Electrostatic charge transfer for boosting the photocatalytic CO2 reduction on metal centers of 2D MOF/rGO heterostructure

Mu, Qiaoqiao; Wang, Zhu; Li, Xian; Zhang, Chufeng; Su, Yanhui; Lian, Yuebin; Qi, Pengwei; Deng, Zhao; Zhang, Duo; Wang, Shuao; Zhu, Xing; Peng, Yang

doi:10.1016/j.apcatb.2019.118144

Cited by 186 publications

(87 citation statements)

References 55 publications

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“…25d indicates that the fermi level (E F ) value of GR is lower than the lowest unoccupied molecular orbital (LUMO) value of [Ru(bpy) 3 ] Cl 2 and higher than the E F value of Ni(OH) 2 ( Supplementary Note 12). Therefore, the high carrier mobility and well-aligned energy levels of GR enable it to efficiently facilitate electron transfer from photosensitizers to Ni(OH) 2 51,56 . On the basis of the above analysis, a possible reaction mechanism for the CO 2 photoreduction over Ni(OH) 2 -10%GR composite has been proposed.…”

Section: Mechanism Of Enhanced Photocatalyticmentioning

confidence: 99%

Rationally designed transition metal hydroxide nanosheet arrays on graphene for artificial CO2 reduction

et al. 2020

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The performance of transition metal hydroxides, as cocatalysts for CO2 photoreduction, is significantly limited by their inherent weaknesses of poor conductivity and stacked structure. Herein, we report the rational assembly of a series of transition metal hydroxides on graphene to act as a cocatalyst ensemble for efficient CO2 photoreduction. In particular, with the Ru-dye as visible light photosensitizer, hierarchical Ni(OH)2 nanosheet arrays-graphene (Ni(OH)2-GR) composites exhibit superior photoactivity and selectivity, which remarkably surpass other counterparts and most of analogous hybrid photocatalyst system. The origin of such superior performance of Ni(OH)2-GR is attributed to its appropriate synergy on the enhanced adsorption of CO2, increased active sites for CO2 reduction and improved charge carriers separation/transfer. This work is anticipated to spur rationally designing efficient earth-abundant transition metal hydroxides-based cocatalysts on graphene and other two-dimension platforms for artificial reduction of CO2 to solar chemicals and fuels.

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Section: Mechanism Of Enhanced Photocatalyticmentioning

confidence: 99%

Rationally designed transition metal hydroxide nanosheet arrays on graphene for artificial CO2 reduction

et al. 2020

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“…The intimate contact of 2D MOFs and rGO matrix created a coherent energy flow, by which the rapid interfacial transfer of photoinduced electrons from rGO to MOF lattices elevated the charge density around metal centers, facilitating the in situ CO 2 reduction (Figure 8f). [ 168 ]…”

Section: Hybrid Constructionmentioning

confidence: 99%

Engineering 2D Photocatalysts toward Carbon Dioxide Reduction

Zhou

Wang

Huang

et al. 2021

Advanced Energy Materials

158

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As a way to drive chemical reactions by renewable solar energy, photocatalytic technology is an appealing strategy for carbon recycle and value‐added CO2 utilization mimicking the natural photosynthetic system to remedy energy and environmental problems. During the recent decades of exploration, extensive research has been reported on 2D nanomaterials in photocatalytic CO2 reduction because of their unique structural properties. This review highlights the ongoing development of modification strategies for 2D nanomaterials from the viewpoints of defect engineering, surface modification, and hybrid construction, following the sequence of inside‐to‐outside design of the photocatalysts. These methodologies can expand the scope of light absorption, promote the separation of photogenerated charge carriers, and enhance the adsorption and activation of CO2, thus effectively improve the photocatalytic efficiency. The future challenges and opportunities for developing modified 2D photocatalysts are also discussed. It is hoped that this review can provide useful guidelines toward further research on 2D nanocatalysis for CO2 photocatalytic conversion.

