Photoelectrochemical (PEC) analysis of ZnO/Al photoelectrodes and its photocatalytic activity for hydrogen production

Rabell, G. Ortiz; Cruz, M.R. Alfaro; Juárez-Ramírez, Isaías

doi:10.1016/j.ijhydene.2021.12.107

Cited by 37 publications

(13 citation statements)

References 69 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The introduction of 25 wt.% of MoS2 led to an increase in the reaction rate and the photocurrent generation, while the ratio of the number of electrons used for the photocatalytic hydrogen evolution to the number of electrons taking part in the photoelectrochemical processes was the same. The introduction of Al to zinc oxide (up to 5 wt.%) improved the target characteristics, while the Q1' criteria were the same within experimental error [71] as shown in Figure 5.…”

Section: Figurementioning

confidence: 72%

Application of the similarity theory to analysis of photocatalytic hydrogen production and photocurrent generation

Markovskaya

Kozlova

2023

Chim.Tech.Acta

View full text Add to dashboard Cite

In this research some methods of the similarity theory were quantitatively applied to the description of the relationship between the efficiencies of the photocatalytic hydrogen production and photocurrent generation for the first time. Two possible similarity criteria, namely, such as the ratio of the number of electrons involved in the photocatalytic reaction to the generation of photocurrent ones and the ratio of energies transformed in the case of photocatalytic hydrogen evolution to the photocurrent, were obtained by the dimensional analysis. The literature data allow checking the first criterion. The application of the first possible similarity criterion to the samples with different chemical nature, solid solutions, series, in which the synthesis time or the ratio of catalyst components, electrolyte amount or its nature is changed, was analyzed. It was shown that the ratio of electrons may serve as the similarity criterion only under the conditions of geometric and physical similarities.

show abstract

Section: Figurementioning

confidence: 72%

Application of the similarity theory to analysis of photocatalytic hydrogen production and photocurrent generation

Markovskaya

Kozlova

2023

Chim.Tech.Acta

View full text Add to dashboard Cite

show abstract

“…Along with the advantages, zinc oxide has a serious disadvantage, which manifests itself in uncontrollable conductivity [ 41 , 42 ]. To solve this problem, a number of strategies have been proposed, such as a variation in the methods of synthesis [ 43 ] and obtaining double [ 44 ] and ternary structures [ 45 , 46 ]. As a rule, ZnO needs enhanced light collection due to its wide band gap.…”

Section: Photoelectrodesmentioning

confidence: 99%

Operando Photo-Electrochemical Catalysts Synchrotron Studies

et al. 2022

View full text Add to dashboard Cite

The attempts to develop efficient methods of solar energy conversion into chemical fuel are ongoing amid climate changes associated with global warming. Photo-electrocatalytic (PEC) water splitting and CO2 reduction reactions show high potential to tackle this challenge. However, the development of economically feasible solutions of PEC solar energy conversion requires novel efficient and stable earth-abundant nanostructured materials. The latter are hardly available without detailed understanding of the local atomic and electronic structure dynamics and mechanisms of the processes occurring during chemical reactions on the catalyst–electrolyte interface. This review considers recent efforts to study photo-electrocatalytic reactions using in situ and operando synchrotron spectroscopies. Particular attention is paid to the operando reaction mechanisms, which were established using X-ray Absorption (XAS) and X-ray Photoelectron (XPS) Spectroscopies. Operando cells that are needed to perform such experiments on synchrotron are covered. Classical and modern theoretical approaches to extract structural information from X-ray Absorption Near-Edge Structure (XANES) spectra are discussed.

show abstract

“…These materials should be able to match the solar spectrum and have efficient photoexcited charge separation properties to minimize electron-hole recombination. [4][5] Among the various photoelectrodes that have been investigated, silicon (Si) semiconductor stands out as a particularly attractive option. Si is one of the most abundant elements on earth and has been extensively studied due to its relatively narrow band gap to effectively absorb visible light.…”

Section: Introductionmentioning

confidence: 99%

Tailoring Second Coordination Sphere for Tunable Solid–Liquid Interfacial Charge Transfer toward Enhanced Photoelectrochemical H₂ Production

Hu,

Zhou,

Gong

et al. 2024

Angewandte Chemie

View full text Add to dashboard Cite

The recombination of photogenerated charge carriers severely limits the performance of photoelectrochemical (PEC) H2 production. Here, we demonstrate that this limitation can be overcome by optimizing the charge transfer dynamics at the solid‐liquid interface via molecular catalyst design. Specifically, the surface of a p‐Si photocathode is modulated using molecular catalysts with different metal atoms and organic ligands to improve H2 production performance. Co(pda‐SO3H)2 is identified as an efficient and durable catalyst for H2 production through the rational design of metal centers and first/second coordination spheres. The modulation with Co(pda‐SO3H)2, which contains an electron‐withdrawing ‐SO3H group in the second coordination sphere, elevates the flat‐band potential of the polished p‐Si photocathode and nanoporous p‐Si photocathode by 81 mV and 124 mV, respectively, leading to the maximized energy band bending and the minimized interfacial carrier transport resistance. Consequently, both the two photocathodes achieve the Faradaic efficiency of more than 95% for H2 production, which is well maintained during 18 h and 21h reaction, respectively. This work highlights that the band‐edge engineering by molecular catalysts could be an important design consideration for semiconductor‐catalyst hybrids toward PEC H2 production.

show abstract

Photoelectrochemical (PEC) analysis of ZnO/Al photoelectrodes and its photocatalytic activity for hydrogen production

Cited by 37 publications

References 69 publications

Application of the similarity theory to analysis of photocatalytic hydrogen production and photocurrent generation

Application of the similarity theory to analysis of photocatalytic hydrogen production and photocurrent generation

Operando Photo-Electrochemical Catalysts Synchrotron Studies

Tailoring Second Coordination Sphere for Tunable Solid–Liquid Interfacial Charge Transfer toward Enhanced Photoelectrochemical H₂ Production

Contact Info

Product

Resources

About

Photoelectrochemical (PEC) analysis of ZnO/Al photoelectrodes and its photocatalytic activity for hydrogen production

Cited by 37 publications

References 69 publications

Application of the similarity theory to analysis of photocatalytic hydrogen production and photocurrent generation

Application of the similarity theory to analysis of photocatalytic hydrogen production and photocurrent generation

Operando Photo-Electrochemical Catalysts Synchrotron Studies

Tailoring Second Coordination Sphere for Tunable Solid–Liquid Interfacial Charge Transfer toward Enhanced Photoelectrochemical H2 Production

Contact Info

Product

Resources

About

Tailoring Second Coordination Sphere for Tunable Solid–Liquid Interfacial Charge Transfer toward Enhanced Photoelectrochemical H₂ Production