Relation between the nature of the surface facets and the reactivity of Cu2O nanostructures anchored on TiO2NT@PDA electrodes in the photoelectrocatalytic conversion of CO2 to methanol

Torquato, Lilian Danielle de Moura; Pastrián, Fabián Andree Cerda; Perini, João Angelo Lima; Irikura, Kallyni; Batista, Ana Paula de Lima; Oliveira-Filho, Antonio G. S. de; Torresi, Susana I. Córdoba de; Zanoni, María Valnice Boldrin

doi:10.1016/j.apcatb.2019.118221

Cited by 61 publications

(17 citation statements)

References 78 publications

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“…Reactive exposing facet with amount of unsaturated coordinated atoms can facilitate the catalytic reactions, and facet junction with coexposed anisotropic facets allows spatial separation of photogenerated electrons and holes. [ 146–148 ] In addition, creating acid–base sites or vacancy and ionic modification on the surface are capable of promoting light absorption, charge separation, and CO 2 activation. [ 149–151 ] 4) Schottky junction and Z‐scheme junction are typical and efficient heterojunctions that can well engineer the interface structure.…”

Section: Overview Of Photocatalysts For Co2 Reductionmentioning

confidence: 99%

Inside‐and‐Out Semiconductor Engineering for CO₂ Photoreduction: From Recent Advances to New Trends

et al. 2020

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Photocatalytic CO2 reduction attracts substantial interests for the production of chemical fuels via solar energy conversion, but the activity, stability, and selectivity of products were severely determined by the efficiencies of light harvesting, charge migration, and surface reactions. Structural engineering is a promising tactic to address the aforementioned crucial factors for boosting CO2 photoreduction. Herein, a timely and comprehensive review focusing on the recent advances in photocatalytic CO2 conversion based on the design strategies over nano‐/microstructure, crystalline and band structure, surface structure and interface structure is provided, which covers both the thermodynamic and kinetic challenges in CO2 photoreduction process. The key parameters essential for tailoring the size, morphology, porosity, bandgap, surface, or interfacial properties of photocatalysts are emphasized toward the efficient and selective conversion of CO2 into valuable chemicals. New trends and strategies in the structural design to meet the demands for prominent CO2 photoreduction activity are also introduced. It is expected to furnish a comprehensive guideline for inside‐and‐out design of state‐of‐the‐art photocatalysts with well‐defined structures for CO2 conversion.

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Section: Overview Of Photocatalysts For Co2 Reductionmentioning

confidence: 99%

Inside‐and‐Out Semiconductor Engineering for CO₂ Photoreduction: From Recent Advances to New Trends

et al. 2020

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“…Torquato et al. have performed a detailed study to explore the effect of the morphology of Cu 2 O nanoparticles on the photoelectrocatalytic and photocatalytic conversion of CO 2 to methanol . The synthesis process started with the fabrication of a TiO 2 nanotube array electrode by anodization of a TiO 2 foil in a NaH 2 PO 4 /HF mixture.…”

Section: Miscellaneous Transformationsmentioning

confidence: 99%

Polydopamine – its Prolific Use as Catalyst and Support Material

Molnár

2020

ChemCatChem

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Polydopamine is a mussel-inspired functional material with a unique ability to form surface coatings. It is a green, environmentally benign product available very easily for a multitude of varied applications. This review attempts to collect useful information with respect to polydopamine-based catalytic studies with the use of polydopamine and modified polydopamine preparations loaded with varied catalytically active species including metal ions and metal particles. Major sections are about the use of polydopamine as catalyst material, utilization of immobilized enzymes, removal of toxic materials, results in organic synthesis, and fuel cell applications. A few examples of chiral catalysis and results of recycling studies are also treated. Data collected and analyzed indicate the importance and high potential of polydopamine-based catalysts in sustainable chemistry. of subunits attacked by an immobilized cyclohexeneamine (5) was suggested to be the transition state of CÀ C bond formation.Edouard et al. prepared catalyst 0.29 % PDA/PU by depositing PDA onto polyurethane foam (PU, 180 � 20 mg, 8 cm 3 ) and used it for the reduction of methylene blue (MB) with NaBH 4 . [48] Activities decreased gradually with repeated uses from 100 % to 35 % in run 11 but partial reactivation was achieved upon keeping the sample at 67°C for 8 h (55 % dropping below 10 % in run 13). Exposure to air at room temperature for six days proved to be somewhat more beneficial (90 % conversion in run 14 decreasing to 48 % in run 18). In a recent study they fabricated two oxidized PDA/PU samples and then loaded them with NaBH 4 . [49] One made by the usual method (dopamine/Tris, rt, 12 h, in air; sample PDA O2 PU), whereas the other was made by treating PU in a mixture of dopamine, NaOAc, and NaIO 4 (pH 5, rt, 24 h). The sample was dried (67°C) and washed thoroughly with water (PDA NaIO4 PU). Both products were dipped into an aqueous solution of NaBH 4 (0.1 M, 10 min) to afford boron contents of 2.37 and 2.11 wt%. The catalysts tested in the degradation of MB showed high activities with efficiencies of 97 % and 98 %, respectively (NaBH 4 /MB molar ratio 40, 177 mg and 209 mg catalysts, 25 min). During five reuses, the pH of the reaction medium increased because of boron loss (0.78 wt% and 0.81 wt%). The activity of PDA NaIO4 PU decreased to 89 % in run five. However, dipping the used sample into a 0.1 M NaBH 4 solution restored the original efficiency of 98 %. This, however, was only a temporary remedy, since a low efficiency of 60 % was measured in run 10. PDA was suggested by the authors to act as a redox mediator to prevent the hydrolysis/oxidation of immobilized borohydride.This formula (5) should be moved up and placed before the paragraph starting with "Edouard et al…"The Zuo group used PDA particles (avg. diameter 240 nm) to induce the reduction of MB and rhodamine B (RhB) with NaBH 4 . [50] Quinone moieties of PDA were assumed to channel electrons from NaBH 4 to the dyes. Indeed, PDA oxidized with NaIO 4 exhibited increased degradatio...

