Dye-sensitized photocatalytic hydrogen evolution by using copper-based ternary refractory metal chalcogenides

Genc, Eminegül; Coskun, Halime; Yanalak, Gizem; Aslan, Emre; Özel, Faruk

doi:10.1016/j.ijhydene.2020.04.080

Cited by 18 publications

(9 citation statements)

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“…Therefore, we further study the optical properties of the hydrogenated FeS 2 with cubic and orthorhombic structures. In this work, two optical parameters: the adsorption coefficient and energy loss function are studied 73‐75 . Figure 6 shows the calculated adsorption spectrum of the hydrogenated Pa‐3 and Pmnn FeS 2 .…”

Section: Resultsmentioning

confidence: 99%

First‐principles investigation of electronic and optical properties of H‐doped FeS ₂

Pan

2021

Int J Energy Res

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Summary Although the FeS2 is a promising electrocatalyst for hydrogen storage, the electronic and optical properties of the hydrogenated FeS2 are unclear. To solve these problems, we apply the first‐principles calculations to study the hydrogenated behavior, electronic and optical properties of H‐doped FeS2. The results show that the hydrogen is easy to store in cubic FeS2 compared to the orthorhombic FeS2. The reason is that the large interstice of cubic structure can enhance the interaction between H and FeS2. The narrow band gap of FeS2 improves the electronic transfer and enhances the catalytic activity. The hydrogenated FeS2 shows the strong electronic interaction between H and FeS2. The electronic structure shows that the hydrogenated FeS2 is attributed to the formation of H‐S and H‐Fe bonds. Finally, the adsorption spectrum affirms that the hydrogenated cubic FeS2 improves the electronic jump between the occupied state and the empty state.

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Section: Resultsmentioning

confidence: 99%

First‐principles investigation of electronic and optical properties of H‐doped FeS ₂

Pan

2021

Int J Energy Res

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“…Cu2WSe4 have been synthesized by using hot-injection method according to reported literature [40,41]. Herein, stoichiometric amount of copper (II) chloride dihydrate (134.45 mg) and tungsten (IV) chloride (162.825 mg) were mixed with oleylamine (OLA) (12 mL) in a two-neck flask and evacuated at room temperature for 30 min under Ar flow.…”

Section: Synthesis Of Cu2wse4 Nanostructuresmentioning

confidence: 99%

“…Morphology and particle shape of Cu2WSe4 were investigated by TEM technique as shown in Figure 1bc. According to TEM images, Cu2WSe4 catalyst displayed square and rectangular sheet-like shapes with approximately 50 nm of edge sizes [41]. Selected area electron diffraction (SAED) pattern shows that Cu2WSe4 has a single crystalline and well crystallized [40,43].…”

Section: Characterization Of Cu2wse4mentioning

confidence: 99%

“…Moreover, the catalytic activity differences between Cu2WSe4 cand Cu2WS4 is able to related band gap and energy band levels of catalysts. Band gaps and energy band levels of Cu2WX4 catalysts were calculated by our previous published paper for the determination of differences photocatalytic activities for HER (Table 1) [41]. According to conduction band levels of Cu2WX4 catalyst, having close conduction band level, which is -0.16 V vs. NHE for Cu2WS4 to H + /H2 (0 V vs. NHE) is more apt to react.…”

Section: Catalytic Hydrogen Evolution At Liquid/liquid Interfacesmentioning

confidence: 99%

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Hydrogen evolution by ternary metal selenide at biomembrane-like soft interfaces

Aslan

2021

Cumhuriyet Science Journal

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Two phase reactions are the analogy of biomembranes, which are polarized by Galvani potential difference at interface between two immiscible electrolyte solutions. Energy conversion reactions such as oxygen reduction reaction or hydrogen evolution reaction have been great drawn attention at soft interfaces due to the similarity of natural biochemical reactions. In this study, copper-based ternary metal selenide (copper tungsten selenide, Cu2WSe4) was first reported in the literature for hydrogen evolution reaction catalysis at the water/1,2-dichloroethane interface. The synthesized Cu2WSe4 catalyst is characterized by morphological and structural techniques. Catalytic activity of Cu2WSe4 at liquid-liquid interfaces by lipophilic decamethylferrocene as the sacrificial electron donor agent. This catalytic activity was tracked by four-electrode voltammetry at the water/1,2-dichloroethane interface and biphasic reactions monitored by gas chromatography. The rates of the hydrogen evolution reaction catalyzed by the Cu2WSe4 were found to be approximately 160-fold than the rate for the reaction performed in the absence of a catalyst.

