An ion exchange mediated shape-preserving strategy for constructing 1-D arrays of porous CoS_1.0365 nanorods for electrocatalytic reduction of triiodide

Abstract

A solution based ion exchange mediated strategy for constructing 1-D arrays of porous CoS1.0365 nanorod film from analogous 1-D array of Co3O4 film derived from pyrolysis of nanostructured cobalt hydroxycarbonate film.

Facile synthesis and promising application of iron‐doped nickel selenide nanoparticles as high‐efficiency counter electrodes of dye‐sensitized solar cells

“…1 In theory, DSSC generally possesses three main parts: photoanode, counter electrode (CE), and electrolyte. [11][12][13][14][15] In special, transition metal compounds and alloys with different metal cations exhibit more redox reaction, higher electroconductivity, and more excellent electrocatalytic activity than corresponding monometallic nanomaterials due to the different cations uniquely coexisted in single crystal structure. 5,6 Although platinum (Pt) compounds such as Pt/PtO x are usually sputtered or pyrolyzed on the conductive glass as CE, 7 the large-scale application is restricted tremendously due to its relatively low reserve and high cost.…”

“…Among them, chalcogenides have equally arisen as a prominent class of CE materials for DSSCs due to their easy fabrication, lost-cost feedstock, and superior electrochemical properties. [11][12][13][14][15] In special, transition metal compounds and alloys with different metal cations exhibit more redox reaction, higher electroconductivity, and more excellent electrocatalytic activity than corresponding monometallic nanomaterials due to the different cations uniquely coexisted in single crystal structure. [16][17][18] For instance, porous cobalt iron chalcogenides (ie, Co-Fe-S and Co-Fe-Se) were designed by Hou's group.…”

Synthesis of nickel and cobalt sulfide nanoparticles using a low cost sonochemical method

“…The phase diagram of the Co-S system is complicated due to the coexistence of strongly reducible cobalt and oxidizable sulfur ion [34]. Cobalt sulfides are reported to have potential applications as catalysts [35, 36], capable of splitting water to produce hydrogen [37], magnetic materials [34, 38], counter electrodes for solar cells [39, 40, 41], anode materials for advanced lithium ion batteries [42, 43, 44] and high-performance supercapacitors [45, 46, 47, 48]. …”

“…More recently, Hoodles et al [35] prepared Co 9 S 8 by heating Co 3 O 4 in a stream of 9.8% H 2 S in H 2 . Milder routes for the synthesis of nanosized cobalt sulfides have been developed during the last decade, like decomposition of cobalt−thiourea complexes [33, 50], wet chemical methods [36, 41, 42], microwave assisted methods [32, 48], and in the first place the hydrothermal/solvothermal method [34, 39, 43, 46, 47, 49, 50, 51, 52]. It should be mentioned that You et al report significant advantages of CoS prepared by a microwave synthesis when compared to counterparts prepared by the solvothermal method [48].…”

Solution‐Based in–situ Synthesis of Transition Metal Sulfides as Efficient Counter Electrodes for Dye‐Sensitized Solar Cells

“…Among these alternatives, transition‐metal compounds including carbides, nitrides, chalcogenides and etc owning attractive electrocatalytic activity have demonstrated excellent performances . Among these compounds, binary metal sulfides (e. g. Ni−S, Co−S, and Mo−S), owning superior electrocatalytic activity, attracted extensive attention due to their morphologic diversity, low price and relatively easy preparation when compared to carbides, nitrides, and selenides. However, most of binary metal sulfides reported as counter electrodes of DSSCs may still be plagued by a time and energy‐consuming fabrication process hindering their further use for large‐scale application .…”