Development of separate-type Pt-free photofuel cells based on visible-light responsive TiO2 photoanode

Iyatani, Kazushi; Horiuchi, Yu; Moriyasu, Madoka; Fukumoto, Shohei; Cho, So-Hye; Takeuchi, Masato; Matsuoka, Makoto; Anpo, Masakazu

doi:10.1039/c2jm32064a

Cited by 19 publications

(9 citation statements)

References 32 publications

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“…Similarly, the peak output power density increases from 0.092 mW/cm 2 for the bare InGaN layer over 0.11 mW/cm 2 for the 0.5 ML InN/InGaN layer to a maximum of 0.22 mW/cm 2 for the 1.5 ML InN/InGaN QDs and then strongly decreases to 0.078 mW/cm 2 for the 3 ML InN/InGaN QDs. The maximum output power density for the 1.5 ML InN/InGaN QD photoanode is very competitive for an abiotic, one-compartment glucose PFC operating under mild conditions and medium glucose concentrations and with a noble metal-free photoanode, see refs ( 11 )– 17 and the tables in ref ( 1 ). In the dark, the current densities and output power densities are very small, at least 3 orders of magnitude smaller than those under illumination.…”

Section: Resultsmentioning

confidence: 99%

“…Among abiotic biofuel cells, photofuel cells (PFCs) are an advanced development in the FC technology which potentially provide high photocurrent and output power due to the input of light at the semiconductor photoelectrodes. − Here, we introduce an InN/InGaN quantum dot (QD) photoanode for realizing an abiotic, one-compartment PFC with a Pt cathode and glucose as a biofuel. The PFC operates under physiological, mild conditions with suitable photocurrent and output power for medium to low glucose concentrations.…”

Section: Introductionmentioning

confidence: 99%

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InN/InGaN Quantum Dot Abiotic One-Compartment Glucose Photofuel Cell: Power Supply and Sensing

et al. 2021

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InN/InGaN quantum dots (QDs) are introduced as an efficient photoanode for a novel abiotic one-compartment photofuel cell (PFC) with a Pt cathode and glucose as a biofuel. Due to the high catalytic activity and selectivity of the InN/InGaN QDs toward oxidation reactions, the PFC operates without a membrane under physiologically mild conditions at medium to low glucose concentrations with a noble-metal-free photoanode. A relatively high short-circuit photocurrent density of 0.56 mA/cm 2 and a peak output power density of 0.22 mW/cm 2 are achieved under 1 sun illumination for a 0.1 M glucose concentration with optimized InN/InGaN QDs of the right size. The super-linear dependence of the short-circuit photocurrent density and the output power density as a function of the logarithmic glucose concentration makes the PFC well suited for sensing, covering the 4–6 mM range of glucose concentration in blood under normal conditions with good selectivity. No degradation of the PFC operation over time is observed.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

InN/InGaN Quantum Dot Abiotic One-Compartment Glucose Photofuel Cell: Power Supply and Sensing

et al. 2021

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“…The polarization curves show a distinct lack of activation polarization found in conventional fuel cells and appear to be dominated by concentration polarization. This is a common phenomenon in photocatalytic electrochemical cells is likely due to the excitation of charge carriers in photocatalystic materials . Because current is induced through the anode material as opposed to the external circuit, it is possible that activation polarization is intrinsically overcome by the photogeneration of charge carriers in a catalyst with a sufficiently large redox potential.…”

Section: Resultsmentioning

confidence: 99%

Advanced Biowaste‐Based Flexible Photocatalytic Fuel Cell as a Green Wearable Power Generator

Lui

Jiang

Lenos

et al. 2016

Adv Materials Technologies

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This study designs a wearable power generator from a flexible, photocatalytic fuel cell (fPFC) using various biowaste sources (lactic acid, ethanol, methanol, urea, glycerol, and glucose) as fuel. The fPFC uses light irradiation and the decomposition of biowaste to generate electrical power under both flat and bending (r = 3 cm) conditions. When employed as a sweat band, the fPFC generates a maximum power 4.0 mW cm−2 g−1 from human sweat. The wearable fPFC is able to overcome many of the disadvantages of wearable microbial and enzymatic cells while providing comparable if not superior power density.

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“…As a new type of PEC cells, photofuel cells (PFCs) using TiO 2 ‐based photoanodes have attracted much attention due to the availability of biomass derivatives as the fuel, but the operation emits CO 2 . Recently, one‐compartment H 2 O 2 ‐PFC using mp‐TiO 2 as the photoanode has been developed .…”

Section: Figurementioning

confidence: 99%

Ultrathin Silicon Oxide Film‐Induced Enhancement of Charge Separation and Transport of Nanostructured Titanium(IV) Oxide Photoelectrode

2019

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The development of nanostructured semiconductor electrodes represented by a mesoporous TiO2 nanocrystalline (mp‐TiO2) film is currently bringing great progresses in photoelectrochemical (PEC) devices for solar‐to‐electricity and solar‐to‐chemical conversion. Two serious losses can occur in PEC devices: 1) recombination between the conduction band (CB) electrons and valence band (VB) holes in the bulk and at the surface and 2) back reaction or electron trapping by oxidant in the electrolyte solution during transport to the electron‐collecting electrode. Thus, the major challenge in common with the nanostructured semiconductor photoanodes is to achieve efficient charge separation and electron transport. In this study, an ultrathin SiOx layer was formed on both the external and the internal surface of mp‐TiO2 using an original chemisorption‐calcination technique employing 1,3,5,7‐tetramethyltetrasiloxane as a starting material. The SiOx surface modification of the mp‐TiO2 photoanode drastically prolongs the mean lifetime of CB‐electrons in TiO2 because of enhanced charge separation and electron transport by the negative charge applied in aqueous electrolyte solution. We have demonstrated that the performance of a one‐compartment H2O2‐photofuel cell using mp‐TiO2 as the photoanode is greatly boosted by the surface modification with the SiOx layer. We anticipate that this methodology is widely applicable to nanostructured metal oxide semiconductor electrodes, contributing to the improvement in the performance of PEC devices.

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Development of separate-type Pt-free photofuel cells based on visible-light responsive TiO2 photoanode

Cited by 19 publications

References 32 publications

InN/InGaN Quantum Dot Abiotic One-Compartment Glucose Photofuel Cell: Power Supply and Sensing

InN/InGaN Quantum Dot Abiotic One-Compartment Glucose Photofuel Cell: Power Supply and Sensing

Advanced Biowaste‐Based Flexible Photocatalytic Fuel Cell as a Green Wearable Power Generator

Ultrathin Silicon Oxide Film‐Induced Enhancement of Charge Separation and Transport of Nanostructured Titanium(IV) Oxide Photoelectrode

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