The use of thin silver films for the detection of low concentrations of hydrogen sulphide

Mass and electron-transfer conditions for the electrochemical oxidation of hydrogen sulfide at vanadium pentoxide film modified electrode

“…Metal oxide catalysts, such as the oxides of aluminum, vanadium, titanium, iron, alkaline earth and rare earth elements [17][18][19][20], have shown a great industrial importance particularly in the catalytic oxidation of H 2 S. Vanadium pentoxide (V 2 O 5 ) among other metal oxides exhibited a greater reactivity and selectivity towards the oxidation of H 2 S into elemental sulfur [21,22]. In the previous study [23], it was reported that the overpotential of sulfide oxidation at V 2 O 5 film modified electrode (V 2 O 5 -ME) decreased substantially by 500 mV compared with that of the unmodified electrode of similar base material.…”

The catalytic activity of vanadium pentoxide film modified electrode on the electrochemical oxidation of hydrogen sulfide in alkaline solutions

“…This is achieved by the attachment of a catalytic species to the surface of a base electrode (bare metallic [21], metal oxides [22], glassy carbon [23], electropolymerized sensing film [24], alloys [25], etc.) which enhances its electrochemical activity.…”

Oddy Tests: Adding the Analytical Dimension

“…Wang et al (2011) also proposed a unified visual digital analysis system in order to solve the problem of subjective visual analysis. To increase test sensitivity, some used alternative materials to the Cu, Pb, and Ag metal coupons (Collings and Young 1976, Hawkins et al 1998, Chen et al 2007, Wang et al 2011. For example, current protocols for the photographic activity test (PAT) as performed by the Image Permanence Institute (2015) may be described as a development of the setup published by Collings and Young (1976).…”