Toward enhancing the photoelectrochemical water splitting efficiency of organic acid doped polyaniline-WO3 photoanode by photo-assisted electrochemically reduced graphene oxide

Hosseini, Mir Ghasem; Sefidi, Pariya Yardani; Aydın, Zeynep; Kınayyiğit, Şölen

doi:10.1016/j.electacta.2019.135475

Cited by 37 publications

(8 citation statements)

References 52 publications

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“…0.08 % at 0.6 V. The dependencies of the evolved amounts on the applied voltages deviated from linear relationships in the high voltage range, wherefore the LTH values exhibited a downward dependence. Such voltage‐dependent water splitting reactions have been also described in the previous reports [3,4,6,20,34–36] . They occur because applying a high voltage to a reaction system cannot result in a linear increase in the amount of carriers available in a water splitting reaction.…”

Section: Resultsmentioning

confidence: 55%

“…Water photolysis is known to be the most optimal procedure for acquiring solar hydrogen. Since the discovery of the water splitting system comprising a titanium(IV) dioxide (TiO 2 ) photoanode by Honda and Fujishima, [1] numerous studies on water splitting by both photoelectrochemical and photocatalytic methods have been conducted [2–12] . As a long‐standing issue, the development of active photocatalyst materials, which are able to efficiently utilize the solar spectrum for high output of molecular hydrogen, is required.…”

Section: Introductionmentioning

confidence: 99%

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A Water‐Splitting System with a Cobalt (II,III) Oxide Co‐Catalyst‐Loaded Bismuth Vanadate Photoanode Along with an Organo‐Photocathode

et al. 2020

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In the water‐splitting reaction, the oxidation of water to O2 is considered to be a kinetically demanding process, so that a co‐catalyst has been usually applied to promote water oxidation. This work demonstrates that, when loading mixed‐valence cobalt (II,III) oxide (Co3O4) dispersed in a Nafion membrane (Nf) on a nanoporous bismuth vanadate (BiVO4) photoanode (i. e., BiVO4/Nf[Co3O4]), stable and efficient water oxidation occurred. In particular, it is noteworthy that the BiVO4/Nf[Co3O4] photoanode exhibited stable performance even in an acidic medium (pH=2). In the present system consisting of a BiVO4/Nf[Co3O4] photoanode along with an organo‐photocathode, the stoichiometric formation of O2 and H2 successfully occurred by applying just 0.1 V between the photoelectrodes (cf. maximum efficiency, ca. 0.2 %), which was superior to the prototype comprising BiVO4 and Pt counter electrode. The Co3O4 loading can effectively suppress the collapse of the nanostructured BiVO4 upon photocorrosion, resulting in the stable and kinetically efficient consumption of holes in BiVO4.

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Section: Resultsmentioning

confidence: 55%

Section: Introductionmentioning

confidence: 99%

A Water‐Splitting System with a Cobalt (II,III) Oxide Co‐Catalyst‐Loaded Bismuth Vanadate Photoanode Along with an Organo‐Photocathode

et al. 2020

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“…Figure 7a shows the Nyquist plots (imaginary vs. real impedance) of W 18 O 49 films deposited at different sputtering deposition times and annealing at 500 • C. All the experiments and measurements were carried out under illumination. One time constant circuit was used as equivalent circuit, in which, solution resistance (R s ) is connected in series with a sub-circuit formed of a capacitor connected in parallel with charge transfer resistance (R ct ) [38]. It can be seen that the arc radiuses of the W 18 O 49 films deposited for 20 min (R ct = 135 Ω) and 10 min (R ct = 172 Ω) were enormously short compared with 1 min (R ct = 760 KΩ) and 5 min (165 KΩ) W 18 O 49 films, suggesting significantly faster charge transfer kinetics in the first mentioned W 18 O 49 films [39].…”