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“…[114] This work highlights the ability of MOF-semiconductor heterojunctions in not only facilitating the electron migration via the NP-MOF interfaces but also enhancing the CO 2 photocatalytic activity because of the plasmonic resonance stemming from NP-MOF composites. This work, in addition to many others, also casts light on using the MOF composites, including metal-transition-based-semiconductor/MOFs, [115][116][117][118][119] quantumdot/MOFs, [120,121] and conjugation-polymer/MOFs [122][123][124][125] for enhancing the photo catalytic reduction of CO 2 .…”

Section: Mof Compositesmentioning

confidence: 99%

Reticular Materials for Artificial Photoreduction of CO₂

Nguyen

2020

Advanced Energy Materials

102

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fatally affects the natural greenhouse. Therefore, seeking solutions that ameliorate fossil fuel dependency and CO 2 emission undoubtedly is of urgency. [4] The carbon cycle including selective CO 2 capture, [5] sequestration, [6] and conversion [7] has been used for years to deal with the issues mentioned above. Unlike the capture and sequestration, which have been successfully explored using a variety of porous materials, [8] CO 2 conversion, in which CO 2 is used as C1 starting material for the chemical transformation into other useful feedstocks, is in the early stage of development because there is a lack of effective catalysts and/or optimized conversion processes; therefore, the CO 2 reduction becomes one of the most important but challenging tasks. [9] To cope with this crucial challenge, it is necessary to briefly review the natural photosynthesis, [10] which plants, algae, and/or bacteria capture sunlight and use its photon energy to reduce CO 2 into oxygen (Scheme 1). Notably, in the oxygenic photosynthesis conducted by plants, O 2 and water molecules (six molecules of each) are formed as equivalent as CO 2 input (six molecules). This photosynthesis process not only reintroduces the breathable oxygen but also inspires researchers in imitating the natural photoreduction of CO 2 into clean-burning fuels. The reduction of CO 2 using catalysts activated by sunlight, the universal photon energy from Nature, termed photocatalysis is of great importance for renewable energy. In 1972, Fujishima and Honda discovered the application of TiO 2 as a semiconductor for water hydrolysis under ultraviolet irradiation. [11] This work has influentially underpinned scientists to artificially synthesize many kinds of photocatalytic materials for the transformation of CO 2 under ultraviolet or visible light irradiation, of which the latter is more applicable and important due to its environmental friendly attributes. [12-14] To date, semiconductors commonly used for photocatalysis are TiO 2 , metal alloys, nanowires, quantum dots, graphenebased composites, and to name but a few. [15-17] Among them, porous crystalline materials have been proven to be promising candidates for the CO 2 photoreduction into high value-added chemicals because of their large internal surface area and densely catalytically active sites. [18,19] Particularly, reticular chemistry of metal-organic frameworks (MOFs) possessing endless possibilities to precisely control crystal structures

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Electrostatic charge transfer for boosting the photocatalytic CO2 reduction on metal centers of 2D MOF/rGO heterostructure

Cited by 186 publications

References 55 publications

Rationally designed transition metal hydroxide nanosheet arrays on graphene for artificial CO2 reduction

Rationally designed transition metal hydroxide nanosheet arrays on graphene for artificial CO2 reduction

Engineering 2D Photocatalysts toward Carbon Dioxide Reduction

Reticular Materials for Artificial Photoreduction of CO₂

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Electrostatic charge transfer for boosting the photocatalytic CO2 reduction on metal centers of 2D MOF/rGO heterostructure

Cited by 186 publications

References 55 publications

Rationally designed transition metal hydroxide nanosheet arrays on graphene for artificial CO2 reduction

Rationally designed transition metal hydroxide nanosheet arrays on graphene for artificial CO2 reduction

Engineering 2D Photocatalysts toward Carbon Dioxide Reduction

Reticular Materials for Artificial Photoreduction of CO2

Contact Info

Product

Resources

About

Reticular Materials for Artificial Photoreduction of CO₂