Preparation of Pd–Au/TiO2–WO3 to enhance photoreduction of CO2 to CH4 and CO

Zhu, Zhen; Huang, Wei-Ru; Chen, Chin-Yuan; Wu, Ren‐Jang

doi:10.1016/j.jcou.2018.10.006

Cited by 48 publications

(18 citation statements)

References 33 publications

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“…All CO production rates decrease after reaching their maxima and remain stable for 10 h thus demonstrating excellent catalytic stability. Maximum (3000 μmol g cat –1 h –1 ) and average (2350 μmol g cat –1 h –1 ) activity rates over 10 h for the hydrazine-treated PEDOT catalyst are state-of-the-art. , Our performance is 2 orders of magnitude higher than the top rated single catalyst and is surpassed by only three other cocatalyst systems (Figure G). ,,− …”

Section: Resultsmentioning

confidence: 90%

Single PEDOT Catalyst Boosts CO₂ Photoreduction Efficiency

et al. 2021

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Atmospheric pollution demands the development of solar-driven photocatalytic technologies for the conversion of CO 2 into a fuel; state-of-the-art cocatalyst systems demonstrate conversion efficiencies currently unattainable by a single catalyst. Here, we upend the status quo demonstrating that the nanofibrillar conducting polymer poly(3,4-ethylenedioxythiophene) (PEDOT) is a record-breaking single catalyst for the photoreduction of CO 2 to CO. This high catalytic efficiency stems from a highly conductive nanofibrillar structure that significantly enhances surface area, CO 2 adsorption and light absorption. Moreover, the polymer’s band gap is optimized via chemical doping/dedoping treatments using hydrochloric acid, ammonia hydroxide, and hydrazine. The hydrazine-treated PEDOT catalyst exhibits 100% CO yield under a stable regime (>10 h) with a maximum rate of CO evolution (3000 μmol g cat –1 h –1 ) that is 2 orders of magnitude higher than the top performing single catalyst and surpassed only by three other cocatalyst systems. Nanofibrillar PEDOT provides a new direction for designing the next generation of high-efficiency photoreduction catalysts.

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Section: Resultsmentioning

confidence: 90%

Single PEDOT Catalyst Boosts CO₂ Photoreduction Efficiency

et al. 2021

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“…These quantities of Pd/TiO 2 coated on netlike glass disc were measured by an electric balance comparing the weights of several samples before and after preparing Pd/TiO 2 film on netlike glass fiber. The photocatalytic activity evaluation using molar quantities of product per weight of photocatalyst was adopted as in the recent photocatalyst studies [44][45][46][47].…”

Section: Si Timentioning

confidence: 99%

Impact of Pd Loading on CO2 Reduction Performance over Pd/TiO2 with H2 and H2O

et al. 2020

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This study investigated the impact of molar ratio of CO2 to reductants H2O and H2, as well as Pd loading weight on CO2 reduction performance with Pd/TiO2 as the photocatalyst. The Pd/TiO2 film photocatalyst is prepared by the sol-gel and dip-coating process to prepare TiO2 film and the pulse arc plasma method is used to dope Pd on TiO2 film. The prepared Pd/TiO2 film was characterized by SEM, EPMA, STEM, EDS, and EELS. This study also investigated the performance of CO2 reduction under the illumination condition of Xe lamp with or without ultraviolet (UV) light. As a result, it is revealed that when the molar ratio of CO2/H2/H2O is set at 1:0.5:0.5, the best CO2 reduction performance has been obtained under the illumination condition of Xe lamp with and without UV light. In addition, it is found that the optimum Pd loading weight is 3.90 wt%. The maximum molar quantities of CO and CH4 produced per unit weight of photocatalyst are 30.3 μmol/g and 22.1 μmol/g, respectively, for the molar ratio of CO2/H2/H2O = 1:0.5:0.5 under the condition of Xe lamp illumination with UV light. With UV light, C2H4 and C2H6, as well as CO and CH4 are also produced by the Pd/TiO2 film photocatalyst prepared in this study.