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“…However, TiO 2 has some drawbacks during the PEC process, such as limited absorbance for visible light, rapid recombination of carriers, low charge transfer efficiency and so on. [32][33][34][35] To solve this problem, several measures have been reported, such as dye sensitization, [21,36,37] coupling TiO 2 with other semiconductors, [38][39][40] elements doping [41,42] and noble metal deposition as co-catalysts. [43,44] Yan and his coworkers [45] reported a design idea and synthesis method of TiO 2 nanorods modified graphene (G-TNRs) catalyst for photocatalysis, the photocurrent density could reach 4.9 μA/cm 2 [a] S. Tao, F. Wang, J. Zhang, J. Shi, W. Guo represent divalent and trivalent metal ions, respectively; A nÀ represents the interlayer anion; x stands for the molar ratio of M 3 + /(M 2 + + M 3 + )].…”

Section: Introductionmentioning

confidence: 99%

Visible‐Light‐Responsive TiO₂/NiFe Mixed Metal Oxide‐Carbon Photocatalytic Fuel Cell with Synchronous Hydrogen Peroxide Production

et al. 2021

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The photocatalytic fuel cell (PFC) synergistically utilizes the photocatalytic oxidation of biomass and the electrochemical reaction of the fuel cell to selectively reduce oxygen to produce hydrogen peroxide (H 2 O 2 ) at room temperature. Herein, we report a PEC system that NiFe-layered double oxide (LDO)/TiO 2 as photoanode, carbon black as cathode for utilizing biomass and oxygen to simultaneously convert solar energy into electricity and produce hydrogen peroxide without applied electric bias. The photoanode catalyst was fabricated with TiO 2supported NiFe mixed metal oxides (MMO) which obtained by layered double hydroxides (LDHs) pyrolysis. The research results indicate that under solar irradiation, the photocurrent density and faraday efficiency have a significantly improved compared with pure NiO/TiO 2 . With methanol as the feeding fuel at the photoanode, the optimal device yields an excellent open circuit voltage (V oc ), short circuit current (J sc ) and a maximum power density (P max ) of 0.78 V, 1093 μA/cm 2 and 169 μW/cm 2 , respectively. This performance improvement is attributed to the Fe 3 + doped in NiFe-MMO and use TiO 2 as an electron transport layer. Simultaneously, the hydrogen peroxide concentration reached 0.443 mM after 180 min illumination at the cathode, the generation rate was optimized to 0.126 μmol/min/cm 2 at neutral aqueous solution. The PEC system exhibited an excellent higher rate of production for H 2 O 2 , and faraday efficiency (FE) reached 31.7 %. This PFC is a green technology for photocatalytically oxidize biomass at the photoanode and convert solar energy into electricity as well as supply it to the cathode to reduce O 2 to produce H 2 O 2 efficiently.

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Dye-sensitized photocatalytic hydrogen evolution by using copper-based ternary refractory metal chalcogenides

Cited by 18 publications

References 75 publications

First‐principles investigation of electronic and optical properties of H‐doped FeS ₂

First‐principles investigation of electronic and optical properties of H‐doped FeS ₂

Hydrogen evolution by ternary metal selenide at biomembrane-like soft interfaces

Visible‐Light‐Responsive TiO₂/NiFe Mixed Metal Oxide‐Carbon Photocatalytic Fuel Cell with Synchronous Hydrogen Peroxide Production

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Dye-sensitized photocatalytic hydrogen evolution by using copper-based ternary refractory metal chalcogenides

Cited by 18 publications

References 75 publications

First‐principles investigation of electronic and optical properties of H‐doped FeS 2

First‐principles investigation of electronic and optical properties of H‐doped FeS 2

Hydrogen evolution by ternary metal selenide at biomembrane-like soft interfaces

Visible‐Light‐Responsive TiO2/NiFe Mixed Metal Oxide‐Carbon Photocatalytic Fuel Cell with Synchronous Hydrogen Peroxide Production

Contact Info

Product

Resources

About

First‐principles investigation of electronic and optical properties of H‐doped FeS ₂

First‐principles investigation of electronic and optical properties of H‐doped FeS ₂

Visible‐Light‐Responsive TiO₂/NiFe Mixed Metal Oxide‐Carbon Photocatalytic Fuel Cell with Synchronous Hydrogen Peroxide Production