Oxygen reduction at sulphide minerals. 1. A rotating ring disc electrode (RRDE) study at galena and pyrite

What Can We Learn in Electrocatalysis, from Nanoparticulated Precious and/or Non-Precious Catalytic Centers Interacting with Their Support?

“…Similar results on galena and pyrite materials were observed by Ahlberg et al [99]. The authors found 25%-30% H2O2 production at the disk electrode.…”

“…As a result of this effect, an increase in the total number of electrons, and a decrease in the hydrogen peroxide was detected at the ring electrode. Similar results on galena and pyrite materials were observed by Ahlberg et al [99]. The authors found 25%-30% H 2 O 2 production at the disk electrode.…”

Theoretical study of the surface energy and electronic structure of pyrite FeS2 (100) using a total-energy pseudopotential method, CASTEP

“…The first electron transfer was found to be the rate-determining step for oxygen reduction on pyrite [29]. Oxygen reduction on pyrite has been explained on the basis of mediation of charge transfer by the surface state, and electron transfer between the surface state and O 2 in the electrolyte was the rate-determining step [30].…”

Electrochemical synthesis of FeS2 thin film: An effective material for peroxide sensing and terephthalic acid degradation

“…Among the natural iron sulfide minerals, mackinawite is paramagnetic; pyrrhotite and greigite are ferromagnetic; and troilite is antiferromagnetic; pyrite and marcasite are diamagnetic [2e4]. FeS 2 (pyrite) is widely used as absorber material in thin film solar cells [5,6], photovoltaic and photoelectrochemical cells [7e9] energy convertor [5], electrocatalyst [10] and photocatalyst [11,12]. The material is being extensively used as a possible alternative absorber material for high optical absorption coefficient [13] (a > 10 5 cm À1 ) and sufficient minority carrier diffusion length [14] (100e1000 nm) may be responsible for its potential photocatalytic activity.…”