In-situ raman spectroscopic studies on coadsorption of thiourea with anions at silver electrodes

Nucleation and Growth of Metals

“…49,50 An example is an investigation of the orientation of nicotinic acid on silver. 49,50 An example is an investigation of the orientation of nicotinic acid on silver.…”

Immobilization of the [FeFe]-hydrogenase CrHydA1 on a gold electrode: Design of a catalytic surface for the production of molecular hydrogen

“…For this process, rare metals, such as platinum, rhodium, or ruthenium are commonly used as catalysts because of their low overpotentials among the metallic electrocatalysts (Transatti, 1972). The overpotential on other surfaces like Ag, Cu, and Hg can be reduced by the addition of small organic molecules, like 4,4 -bipyridine (Uchida et al, 2008), thiourea (Dayalan and Narayan, 1984;Tian et al, 1990;Bukowska and Jackowska, 1994), pyridine (Hamelin et al, 1990(Hamelin et al, , 1991, or methyl viologen (MV) (Tamamushi and Tanaka, 1987). Still the achieved overpotential is significantly higher than for a platinum electrode.…”

Adsorption and oxidation pathways of thiourea at polycrystalline platinum electrodes

“…Voltamperometric studies have shown the formation of residual sulphur on the surface after TU molecule oxidation [20,21,30,31]. Based on surface enhanced Raman spectroscopy (SERS) results, Tian et al [22] suggested that the changes in the adsorbed TU orientation have a marked effect on H 2 evolution at Ag electrodes. Srinivasan and co-workers have performed Fourier transform SERS studies of TU and some N-substituted TU in different electrolytes to elucidate the structure, orientation and conformation of the surface complexes and the nature of the chemical bonding between the adsorbate and the substrate [19].…”

“…Several electrochemical methods as well as in situ and ex situ spectroscopic techniques have been employed to investigate the adsorption and oxidation reactions of TU on different metals [7,13,[18][19][20][21][22][23][24][25][26][27][28][29]. Voltamperometric studies have shown the formation of residual sulphur on the surface after TU molecule oxidation [20,21,30,31].…”