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“…Today, the continuous progress of social civilization has consumed a large amount of energy, while the energy supply mode based on fossil fuel combustion will lead to a large amount of CO 2 emission . As a well-known greenhouse gas, the excessive emission of CO 2 will cause serious environmental problems such as global temperature rise, melting of glaciers, and extreme weather. , To solve the contradiction between energy consumption and environmental protection, researchers have proposed a green and environmentally friendly way, which converts CO 2 to CH 4 , CO, or other fuel with artificial catalysts under solar irradiation. − …”

Section: Introductionmentioning

confidence: 99%

Enhanced Charge Separation in NiO and Pd Co-Modified TiO₂ Photocatalysts for Efficient and Selective Photoreduction of CO₂

Lan

Pang

2021

ACS Appl. Energy Mater.

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Photocatalytic reduction of CO 2 has been a challenge for some time because this complex reaction produces multiple products, some of which require a high electron density around the active sites to drive the multi-electron reduction. Herein, a Pd-NiO/TiO 2 catalyst was prepared by hydrothermal production of anatase TiO 2 nanosheets, followed by chemical deposition of NiO and photoreduction of Pd. The introduction of NiO to TiO 2 formed a p−n junction, whose internal electric field drives the migration of holes to NiO. Meanwhile, the introduction of Pd to TiO 2 formed a Schottky junction, which facilitated the photo-generated electron transfer from TiO 2 to Pd. The directional migration of electrons and holes significantly enhanced the charge separation and generated high electron density on Pd, which efficiently and selectively reduced CO 2 to CH 4 .

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Relation between the nature of the surface facets and the reactivity of Cu2O nanostructures anchored on TiO2NT@PDA electrodes in the photoelectrocatalytic conversion of CO2 to methanol

Cited by 61 publications

References 78 publications

Inside‐and‐Out Semiconductor Engineering for CO₂ Photoreduction: From Recent Advances to New Trends

Inside‐and‐Out Semiconductor Engineering for CO₂ Photoreduction: From Recent Advances to New Trends

Polydopamine – its Prolific Use as Catalyst and Support Material

Enhanced Charge Separation in NiO and Pd Co-Modified TiO₂ Photocatalysts for Efficient and Selective Photoreduction of CO₂

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Relation between the nature of the surface facets and the reactivity of Cu2O nanostructures anchored on TiO2NT@PDA electrodes in the photoelectrocatalytic conversion of CO2 to methanol

Cited by 61 publications

References 78 publications

Inside‐and‐Out Semiconductor Engineering for CO2 Photoreduction: From Recent Advances to New Trends

Inside‐and‐Out Semiconductor Engineering for CO2 Photoreduction: From Recent Advances to New Trends

Polydopamine – its Prolific Use as Catalyst and Support Material

Enhanced Charge Separation in NiO and Pd Co-Modified TiO2 Photocatalysts for Efficient and Selective Photoreduction of CO2

Contact Info

Product

Resources

About

Inside‐and‐Out Semiconductor Engineering for CO₂ Photoreduction: From Recent Advances to New Trends

Inside‐and‐Out Semiconductor Engineering for CO₂ Photoreduction: From Recent Advances to New Trends

Enhanced Charge Separation in NiO and Pd Co-Modified TiO₂ Photocatalysts for Efficient and Selective Photoreduction of CO₂