Section: Resultsmentioning

confidence: 99%

Nanostructured Magnéli-Phase W18O49 Thin Films for Photoelectrochemical Water Splitting

et al. 2020

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Converting water into hydrogen through the photo-electrochemical (PEC) process is one of the most exciting approaches in this field, and there is a quest to design or search for new electro-photo-catalytic materials. In this work, simple steps for fabrication and transformation of metallic tungsten thin film into the photo-active Magnéli-phase (W18O49) of tungsten oxide thin film is demonstrated. The post-annealing temperature has a significant impact on the phase evolution of tungsten film into W18O49. The film thickness of W18O49 is controlled by controlling the sputtering time (or deposition time) of W film. The PEC performance of the as-prepared electrodes is evaluated by monitoring the water oxidation reaction under visible radiation. The PEC findings reveal a correlation between PEC performance and phase, morphology, and thickness of the film. The as-derived W18O49 can efficiently catalyze the water oxidation reaction at neutral solution pH, generating 0.6 and 1.4 mA cm−1 photo-current at 0.6 and 0.8 V vs. Saturated calomel electrode (SCE), respectively, in addition to excellent stability. The electrical conductivity and the charge transfer kinetics are investigated employing the electrochemical impedance spectroscopic (EIS) technique.

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“…[ 19 ] Furthermore, PANI acts as a hole transfer material that rapidly transfer holes of MoS 2 or WO 3 leading to the enhancement in photocatalytic performance and its stability. It has been reported that PANI is widely used in combination with a nanocomposite of MoS 2 [ 20 ] and WO 3 [ 21 ] for improving its catalytic efficiency.…”

Section: Introductionmentioning

confidence: 99%

Silver nanoparticles decorated a hybrid of PANI/MoS₂ and PANI/WO₃ as potential catalysts for direct photoelectrochemical oxidation of glucose

Thu,

Van Tuan,

Ngan

et al. 2022

Vietnam Journal of Chemistry

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This paper presents an effective electrodeposition method for generating hybrid material based on polyaniline (PANI), n‐type semiconductor (MoS2/WO3), and silver nanoparticle (AgNPs) which can trigger direct oxidation glucose in solution without an enzyme catalyst. To do so, the working electrode surface is firstly electrochemically modified by the PANI layers decorated with MoS2 and/or WO3, then electrodeposition of AgNPs on the as‐prepared electrode is carried out subsequently. The addition of WO3 and/or MoS2 and AgNPs to PANI matrix improves interfacial charge transfer efficiency. Especially, under light irradiation, the synergistic effect of n‐type semiconductor and AgNPs into the PANI matrix prompted its higher electrocatalytic activity which is exploited for direct oxidation of glucose in solution without the presence of any enzyme. This strategical approach reveals a promising manner for generating non‐enzymatic glucose electrochemical sensors upon laser excitation.

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Toward enhancing the photoelectrochemical water splitting efficiency of organic acid doped polyaniline-WO3 photoanode by photo-assisted electrochemically reduced graphene oxide

Cited by 37 publications

References 52 publications

A Water‐Splitting System with a Cobalt (II,III) Oxide Co‐Catalyst‐Loaded Bismuth Vanadate Photoanode Along with an Organo‐Photocathode

A Water‐Splitting System with a Cobalt (II,III) Oxide Co‐Catalyst‐Loaded Bismuth Vanadate Photoanode Along with an Organo‐Photocathode

Nanostructured Magnéli-Phase W18O49 Thin Films for Photoelectrochemical Water Splitting

Silver nanoparticles decorated a hybrid of PANI/MoS₂ and PANI/WO₃ as potential catalysts for direct photoelectrochemical oxidation of glucose

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Toward enhancing the photoelectrochemical water splitting efficiency of organic acid doped polyaniline-WO3 photoanode by photo-assisted electrochemically reduced graphene oxide

Cited by 37 publications

References 52 publications

A Water‐Splitting System with a Cobalt (II,III) Oxide Co‐Catalyst‐Loaded Bismuth Vanadate Photoanode Along with an Organo‐Photocathode

A Water‐Splitting System with a Cobalt (II,III) Oxide Co‐Catalyst‐Loaded Bismuth Vanadate Photoanode Along with an Organo‐Photocathode

Nanostructured Magnéli-Phase W18O49 Thin Films for Photoelectrochemical Water Splitting

Silver nanoparticles decorated a hybrid of PANI/MoS2 and PANI/WO3 as potential catalysts for direct photoelectrochemical oxidation of glucose

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Product

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Silver nanoparticles decorated a hybrid of PANI/MoS₂ and PANI/WO₃ as potential catalysts for direct photoelectrochemical oxidation of glucose