Precision loading of Pd on Cu species for highly selective CO2 photoreduction to methanol

Shang, Xiaofang; Li, Guojun; Wang, Ruonan; Xie, Tian; Ding, Jie; Zhong, Qin

doi:10.1016/j.cej.2022.140805

Cited by 16 publications

(7 citation statements)

References 49 publications

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“…TiO 2 exists in three typical crystal phases (rutile, anatase, and brookite) in the natural environment. Rutile is considered as the most stable phase among all three phases, whereas anatase as well as brookite have the ability to undergo irreversible exothermic reaction on the application of thermal treatment and, eventually, lead to the formation of the rutile phase. − The interaction between TiO 2 and adsorbed metal atoms can cause efficient transfer of charge from a single metal atom to the support, trigger the formation of oxygen vacancies as well as Ti 3+ sites on the surface of TiO 2 , and eventually lead to active interfaces …”

Section: Types Of Supports Used For Cu Sacsmentioning

confidence: 99%

Recent Advancements in the Preparation and Application of Copper Single-Atom Catalysts

Syal

Kumar

Gupta

2023

ACS Appl. Nano Mater.

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Single-atom catalysts (SACs) have developed as a potential advanced variety of catalysts wherein copper SACs (Cu SACs) have appeared as a rising star in catalysis in which promising catalytic activity is achieved by a well-adjusted d-band center. Herein, the most recent advancements in the synthesis of copper SACs are highlighted. Various electrocatalytic applications such as carbon dioxide reduction reaction, oxygen reduction reaction, nitrogen reduction reaction, biotherapeutic applications, coupling reactions, hydroxylation, hydrogenation, photocatalytic reactions, and other miscellaneous reactions of Cu SACs coordinated into different supports have been thoroughly reviewed, and the stability and electrocatalytic performance of Cu SACs in fuel cells, zinc–CO2 batteries, and zinc–air batteries have been discussed. This review summarizes the study of most recent developments in the synthesis and applications of Cu SACs.

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Section: Types Of Supports Used For Cu Sacsmentioning

confidence: 99%

Recent Advancements in the Preparation and Application of Copper Single-Atom Catalysts

Syal

Kumar

Gupta

2023

ACS Appl. Nano Mater.

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“…Inspired by the doping-induced charge polarized active sites, introducing heteroatoms on the surface (loading engineering) of catalysts may be a potential strategy to cause the charge polarization of active sites. , That is because the loaded metal atoms may have a powerful interaction with the neighboring atoms in the substrate to result in charge polarization. As shown in Figure a, if two different metal atoms are loaded on catalysts, more highly polarized charges may be created around these two metal atoms.…”

Section: Engineering Charge Polarized Active Sites For Boosting C–c C...mentioning

confidence: 99%

Fundamentals and Challenges of Engineering Charge Polarized Active Sites for CO₂ Photoreduction toward C₂ Products

Wu,

Hu,

Chen

et al. 2023

Acc. Chem. Res.

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Conspectus Global warming and climatic deterioration are partly caused by carbon dioxide (CO2) emission. Given this, CO2 reduction into valuable carbonaceous fuels is a win–win route to simultaneously alleviate the greenhouse effect and the energy crisis, where CO2 reduction into hydrocarbon fuels by solar energy may be a potential strategy. Up to now, most of the current photocatalysts photoconvert CO2 to C1 products. It is extremely difficult to achieve production of C2 products, which have higher economic value and energy density, due to the kinetic challenge of C–C coupling of the C1 intermediates. Therefore, to realize CO2 photoreduction to C2 fuels, design of high-activity photocatalysts to expedite the C–C coupling is significant. Besides, the current mechanism for CO2 photoreduction toward C2 fuels is usually uncertain, which is possibly attributed to the following two reasons: (1) It is arduous to determine the actual catalytic sites for the C–C coupling step. (2) It is hard to monitor the low-concentration active intermediates during the multielectron transfer step. Most traditional metal-based photocatalysts usually possess charge balanced active sites that have the same charge density. In this aspect, the neighboring C1 intermediates may also show the same charge distribution, which would lead to dipole–dipole repulsion, thus preventing C–C coupling for producing C2 fuels. By contrast, photocatalysts with charge polarized active sites possess obviously different charge distributions in the adjacent C1 intermediates, which can effectively suppress the electrostatic repulsion to steer the C–C coupling. Based on this analysis, higher asymmetric charge density on the active sites would be more beneficial to anchoring between the adjacent intermediates and active atoms in catalysts, which can boost C–C coupling. In this Account, we summarize various strategies, including vacancy engineering, doping engineering, loading engineering, and heterojunction engineering, for tailoring charge polarized active sites to boost the C–C coupling for the first time. Also, we overview diverse in situ characterization technologies, such as in situ X-ray photoelectron spectroscopy, in situ Raman spectroscopy, and in situ Fourier transform infrared spectroscopy, for determining charge polarized active sites and monitoring reaction intermediates, helping to reveal the internal catalytic mechanism of CO2 photoreduction toward C2 products. We hope this Account may help readers to understand the crucial function of charge polarized active sites during CO2 photoreduction toward C2 products and provide guidance for designing and preparing highly active catalysts for photocatalytic CO2 reduction.