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“…on a Cu–Pt nanoparticle-supported titania nanotube array photocatalyst exhibited a maximum 14% selectivity toward ethane formation . In all of the reported literature so far, the cocatalyst typically consists of one or more precious metals such as Pt, Au, Ru, and Pd. ,, Herein, we successfully synthesized large-sized, less expensive Ag, Cu, and AgCu nanoparticles and successfully hosted these nanoparticles on a TiO 2 nanotube array (TNTA) scaffold. The results from our experiments demonstrate that the synergetic effect of large (>80 nm) Ag and Cu nanoparticles as cocatalysts in CO 2 photoreduction increases both the efficiency and selectivity of CO 2 photoreduction; a C 2 product, namely, ethane, is generated with an unprecedented selectivity as high as 60%.…”

Section: Introductionmentioning

confidence: 99%

Asymmetric Multipole Plasmon-Mediated Catalysis Shifts the Product Selectivity of CO₂ Photoreduction toward C₂₊ Products

Vahidzadeh

Zeng

Manuel

et al. 2021

ACS Appl. Mater. Interfaces

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is a well-known photocatalyst for the photocatalytic transformation of CO 2 into methane. The formation of C 2+ products such as ethane and ethanol rather than methane is more interesting due to their higher energy density and economic value, but the formation of C−C bonds is currently a major challenge in CO 2 photoreduction. In this context, we report the dominant formation of a C 2 product, namely, ethane, from the gas-phase photoreduction of CO 2 using TiO 2 nanotube arrays (TNTAs) decorated with large-sized (80−200 nm) Ag and Cu nanoparticles without the use of a sacrificial agent or hole scavenger. Isotope-labeled mass spectrometry was used to verify the origin and identity of the reaction products. Under 2 h AM1.5G 1-sun illumination, the total rate of hydrocarbon production (methane + ethane) was highest for AgCu-TNTA with a total C x H 2x+2 rate of 23.88 μmol g −1 h −1 . Under identical conditions, the C x H 2x+2 production rates for Ag-TNTA and Cu-TNTA were 6.54 and 1.39 μmol g −1 h −1 , respectively. The ethane selectivity was the highest for AgCu-TNTA with 60.7%, while the ethane selectivity was found to be 15.9 and 10% for the Ag-TNTA and Cu-TNTA, respectively. Adjacent adsorption sites in our photocatalyst develop an asymmetric charge distribution due to quadrupole resonances in large metal nanoparticles and multipole resonances in Ag−Cu heterodimers. Such an asymmetric charge distribution decreases adsorbate−adsorbate repulsion and facilitates C−C coupling of reaction intermediates, which otherwise occurs poorly in TNTAs decorated with small metal nanoparticles.

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Preparation of Pd–Au/TiO2–WO3 to enhance photoreduction of CO2 to CH4 and CO

Cited by 48 publications

References 33 publications

Single PEDOT Catalyst Boosts CO₂ Photoreduction Efficiency

Single PEDOT Catalyst Boosts CO₂ Photoreduction Efficiency

Impact of Pd Loading on CO2 Reduction Performance over Pd/TiO2 with H2 and H2O

Asymmetric Multipole Plasmon-Mediated Catalysis Shifts the Product Selectivity of CO₂ Photoreduction toward C₂₊ Products

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Preparation of Pd–Au/TiO2–WO3 to enhance photoreduction of CO2 to CH4 and CO

Cited by 48 publications

References 33 publications

Single PEDOT Catalyst Boosts CO2 Photoreduction Efficiency

Single PEDOT Catalyst Boosts CO2 Photoreduction Efficiency

Impact of Pd Loading on CO2 Reduction Performance over Pd/TiO2 with H2 and H2O

Asymmetric Multipole Plasmon-Mediated Catalysis Shifts the Product Selectivity of CO2 Photoreduction toward C2+ Products

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Single PEDOT Catalyst Boosts CO₂ Photoreduction Efficiency

Single PEDOT Catalyst Boosts CO₂ Photoreduction Efficiency

Asymmetric Multipole Plasmon-Mediated Catalysis Shifts the Product Selectivity of CO₂ Photoreduction toward C₂₊ Products