Alternative route to bypass the bottle-neck of water oxidation: Two-electron oxidation of water catalyzed by earth-abundant metalloporphyrins

Kuttassery, Fazalurahman; Mathew, Siby; Remello, Sebastian Nybin; Thomas, Arun; Sano, Keito; Ohsaki, Yutaka; Nabetani, Yu; Tachibana, Hiroshi; Inoue, Haruo

doi:10.1016/j.ccr.2018.08.027

Cited by 43 publications

(30 citation statements)

References 53 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Besides the photoelectrochemical oxidation of ascorbate presented in the previous paragraphs and used as a performance indicator of the electrodes, an emerging approach involves the application of photoanodes for the oxidation of organic compounds aimed at obtaining valuable chemicals [60][61][62][63][64].…”

Section: Perspectives: Photoelectrochemical Oxidation Of Benzyl Alcoholmentioning

confidence: 99%

Artificial photosynthesis: photoanodes based on polyquinoid dyes onto mesoporous tin oxide surface

Volpato

Colusso

Paoloni

et al. 2021

Photochem Photobiol Sci

View full text Add to dashboard Cite

Dye-sensitized photoelectrochemical cells represent an appealing solution for artificial photosynthesis, aimed at the conversion of solar light into fuels or commodity chemicals. Extensive efforts have been directed towards the development of photoelectrodes combining semiconductor materials and organic dyes; the use of molecular components allows to tune the absorption and redox properties of the material. Recently, we have reported the use of a class of pentacyclic quinoid organic dyes (KuQuinone) chemisorbed onto semiconducting tin oxide as photoanodes for water oxidation. In this work, we investigate the effect of the SnO2 semiconductor thickness and morphology and of the dye-anchoring group on the photoelectrochemical performance of the electrodes. The optimized materials are mesoporous SnO2 layers with 2.5 μm film thickness combined with a KuQuinone dye with a 3-carboxylpropyl-anchoring chain: these electrodes achieve light-harvesting efficiency of 93% at the maximum absorption wavelength of 533 nm, and photocurrent density J up to 350 μA/cm2 in the photoelectrochemical oxidation of ascorbate, although with a limited incident photon-to-current efficiency of 0.075%. Calculations based on the density functional theory (DFT) support the role of the reduced species of the KuQuinone dye via a proton-coupled electron transfer as the competent species involved in the electron transfer to the tin oxide semiconductor. Finally, a preliminary investigation of the photoelectrodes towards benzyl alcohol oxidation is presented, achieving photocurrent density up to 90 μA/cm2 in acetonitrile in the presence of N-hydroxysuccinimide and pyridine as redox mediator and base, respectively. These results support the possibility of using molecular-based materials in synthetic photoelectrochemistry. Graphic abstract

show abstract

Section: Perspectives: Photoelectrochemical Oxidation Of Benzyl Alcoholmentioning

confidence: 99%

Artificial photosynthesis: photoanodes based on polyquinoid dyes onto mesoporous tin oxide surface

Volpato

Colusso

Paoloni

et al. 2021

Photochem Photobiol Sci

View full text Add to dashboard Cite

show abstract

“…35,36 In designing a renewable energy system, however, an involvement of the high temperature processes should be minimized as little as possible from the viewpoint of the renewable energy factor (REF) that is defined as REF = Energy output/Energy input >1. 11 The numerator (Energy output: a function of energy resources such as sun light radiation and energy conversion efficiency of the device) tends to attract dominant attention, whereas the denominator (Energy input: a function of energy for constructing and operating the device) should be simultaneously considered as one of the key factors. The high-temperature process inevitably diminishes the REF value.…”

Section: Resultsmentioning

confidence: 99%

Optically Transparent Colloidal Dispersion of Titania Nanoparticles Storable for Longer than One Year Prepared by Sol/Gel Progressive Hydrolysis/Condensation

Sano

Kuttassery

Shimada

et al. 2020

ACS Appl. Mater. Interfaces

Self Cite

View full text Add to dashboard Cite

The molecular catalyst sensitized system (MCSS), where an excited molecular catalyst adsorbed on a semiconductor such as TiO 2 injects electrons to the conduction band of the semiconductor leading to hydrogen evolution/ CO 2 reduction coupled with an oxidation of water on the molecular catalyst, has been one of the most probable candidates in the approach to artificial photosynthesis. For a full utilization of visible light, however, a serious light scattering of the aqueous suspension of TiO 2 in the visible region, which is generally experienced, should be avoided. Here, we report a preparation of optically transparent colloidal dispersion of TiO 2 by the sol/gel reaction of TiCl 4 through progressive hydrolysis/condensation under the basic condition without any calcination processes. The TiO 2 nanoparticles (TiO 2 (NPs)) obtained were characterized as an amorphous particle (∼10−15 nm) having a microcrystal domain of anatase within several nm by XRD, Raman spectroscopies, XRF, XAFS, TG/DTA, and HRTEM, respectively. The energy-resolved distribution of carrier electron traps in TiO 2 (NPs) as a fingerprint of TiO 2 was characterized through reversed double-beam photo-acoustic spectroscopy to have a close similarity to that of TiO 2 (ST-01) as well as the observation of carrier traps by transient absorption spectroscopy. Though the powder TiO 2 (NP) itself was not dispersed well in aqueous solution, the wet TiO 2 (NPs) as prepared before being dried up provided a completely transparent aqueous dispersion under the acidic condition (1 M HCl). Addition of methanol enabled the colloidal dispersion (TiO 2 (NPs, MeOH/H 2 O, 0.1 M HCl)) to keep the optical transparency for longer than 1 year (550 days), which is the first example of TiO 2 dispersion storable for such a long period. TiO 2 (NPs, MeOH/H 2 O) exhibited a moderate photocatalytic reactivity of H 2 evolution with a quantum yield of ∼2.6% upon 365 nm light irradiation. An optically transparent thin film of TiO 2 (NPs, MeOH/H 2 O) was also successfully prepared on a glass plate to exhibit an enhanced hydrophilicity upon UV light irradiation.

show abstract

“…In the production of an industrial H 2 /H 2 O 2 PEC system, it is very important that the energy required to build the plant does not exceed the chemical energy harvested. In literature, this concept is referred to as the renewable energy factor (REF), 68,69 or the energy return on energy invested (EROEI). 70,71 The EROEI can be calculated using the following formula:…”

Section: àmentioning

confidence: 99%

Industrial feasibility of anodic hydrogen peroxide production through photoelectrochemical water splitting: a techno-economic analysis

Wenderich

Kwak

Grimm

et al. 2020

Sustainable Energy Fuels

View full text Add to dashboard Cite

show abstract

Alternative route to bypass the bottle-neck of water oxidation: Two-electron oxidation of water catalyzed by earth-abundant metalloporphyrins

Cited by 43 publications

References 53 publications

Artificial photosynthesis: photoanodes based on polyquinoid dyes onto mesoporous tin oxide surface

Artificial photosynthesis: photoanodes based on polyquinoid dyes onto mesoporous tin oxide surface

Optically Transparent Colloidal Dispersion of Titania Nanoparticles Storable for Longer than One Year Prepared by Sol/Gel Progressive Hydrolysis/Condensation

Industrial feasibility of anodic hydrogen peroxide production through photoelectrochemical water splitting: a techno-economic analysis

Contact Info

Product

Resources

About