Vacancy enriched ultrathin TiMgAl-layered double hydroxide/graphene oxides composites as highly efficient visible-light catalysts for CO2 reduction

Wang, Kaixuan; Miao, Chenglin; Liu, Yanan; Cai, Luoyu; Jones, Wilm; Fan, Jiaxuan; Li, Dianqing; Feng, Junting

doi:10.1016/j.apcatb.2020.118878

Cited by 63 publications

(32 citation statements)

References 50 publications

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“…Additionally, another mechanism that relies on the strong guest−host electrostatic interaction was reported to be an origin of the lattice defect formation of the LDH. 35 However, the oxygen defect content of Co−Al-LDH−CO 3 2− is found to be lower than that of Co− Al-LDH−NO 3 − (Figure S10), even though Co−Al-LDH− CO 3…”

Section: Resultsmentioning

confidence: 96%

Lattice Engineering to Simultaneously Control the Defect/Stacking Structures of Layered Double Hydroxide Nanosheets to Optimize Their Energy Functionalities

Kim

Shin

et al. 2021

ACS Nano

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An effective lattice engineering method to simultaneously control the defect structure and the porosity of layered double hydroxides (LDHs) was developed by adjusting the elastic deformation and chemical interactions of the nanosheets during the restacking process. The enlargement of the intercalant size and the lowering of the charge density were effective in increasing the content of oxygen vacancies and enhancing the porosity of the stacked nanosheets via layer thinning. The defect-rich Co−Al-LDH−NO 3 − nanohybrid with a small stacking number exhibited excellent performance as an oxygen evolution electrocatalyst and supercapacitor electrode with a large specific capacitance of ∼2230 F g −1 at 1 A g −1 , which is the largest capacitance of carbon-free LDH-based electrodes reported to date. Combined with the results of density functional theory calculations, the observed excellent correlations between the overpotential/capacitance and the defect content/stacking number highlight the importance of defect/stacking structures in optimizing the energy functionalities. This was attributed to enhanced orbital interactions with water/hydroxide at an increased number of defect sites. The present cost-effective lattice engineering process can therefore provide an economically feasible methodology to explore high-performance electrocatalyst/electrode materials.

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Section: Resultsmentioning

confidence: 96%

Lattice Engineering to Simultaneously Control the Defect/Stacking Structures of Layered Double Hydroxide Nanosheets to Optimize Their Energy Functionalities

Kim

Shin

et al. 2021

ACS Nano

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“…For structural design, several interactions (covalent bond, electrostatic force, and Van der Waals' force) can be utilized to provide multiple combination modes for the construction of LDH‐based composites, realizing efficient separation and transfer of photogenerated carriers. Positively charged host layers allow LDHs to self‐assemble with negatively charged species by electrostatic interaction, 74 which facilitates the transfer of electrons through interface, resulting in enhanced carrier separation efficiency. Hwang's group reported the fabrication of several self‐assembled nanohybrids via the electrostatic interaction, selecting exfoliated ZnCr‐LDH as photosensitizer and active catalytic site, and electronegative two‐dimensional materials (titanate 75 and graphene oxide 76 ) or polyoxometalate cluster 77 with suitable band position as photogenerated electron acceptor.…”

Section: Construction Of Efficient Ldh‐based Photocatalystsmentioning

confidence: 99%

Layered double hydroxide‐based photocatalytic materials toward renewable solar fuels production

Bian

Zhang

Zhao

et al. 2021

InfoMat

126

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Photocatalysis is an ideal and promising green technology to drive numerous chemical reactions for valued chemicals production under very mild conditions, thereby providing solutions to global energy and environment issues related to burning fossil fuels. Over the past decade, layered double hydroxides (LDHs), as the members in two‐dimensional materials family, have attracted much attention due to their many advantages in photocatalysis, such as facile synthesis, low cost and powerful tunability of composition. In this review, we provide a synthetic overview of recent research advances of LDH‐based photocatalysts, with the main discussion of the design strategies to improve their photocatalytic performance, including component control, defect engineering, hybridization, and topological transformation. Structure‐performance correlations and tailor‐made material synthesis strategies are elaborated to discuss how to realize high‐performance LDH‐based photocatalysts for three important reactions (i.e., water splitting, CO2 conversion, and N2 reduction) to generate desirable solar fuels. Further, the remaining challenges and future perspectives of LDH‐based photocatalysts are summed up, aiming to inspire brand new solutions for pushing forward the development of LDH‐based photocatalysis.

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“…The selectivity of C 1 products from CO 2 RR is drastically ameliorated as HCO 3 − and CO 2 − can be generated during the reaction process from Ti 3+ –V o and electron‐rich carbon defects. [ 96 ] Furthermore, doping of Ni 3+ onto monolayer–NiTi–LDH also endows the system with improved DOS values around the Fermi level, demonstrating half‐metallic characteristics, whereas its pristine LDH exhibits the classic semiconductor properties, thereby increasing the efficiency of electron transport in the solid phase from the existence of Ni 3+ states. [ 97 ]…”

Section: Modification Of Ldh Photocatalystsmentioning

confidence: 99%

“…As such, this constructs a synergic effect for improved CO 2 RR activity with high C 1 product selectivity. [ 96 ]…”

Section: Applications Of Ldh‐based Photocatalysts For Artificial Photosynthesismentioning

confidence: 99%

Engineering Layered Double Hydroxide–Based Photocatalysts Toward Artificial Photosynthesis: State‐of‐the‐Art Progress and Prospects

Lau

Ong

2021

Solar RRL

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Layered double hydroxide (LDH) is a class of 2D nanomaterials, which endows auspicious properties for ameliorating the photocatalytic performance in the realm of solar‐to‐chemical production stemming from the chemical versatility of their host layers. However, pristine LDH suffers from slow charge‐carrier mobility, high rate of electron–hole recombination as well as a tendency to agglomerate, rendering them unbefitting for practical use. Due to the aforementioned bottlenecks, structural modifications such as thickness tuning, cocatalyst incorporation, semiconductor coupling, and ternary heterostructure engineering have been extensively investigated to elucidate a new lease of landscape to the burgeoning potential of LDHs toward artificial photosynthesis. This review summarizes a panorama of state‐of‐the‐art advancements related to the synthesis and modification of LDH‐based nanocomposites for enhanced physicochemical properties toward boosted photocatalysis. Particularly, their progress in versatile energy applications in photocatalytic water splitting (hydrogen and oxygen evolution), and nitrogen and carbon dioxide reduction reactions will be systematically presented. Insights into band structures, electronic properties, and charge‐carrier dynamics of LDH‐based nanostructures will be discussed to unravel the structure–performance relationship. Finally, this review will prospect the invigorating prospectives and opportunities in engineering next‐generation LDH‐based photocatalysts with augmented performances to pave new inroads at the forefront of this research.

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Vacancy enriched ultrathin TiMgAl-layered double hydroxide/graphene oxides composites as highly efficient visible-light catalysts for CO2 reduction

Cited by 63 publications

References 50 publications

Lattice Engineering to Simultaneously Control the Defect/Stacking Structures of Layered Double Hydroxide Nanosheets to Optimize Their Energy Functionalities

Lattice Engineering to Simultaneously Control the Defect/Stacking Structures of Layered Double Hydroxide Nanosheets to Optimize Their Energy Functionalities

Layered double hydroxide‐based photocatalytic materials toward renewable solar fuels production

Engineering Layered Double Hydroxide–Based Photocatalysts Toward Artificial Photosynthesis: State‐of‐the‐Art Progress and Prospects

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