Metal–organic framework coated titanium dioxide nanorod array p–n heterojunction photoanode for solar water-splitting

Yang, Hui; Bright, Joeseph; Kasani, Sujan; Zheng, Peng; Musho, Terence; Chen, Banglin; Huang, Ling; Wu, Nianqiang

doi:10.1007/s12274-019-2272-4

Cited by 85 publications

(39 citation statements)

References 51 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Photoelectrochemical (PEC) water splitting, which converts solar energy into chemical energy through photoactive electrodes, has attracted much attention due to a wide range of sources for the electrodes. Over the last few years, many MOFs have been utilized as cocatalysts [24][25][26] or interlayers at the semiconductor/ electrolyte interface [27,28] to improve photogenerated charge transfer or promote efficient charge injection at the semiconductor/electrolyte interface. In addition to MOFs as cocatalysts or interlayers, photoconductive MOFs have also investigated as photoanodes in photoelectrochemical water splitting.…”

Section: Water Splittingmentioning

confidence: 99%

See 1 more Smart Citation

Conductive MOFs with Photophysical Properties: Applications and Thin-Film Fabrication

Zhuang

Liu

2020

Nano-Micro Lett.

View full text Add to dashboard Cite

HIGHLIGHTS • An overview on photophysical properties of conductive metal-organic frameworks (MOFs) including photoconductivity and photoluminescence is provided. • Miscellaneous applications of MOFs with photophysical properties are discussed. • Recent advances in integration of photoactive MOFs with practical devices are summarized. ABSTRACT Metal-organic frameworks (MOFs) are a class of hybrid materials with many promising applications. In recent years, lots of investigations have been oriented toward applications of MOFs in electronic and photoelectronic devices. While many high-quality reviews have focused on synthesis and mechanisms of electrically conductive MOFs, few of them focus on their photophysical properties. Herein, we provide an in-depth review on photoconductive and photoluminescent properties of conductive MOFs together with their corresponding applications in solar cells, luminescent sensing, light emitting, and so forth. For integration of MOFs with practical devices, recent advances in fabrication of photoactive MOF thin films are also summarized.

show abstract

Section: Water Splittingmentioning

confidence: 99%

“…The film thickness can be well controlled by the number of growth cycles. A p-n heterojunction photoanode for solar water splitting was fabricated by coating a porphyrin-based MOF PCN-225 layer on a vertically aligned TiO 2 nanorod array through layer-by-layer self-assembly [28]. The specific processing is shown in Fig.…”

Section: Layer-by-layer Assemblymentioning

confidence: 99%

Conductive MOFs with Photophysical Properties: Applications and Thin-Film Fabrication

Zhuang

Liu

2020

Nano-Micro Lett.

View full text Add to dashboard Cite

show abstract

“…This TiO 2 /MOF photoanode array was vertically aligned on a FTO electrical contact, enabling an extended optical path-length along the longer path of nanorods while retaining a short path-length for hole transport improving photogenerated electrons extraction. 90…”

Section: Evaluation Parametersmentioning

confidence: 99%

Recent advancements in MOF‐ based catalysts for applications in electrochemical and photoelectrochemical water splitting: A review

