A photofuel cell comprising titanium oxide and silver(<scp>i</scp>/0) photocatalysts for use of acidic water as a fuel

Ogura, Yasunobu; Okamoto, Seiji; Itoi, Takaomi; Fujishima, Yukiko; Yoshida, Yusuke; Izumi, Yasuo

doi:10.1039/c4cc00194j

Cited by 26 publications

(59 citation statements)

References 25 publications

(28 reference statements)

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“…At pH 4.0, a PFC current of 3 lA was obtained (not shown) for 2.5 h irradiated by UV-visible light (0.28 lmol-e À generated in total) [11]. The pH values starting from 4.0 for the HCl solution (40 mL, 4.0 lmol-H + ) remained constant after the PFC test at both the anode and cathode.…”

Section: Photocurrent Testsmentioning

confidence: 84%

“…For Test 1, in response to the UV-visible irradiation, photocurrents gradually increased from 43.7 to 60.5 lA in five cycles at pH 2.0. In contrast, the photocurrents increased and converged to a constant value (26.7 lA) in the test at pH 3.0 (not shown) [11]. Thus, the active metallic Ag 0 species for photoreduction of O 2 at the cathode should gradually increase, transformed from Ag 2 O by the reaction with protons, in the five cycles at pH 2.0.…”

Section: Photocurrent Testsmentioning

confidence: 94%

“…Thus, the active metallic Ag 0 species for photoreduction of O 2 at the cathode should gradually increase, transformed from Ag 2 O by the reaction with protons, in the five cycles at pH 2.0. The transformation of the active Ag species (Ag 0 , Ag 2 O and AgCl) was reported based on an extended X-ray absorption fine-structure study [11].…”

Section: Photocurrent Testsmentioning

confidence: 99%

“…Recently, a new device was demonstrated: a PFC utilizing two photocatalysts of TiO 2 and silver(0/I)-doped TiO 2 [10] on an electrode film, both immersed in acidic solutions separated by a PCP film [11]. Platinum is not used [5][6][7][8][12][13][14][15][16], and only inexpensive materials were used in the PFC for sustainability.…”

Section: Introductionmentioning

confidence: 99%

“…Although PFC enable higher electromotive force (1.8 V) [11,21] and use only acidic water as a medium and inexpensive catalysts, PFC need a gas supply to promote surface reactions at both the anode and cathode. At the anode, O 2 gas needs to be evacuated by N 2 flow to prevent a reverse surface reaction:…”

Section: Introductionmentioning

confidence: 99%

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Recyclable PhotoFuel Cell for Use of Acidic Water as a Medium

Ogura

Yoshiba

Izumi

2015

Oil Gas Sci. Technol. – Rev. IFP Energies nouvelles

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-We reported a new PhotoFuel Cell (PFC) comprising two photocatalysts for use of acidic water as a recyclable medium. Nitrogen and oxygen flow was required in the photoanode and photocathode, respectively. In this study, we developed a gas-circulating PFC that needs no gas supply from outside. In the gas-circulating PFC, the reverse reaction of water oxidation at the anode was prevented by the gas flow of photogenerated O 2 from the anode to the cathode inside the PFC. The gas-circulating PFC accommodated an organic solvent layer over the aqueous electrolyte for the anode, and also a vent hole in the upper part of the Proton-Conducting Polymer (PCP) film. O 2 transferred from the anode electrolyte to the organic solvent due to the solubility difference between the HCl solution and organic solvent. O 2 transfer from the gas phase in the anode to that in the cathode was achieved by the vent hole in the PCP film due to the pressure difference due to the progress of the reaction. By the addition of a hexane layer to the anode of the PFC, it was demonstrated to achieve a photocurrent value of 69.7 lA per 1.3 cm 2 of photocatalysts. However, in the stability tests for more than 7 h, the small amount of remaining O 2 in the electrolyte (2.85 lmol L À1 ) exhibited serious effects on the PFC performance. The I SC , V OC and P Max values of the gas-circulating PFC were 29.2 lA, 1.18 V and 6.10 lW, that were 40%, 74% and 44%, respectively, of those for a N 2 and O 2 flow-type PFC. Apparently, photocurrents were dramatically suppressed by the reverse reaction at the photoanode in the extended tests for the gas-circulating PFC.

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Section: Photocurrent Testsmentioning

confidence: 84%

Section: Photocurrent Testsmentioning

confidence: 94%

Section: Photocurrent Testsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Recyclable PhotoFuel Cell for Use of Acidic Water as a Medium

Ogura

Yoshiba

Izumi

2015

Oil Gas Sci. Technol. – Rev. IFP Energies nouvelles

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A Fusion of Biomimetic Fuel and Solar Cells Based on Hydrogenase, Photosystem II, and Cytochrome c Oxidase

et al. 2017

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Design and Fabrication of a Dual‐Photoelectrode Fuel Cell towards Cost‐Effective Electricity Production from Biomass

et al. 2016

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A photo fuel cell (PFC) offers an attractive way to simultaneously convert solar and biomass energy into electricity. Photocatalytic biomass oxidation on a semiconductor photoanode combined with dark electrochemical reduction of oxygen molecules on a metal cathode (usually Pt) in separated compartments is the common configuration for a PFC. Herein, we report a membrane-free PFC based on a dual electrode, including a W-doped BiVO photoanode and polyterthiophene photocathode for solar-stimulated biomass-to-electricity conversion. Air- and water-soluble biomass derivatives can be directly used as reagents. The optimal device yields an open-circuit voltage (V ) of 0.62 V, a short-circuit current density (J ) of 775 μA cm , and a maximum power density (P ) of 82 μW cm with glucose as the feedstock under tandem illumination, which outperforms dual-photoelectrode PFCs previously reported. Neither costly separating membranes nor Pt-based catalysts are required in the proposed PFC architecture. Our work may inspire rational device designs for cost-effective electricity generation from renewable resources.

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A photofuel cell comprising titanium oxide and silver(i/0) photocatalysts for use of acidic water as a fuel

Cited by 26 publications

References 25 publications

Recyclable PhotoFuel Cell for Use of Acidic Water as a Medium

Recyclable PhotoFuel Cell for Use of Acidic Water as a Medium

A Fusion of Biomimetic Fuel and Solar Cells Based on Hydrogenase, Photosystem II, and Cytochrome c Oxidase

Design and Fabrication of a Dual‐Photoelectrode Fuel Cell towards Cost‐Effective Electricity Production from Biomass

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