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Pyrrhotite is a sulphurous stone that is present mainly in the Mauricie region which strongly reacts to humidity, air and oxygen. The oxidation reaction of this extremely harmful granulate causes an expansion within the concrete creating large cracks to foundations and other concrete structures.
which can be readily supplied in large quantities at low cost Teel et al., 2011 Yan et al., 2015. In this work, natural pyrrhotite NP, Fe1-xS is suggested to be a good catalyst to effectively activate PS PMS for water treatment the great involvement of Fe2 in NP is benecial for PS activation and the leached Fe ions are environ-
View 0 peer reviews of Highly Active Fe Sites in Ultrathin Pyrrhotite Fe7S8 Nanosheets Realizing Efficient Electrocatalytic Oxygen Evolution on Publons Download Web of Science My Research Assistant Bring the power of the Web of Science to your mobile device, wherever inspiration strikes.
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With features of reliable structure, high working efficiency and easy adjustment. read more get price. Sand Maker. VSI sand maker, also called VSI crusher, is the major machine for sand making plant. read more get price. latest amp news Of compound pyrrhotite crusher pyrrhotite crusherrock. large pyrrhotite roll crusher in Manchester Britain Europe
sulfide minerals and pyrrhotite, including cyanide, lime, calcium hypochlorite, potassium permanganate, sulfite, sodium sulfide and sodium carbonate Qiu et al., 2011. Studies have indicated that the depressant cyanide shows the best inhibition efficiency in the flotation separation of copper sulfide minerals and pyrrhotite.
Progress over the past decades in proton-conducting materials has generated a variety of polyelectrolytes and microporous polymers. However, most studies are still based on a preconception that large pores eventually cause simply flow of proton carriers rather than efficient conduction of proton ions, which precludes the exploration of large-pore polymers for proton transport.
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economy is an efficient large scale energy storage technology such as the formation of fuels out of abundant and recyclable resources powered by electrical energy.3,4 In this regard, electrocatalytic water splitting can be utilized to yield the carbon-neutral fuel hydrogen from electricity and water.
May 31, 2006 The sulfide droplets are found in a varitextured gabbronorite the local term for this is a taxitic gabbro. The droplets are 13 cm in size Fig. 1a with the upper two thirds of each droplet consisting of an intergrowth of cubanite and chalcopyrite with elongate exsolutions of pyrrhotite 0.02 0.1 mm Fig. 1b. The lower portion of the droplets consists of pyrrhotite with very small 0 ...
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Pyrrhotite is an unstable iron sulfide found in some aggregates its oxidation in concrete has devastating effects on the concrete-based infrastructure. ... Tailoring Cementitious Materials Towards Value-Added Use of Large CO2 Volumes. ... Concrete is the primary material of construction. The challenges relating to the health, efficiency, and ...
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Apr 23, 2020 The results achieved from the FTIR spectra of pyrrhotite ash before and after RR141 adsorption are shown in Fig. 2 a and b, respectively. After adsorption, we noticed intense and large peaks. The broad peak at 3411 cm 1 refers to OH stretching vibration Jain and Gogate, 2018 that shifted to 3477 cm 1 after RR141 adsorption.
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Dec 15, 2020 In addition, pyrrhotite Fe 7 S 8 nanosheets exhibit the most efficient Fe-based electrocatalyst for OER , which proved that Fe is an efficient active site for electrocatalytic water splitting. Although several iron sulfides have been used as electrocatalysts for water splitting, they must grow on iron or nickel foam to enhance their catalytic ...
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suppress pyrrhotite floatability 73, introducing separate pyrrhotite rejection circuits which by and large also exploit the fact that pyrrhotite floats poorly in alkaline solutions, and using magnetic separation to remove pyrrhotite from feed or concentrate streams 74, 75. These measures made significant improvements. For example, the ...
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Apr 16, 2020 Herein a general synthesis of highly dispersed pyrrhotite Fe 1 x S nanoparticles embedded in hierarchically porous nitrogendoped carbon spheres Fe 1 x SNC is proposed. Fe 1 x SNC has a high specific surface area 627 m 2 g 1 , large pore volume 0.41 cm 3 g 1 , and enhanced adsorption and electrocatalytic transition ...
Aug 17, 2021 A large contrast in the remanence acquisition efficiency of awaruite and pyrrhotite grains can potentially explain our key observation that only the latter population carries the MT component. We therefore conducted ARM, partial TRM, and PRM acquisition experiments on Fe-sulfide and FeNi assemblages.
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Dec 15, 2020 In addition, pyrrhotite Fe 7 S 8 nanosheets exhibit the most efficient Fe-based electrocatalyst for OER , which proved that Fe is an efficient active site for electrocatalytic water splitting. Although several iron sulfides have been used as electrocatalysts for water splitting, they must grow on iron or nickel foam to enhance their catalytic activity 20 , 27 , 28 .
Oct 24, 2017 As expected, the ultrathin Fe7S8 nanosheets exhibit promising electrocatalytic oxygen evolution activities, with a low overpotential of 0.27 V and a large current density of 300 mA cm-2 at 0.5 V. This work provides solid evidence that Fe could be an efficient active site for electrocatalytic water splitting. Read Article at publishers site
Feb 19, 2020 efficiency of LSBs are challenging to resolve. Herein a general synthesis of highly dispersed pyrrhotite Fe 1xS nanoparticles embedded in hierar-chically porous nitrogen-doped carbon spheres Fe 1xS-NC is proposed. Fe 1xS-NC has a high specific surface area 627 m
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