et al. 2020

View full text Add to dashboard Cite

Summary A significant interest in the exploration of clean and renewable alternative energy resources has been observed in recent years to combat environmental pollution and energy shortages for a sustainable future. In this regard, hydrogen is clean, energy‐rich fuel with unlimited potential. It can be produced via water‐splitting process using the most abundant resources on earth, that is, water and solar/electrical energy. Metal‐organic frameworks (MOFs) are a category of porous crystalline materials with well‐organized structures and unique catalytic, optical, and electrical properties. MOFs and MOF‐derived materials have proved to be excellent catalysts for water‐splitting both by electrochemical and photoelectrochemical (PEC) routes. Furthermore, photochemical and electrochemical capabilities of these MOFs can be fine‐tuned to maximize their performance by modification in the bandgap, surface area, current density, electrochemical active surface area, and overpotential, through tailoring of the organic ligands and/or metal centers. A number of works have been dedicated to this quest resulting in promising and very effective results. Such as for photoelectrocatalysis, a composite nanorod array of TiO2/Co‐MOF acting as photoanode achieved one of the highest photocurrent densities of 2.93 mA/cm2 at 1.23 V (vs reverse hydrogen electrode [RHE]). In another study, MOF‐derived Co3C‐3/TiO2 photoanode attained the photocurrent density of 2.6 mA/cm2 at 1.23 V vs RHE. For electrocatalysis, Fe2O3/Ni‐MOF‐74 exhibited oxygen evolution reaction overpotential of 264 mV to reach 10 mA/cm2 of current density with a low Tafel plot of 48 mV/dec. Another novel material derived from MOF, MoO2‐PC‐rGO displayed a Tafel Plot of 41 mV/dec. Even though this field is in its infancy phase, it is attracting increased attention for promising results suggesting extraordinary potential for practical applications. Focus of this review article is on the overview of the development of MOFs for application in electrocatalytic and photoelectrocatalytic water‐splitting for hydrogen production. This review intends to provide a timely reference and insight for the advancement in catalysts based on MOFs for practical electrochemical and PEC water‐splitting in a clear and comprehensive manner. Starting with the brief introduction, fundamentals, factors affecting catalytic efficiency and evaluation parameters of water‐splitting are summarized followed by synthesis strategies and recent progress made by MOF‐based catalysts for PEC and electrochemical water‐splitting.

show abstract

“…The interface of heterogeneous catalysis plays a key role in catalytic reactions, and the catalytic path is governed by controlling the atomic and electronic structure of interface. Thus, tuning the interface of nanoparticles provides a versatile route for optimization of heterogeneous catalysts, [1][2][3][4][5][6][7][8] and interface design is one of the most significant and promising motivations to boost the electrochemical reactions. [9] Hydrogen has the highest gravimetric energy density among all the chemical fuels, [10] and is thus hailed as the ultimate clean energy carrier.…”

Section: Introductionmentioning

confidence: 99%

Interface Engineering of Partially Phosphidated Co@Co–P@NPCNTs for Highly Enhanced Electrochemical Overall Water Splitting

Jiao

Yang

Pan

et al. 2020

Small

View full text Add to dashboard Cite

Interface engineering is promising but still challenging for developing highly efficient and stable non‐noble‐metal‐based electrocatalysts for water splitting. Herein, partially phosphidated core@shell Co@Co–P nanoparticles encapsulated in bamboo‐like N, P co‐doped carbon nanotubes (denoted as Part‐Ph Co@Co–P@NPCNTs) are prepared through a pyrolysis–oxidation–phosphidation strategy. In this structure, each Co nanoparticle is covered with a thin Co–P layer to form a special core@shell heterojunction interface, and the core@shell structure is further encapsulated by N, P co‐doped CNTs that not only protect the Co from corrosion but also guarantee an effective and fast electron transfer on cobalt phosphide. As a bifunctional catalyst for both the hydrogen evolution reaction and oxygen evolution reaction, it exhibits an excellent activity for overall water splitting, and enables long‐term operation without significant degradation. Density functional theory calculations demonstrate that the interface of the Co/Co2P heterojunction could lower the values of ΔGH* (hydrogen adsorption) and ΔGB (water dissociation), which are negatively correlated to the j10, because of the electronic structures of up‐shifted d‐band center. This study not only presents an efficient and stable electrocatalyst for overall water splitting but also provides a special route for the interface engineering of heterostructures.

show abstract

Metal–organic framework coated titanium dioxide nanorod array p–n heterojunction photoanode for solar water-splitting

Cited by 85 publications

References 51 publications

Conductive MOFs with Photophysical Properties: Applications and Thin-Film Fabrication

Conductive MOFs with Photophysical Properties: Applications and Thin-Film Fabrication

Recent advancements in MOF‐ based catalysts for applications in electrochemical and photoelectrochemical water splitting: A review

Interface Engineering of Partially Phosphidated Co@Co–P@NPCNTs for Highly Enhanced Electrochemical Overall Water Splitting

Contact Info

Product

Resources

About