Hydrogen Production from Photoelectrochemical Water Splitting

Dias, Paula; Mendes, Adélio

doi:10.1007/978-1-4939-7789-5_957

Cited by 13 publications

(16 citation statements)

References 177 publications

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“…In an acidic electrolyte cell, the photogenerated electron and hole undergo the two half reactions of PEC water splitting on the cathode and anode, respectively, which are expressed by following the two equations 18

4 {normalH}^{+} + 4 {normale}^{‐} \to 2 {normalH}_{2} {normalE}^{\circ} ({normalH}^{+} / {normalH}_{2}) = 0.00 V_{NHE}

2 {normalH}_{2} O + 4 {normalh}^{+} \to 4 {normalH}^{+} + O_{2} {normalE}^{\circ} ({normalH}_{2} O / {normalO}_{2}) = ‐ 1.229 V_{NHE}

…”

Section: Pec Water Splitting and Si‐based Pecmentioning

confidence: 99%

“…$2-$4 per kg, the commercial application of PEC water splitting will become possible. 17,18 A typical PEC water splitting cell consists of lightharvesting semiconductor photoelectrodes and an electrolyte solution. Between them, semiconductor photoelectrodes are the crucial components.…”

Section: Introductionmentioning

confidence: 99%

“…When the energy conversion efficiency of solar to hydrogen (STH) reaches 10%, and hydrogen production cost reduces to ca. $2–$4 per kg, the commercial application of PEC water splitting will become possible 17,18 …”

Section: Introductionmentioning

confidence: 99%

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Strategies for improving photoelectrochemical water splitting performance of Si‐based electrodes

Cheng

Zhang

Chen

et al. 2022

Energy Science & Engineering

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Si, as a narrow bandgap semiconductor with a broadband absorption for sunlight, is considered to be a very competitive photoelectrode material for solar-driven photoelectrochemical (PEC) water splitting. However, there are major barriers in construction of efficient and stable Si-based PEC cell, including low photovoltage, sluggish reaction kinetics, and poor stability in electrolytes. This review focuses on the strategies to solve these issues and summarizes recent progress. The working principles of PEC water splitting are first introduced. Then the strategies for improving Si-based photoelectrode performances are discussed, including (1) the regulation of Si surface morphology for enhancing light harvesting, (2) band structure engineering strategies to reduce recombination of photogenerated carriers, and (3) modification of protection layers for long stability and loading cocatalysts on Si-based photoelectrodes for accelerating water splitting. Lastly, we have presented some issues of Si-based photoelectrode materials, which should be addressed in future research.

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4 {normalH}^{+} + 4 {normale}^{‐} \to 2 {normalH}_{2} {normalE}^{\circ} ({normalH}^{+} / {normalH}_{2}) = 0.00 V_{NHE}

2 {normalH}_{2} O + 4 {normalh}^{+} \to 4 {normalH}^{+} + O_{2} {normalE}^{\circ} ({normalH}_{2} O / {normalO}_{2}) = ‐ 1.229 V_{NHE}

…”

Section: Pec Water Splitting and Si‐based Pecmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Strategies for improving photoelectrochemical water splitting performance of Si‐based electrodes

Cheng

Zhang

Chen

et al. 2022

Energy Science & Engineering

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“…Since the pioneering work of Fujishima and Honda in 1972, 11 the identification of a single semiconductor material that can both develop sufficient photovoltage for overall water splitting (1.5 -1.8 V) and harvest a significant fraction of the solar spectrum remains challenging. 16,17 Hematite (α-Fe 2 O 3 ) emerged as one of the most promising photoanodes due to its abundance, stability and suitable bandgap energy. 18 In spite of significant advancements in this field, [19][20][21] hematite photoanodes have yet to reach their full theoretical capabilities, and research is still needed to improve their performance and achieve higher photocurrents at lower potentials.…”

Section: Introductionmentioning

confidence: 99%

Decoupled Photoelectrochemical Water Splitting System for Centralized Hydrogen Production

Landman

Halabi

Dias

et al. 2020

Joule

Self Cite

113

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Photoelectrochemical (PEC) water splitting offers an elegant approach for solar energy conversion into hydrogen fuel. Large-scale hydrogen production requires stable and efficient photoelectrodes and scalable PEC cells that are fitted for safe and cost-effective operation. One of the greatest challenges is the collection of hydrogen gas from millions of PEC cells distributed in the solar field. In this work, a separate-cell PEC system with decoupled hydrogen and oxygen cells was designed for centralized hydrogen production, using 100 cm 2 hematite (-Fe 2 O 3) photoanodes and nickel hydroxide (Ni(OH) 2) / oxyhydroxide (NiOOH) electrodes as redox mediators. The operating conditions of the system components and their configuration were optimized for daily cycles, and ten 8.3 h cycles were carried out under solar simulated illumination without additional bias at an average short-circuit current of 55.2 mA. These results demonstrate successful operation of a decoupled PEC water splitting system with separate hydrogen and oxygen cells.

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“…where JSC is the short circuit current density, ηF is the Faradaic efficiency for H2 evolution and Pin is the power of the incident radiation (which is measured at AM1.5G condition). 37,38 Solarto-fuel (STF) efficiency (STF) is the equivalent definition applied to products different than hydrogen. These FoMs are defined for the whole device, so they do not provide information about the occurring physico-chemical processes and how to improve the resulting performances.…”

Section: Introductionmentioning

confidence: 99%