$2WoSType$$aJ
000053213 65320 $$2Author$$aSEIRAS
000053213 65320 $$2Author$$aquasi-single-crystal Au(111-25 nm) films
000053213 65320 $$2Author$$apalladium
000053213 65320 $$2Author$$ainterfacial water
000053213 65320 $$2Author$$acarbon monoxide
000053213 65320 $$2Author$$aformic acid
000053213 65320 $$2Author$$aadsorption
000053213 65320 $$2Author$$aelectrooxidation
000053213 7001_ $$0P:(DE-Juel1)VDB17031$$aHara, M.$$b1$$uFZJ
000053213 7001_ $$0P:(DE-Juel1)VDB9859$$aWandlowski, Th.$$b2$$uFZJ
000053213 773__ $$0PERI:(DE-600)2058211-0$$a10.1134/S1023193506110048$$gVol. 42, p. 1177 - 1192$$p1177 - 1192$$q42<1177 - 1192$$tRussian journal of electrochemistry$$v42$$x1023-1935$$y2006
000053213 8567_ $$uhttp://dx.doi.org/10.1134/S1023193506110048
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000053213 9141_ $$y2006
000053213 915__ $$0StatID:(DE-HGF)0010$$aJCR/ISI refereed
000053213 9201_ $$0I:(DE-Juel1)VDB43$$d31.12.2006$$gISG$$kISG-3$$lInstitut für Grenzflächen und Vakuumtechnologien$$x0
000053213 9201_ $$0I:(DE-Juel1)VDB381$$d14.09.2008$$gCNI$$kCNI$$lCenter of Nanoelectronic Systems for Information Technology$$x1$$z381
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