Solar hydrogen production by tandem cell system composed of metal oxide semiconductor film photoelectrode and dye-sensitized solar cell

Arakawa, Hironori; Shiraishi, Chikara; Tatemoto, M.; Kishida, Hiroshi; Usui, D.; Suma, A.; Takamisawa, A.; Yamaguchi, Takeshi

doi:10.1117/12.773366

Cited by 17 publications

(8 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The photoanode/DSSC combination was first suggested by Augustynski and Graẗzel 104 with WO 3 as the photoanode suggesting that device would be capable of 4.5% η STH based on the plateau photocurrent (J pl ) of WO 3 . 105 In practice, tandem devices with WO 3 have been constructed by Park and Bard 106 and Arakawa et al 107 giving η STH 's up to 2.8% at AM 1.5G (100 mW cm −2 ) using Pt as the cathode. However, similar to the a-Si based devices, two DSSCs connected in series to the photoanode were necessary to afford overall water splitting.…”

Section: Photoanode/photovoltaic Tandem Cellsmentioning

confidence: 99%

Photoelectrochemical Tandem Cells for Solar Water Splitting

2013

View full text Add to dashboard Cite

In order to be economically competitive with simple “brute force” (i.e., PV + electrolyzer) strategies or the production of promising solar fuels, like H2, from fossil fuels, a practical photoelectrochemical device must optimize cost, longevity, and performance. A promising approach that meets these requirements is the combination of stable and inexpensive oxide semiconductor electrodes in a tandem photoelectrochemical device. In this article, we give an overview of the field including an examination of the potential solar-to-fuel conversion efficiency expected in a device with realistic losses. We next discuss recent advances with increasing the performance of promising semiconductor electrode materials and highlight how these advances have led to state-of-the-art solar-to-chemical efficiencies in the 2–3% range in real devices. Challenges for further optimization are further outlined.

show abstract

Section: Photoanode/photovoltaic Tandem Cellsmentioning

confidence: 99%

Photoelectrochemical Tandem Cells for Solar Water Splitting

2013

View full text Add to dashboard Cite

show abstract

“…The products of these oxidations are either CO 3 •– or C 2 O 6 2– . Indeed, several studies have pointed out that the presence of HCO 3 – /CO 3 2– in the system catalyzes photochemical water oxidation. ,, Furthermore, it has been shown that photochemical oxidation of SO 2 in aqueous media is enhanced by the presence of carbonate . It was proposed that the formation of CO 3 •– is involved.…”

Section: Photocatalysismentioning

confidence: 99%

The Role of Carbonate in Catalytic Oxidations

Mizrahi²,

2020

View full text Add to dashboard Cite

Conspectus CO 2 , HCO 3 – , and CO 3 2– are present in all aqueous media at pH > 4 if no major effort is made to remove them. Usually the presence of CO 2 /HCO 3 – /CO 3 2– is either forgotten or considered only as a buffer or proton transfer catalyst. Results obtained in the last decades point out that carbonates are key participants in a variety of oxidation processes. This was first attributed to the formation of carbonate anion radicals via the reaction OH • + CO 3 2– → CO 3 •– + OH – . However, recent studies point out that the involvement of carbonates in oxidation processes is more fundamental. Thus, the presence of HCO 3 – /CO 3 2– changes the mechanisms of Fenton and Fenton-like reactions to yield CO 3 •– directly even at very low HCO 3 – /CO 3 2– concentrations. CO 3 •– is a considerably weaker oxidizing agent than the hydroxyl radical and therefore a considerably more selective oxidizing agent. This requires reconsideration of the sources of oxidative stress in biological systems and might explain the selective damage induced during oxidative stress. The lower oxidation potential of CO 3 •– probably also explains why not all pollutants are eliminated in many advanced oxidation technologies and requires rethinking of the optimal choice of the technologies applied. The role of percarbonate in Fenton-like processes and in advanced oxidation processes is discussed and has to be re-evaluated. Carbonate as a ligand stabilizes transition metal complexes in uncommon high oxidation states. These high-valent complexes are intermediates in electrochemical water oxidation processes that are of importance in the development of new water splitting technologies. HCO 3 – and CO 3 2– are also very good hole scavengers in photochemical processes of semiconductors and may thus become key participants in the development of new processes for solar energy conversion. In this Account, an attempt to correlate these observations with the properties of carbonates is made. Clearly, further studies are essential to fully uncover the potential of HCO 3 – /CO 3 2– in desired oxidation processes.

show abstract

“…In practice, tandem devices with WO 3 have been constructed by Park and Bard 126 and Arakawa et al 127 However, similar to the a-Si-based devices, two DSSCs connected in series to the photoanode were necessary to afford overall water splitting. This was accomplished by positioning these two DSSCs side by side behind the WO 3 photoanode.…”

Section: Pec/dssc Tandem Cellsmentioning

confidence: 99%

Towards highly efficient photoanodes: boosting sunlight-driven semiconductor nanomaterials for water oxidation

Gan¹,

Lu²,

Tong³

2014

Nanoscale

182

127

View full text Add to dashboard Cite

Harvesting energy directly from sunlight is a very attractive and desirable way to solve the rising energy demand. In the past few decades, considerable efforts have been focused on identifying appropriate materials and devices that can utilize solar energy to produce chemical fuels. Among these, one of the most promising options is the construction of a photoelectrochemical (PEC) cell that can produce hydrogen fuel or oxygen from water. Significant advancement in the understanding and construction of efficient photoanodes to improve performance has been accomplished within a short period of time owing to various newly developed ideas and approaches, including facilitating charge transportation in narrow band gap semiconductors or doping in wide band gap semiconductors for enhancing visible-light absorption; electrocatalysts for decreasing overpotentials; controlling the morphology of the materials for enhancing light absorption and shortening the transfer distance of minority carriers; and other methods such as using heterojunction structures for band-structure engineering, sensitization, and passivating layers. In this review, we focus on the recent developments of some promising visible-light active photoanode materials with high PEC performance, such as BiVO4, α-Fe2O3, WO3, TaON, and Ta3N5.

show abstract

Solar hydrogen production by tandem cell system composed of metal oxide semiconductor film photoelectrode and dye-sensitized solar cell

Cited by 17 publications

References 17 publications

Photoelectrochemical Tandem Cells for Solar Water Splitting

Photoelectrochemical Tandem Cells for Solar Water Splitting

The Role of Carbonate in Catalytic Oxidations

Towards highly efficient photoanodes: boosting sunlight-driven semiconductor nanomaterials for water oxidation

Contact Info

Product

Resources

About