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“…As is well known, CO 2 causes a greenhouse effect, environmental pollution, and other problems [ 1 ]. Currently, the conversion of CO 2 into CO, CH 4 , CH 3 OH, HCOOH, etc., by photocatalysis reduction is a promising, new green technology and attracts more and more attention [ 2 , 3 , 4 , 5 , 6 , 7 ]. So far, many photocatalysts have been found, such as metal-, metal oxide-, metal sulfide-, and carbon-based materials, which show high catalytic activity and selectivity [ 8 , 9 , 10 , 11 , 12 , 13 ].…”

Section: Introductionmentioning

confidence: 99%

Synthesis, Structural Characterization, Hirschfeld Surface Analysis, Density Functional Theory, and Photocatalytic CO2 Reduction Activity of a New Ca(II) Complex with a Bis-Schiff Base Ligand

Tai,

Yan,

Wang

2024

Molecules

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A new bis-Schiff base (L) Ca(II) complex, CaL, was synthesized by the reaction of calcium perchlorate tetrahydrate, 1,3-diamino-2-hydroxypropane, and 2-formyl phenoxyacetic acid in an ethanol–water (v:v = 2:1) solution and characterized by IR, UV-vis, TG-DTA, and X-ray single crystal diffraction analysis. The structural analysis indicates that the Ca(II) complex crystallizes in the monoclinic system, space group P121/n1, and the Ca(II) ions are six-coordinated with four O atoms (O8, O9, O11, O12, or O1, O2, O4, O6) and two N atoms (N1, N2, or N3, N4) of one bis-Schiff base ligand. The Ca(II) complex forms a tetramer by intermolecular O-H…O hydrogen bonds. The tetramer units further form a three-dimensional network structure by π–π stacking interactions of benzene rings. The Hirschfeld surface of the Ca(II) complex shows that the H…H contacts represent the largest contribution (41.6%) to the Hirschfeld surface, followed by O…H/H…O and C…H/H…C contacts with contributions of 35.1% and 18.1%, respectively. To understand the electronic structure of the Ca(II) complex, the DFT calculations were carried out. The photocatalytic CO2 reduction test of the Ca(II) complex exhibited a yield of 47.9 μmol/g (CO) and a CO selectivity of 99.3% after six hours.

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Precision loading of Pd on Cu species for highly selective CO2 photoreduction to methanol

Cited by 16 publications

References 49 publications

Recent Advancements in the Preparation and Application of Copper Single-Atom Catalysts

Recent Advancements in the Preparation and Application of Copper Single-Atom Catalysts

Fundamentals and Challenges of Engineering Charge Polarized Active Sites for CO₂ Photoreduction toward C₂ Products

Synthesis, Structural Characterization, Hirschfeld Surface Analysis, Density Functional Theory, and Photocatalytic CO2 Reduction Activity of a New Ca(II) Complex with a Bis-Schiff Base Ligand

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Precision loading of Pd on Cu species for highly selective CO2 photoreduction to methanol

Cited by 16 publications

References 49 publications

Recent Advancements in the Preparation and Application of Copper Single-Atom Catalysts

Recent Advancements in the Preparation and Application of Copper Single-Atom Catalysts

Fundamentals and Challenges of Engineering Charge Polarized Active Sites for CO2 Photoreduction toward C2 Products

Synthesis, Structural Characterization, Hirschfeld Surface Analysis, Density Functional Theory, and Photocatalytic CO2 Reduction Activity of a New Ca(II) Complex with a Bis-Schiff Base Ligand

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Product

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About

Fundamentals and Challenges of Engineering Charge Polarized Active Sites for CO₂ Photoreduction toward C₂ Products