Stand-alone photoconversion of carbon dioxide on copper oxide wire arrays powered by tungsten trioxide/dye-sensitized solar cell dual absorbers

Nath, Narayan Chandra Deb; Choi, Sung-Deuk; Jeong, Hae Yong; Lee, Jae‐Joon; Park, Hyunwoong

doi:10.1016/j.nanoen.2016.04.025

Cited by 60 publications

(28 citation statements)

References 42 publications

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“…For liquid products, aliquots were analyzed by HPLC (Waters 2695 Separation Module) with a dual absorbance detector (Waters 2487, 210 nm) and a column (BIO‐RAD, Aminex HPX‐87 H, 300 mm×7.8 mm). Detailed analytical methods have been reported previously . To electrochemically characterize planar and porous Bi electrodes, cyclic voltammetry, electrochemical impedance spectroscopy, and Tafel analyses were conducted in CO 2 ‐saturated 0.1 m KHCO 3 solutions with the SCE reference electrode and Pt wire counter electrode (scan rate 5 mV s −1 ).…”

Section: Methodsmentioning

confidence: 99%

“…Detailed analytical methods have been reported previously. [5,24,25] To electrochemically characterize planar and porous Bi electrodes, cyclic voltammetry,e lectrochemical impedance spectroscopy,a nd Tafel analyses were conducted in CO 2 -saturated 0.1 m KHCO 3 solutions with the SCE reference electrode and Pt wire counter electrode (scan rate 5mVs À1 ). The potential range of cyclic voltammograms was À0.55 to À0.40 Vv ersus SCE, and the scan rate was varied from 10 to 100 mV s À1 .T he impedance spectra were obtained by using am ultichannel potentiostat (Ivium) in the frequency range of 100 kHz to 0.01 Hz at potential of À1.5 Vv ersus SCE with an amplitude of 10 mV.…”

Section: Electrochemical Testsand Product Analysismentioning

confidence: 99%

“…Among the many electrocatalysts, Bi has been one of the most widely considered, particularly owing to its high selectivity for formic acid and its anion (formate). For the high‐index planes of Bi, transfer of the first H + /e − pair is slow yet mildly endergonic and leads to adsorbed *OCOH (CO 2 +H + /e − →*OCOH), whereas that of the second H + /e − pair is exergonic and spontaneously releases formic acid (*OCOH+H + /e − →HCOOH) .…”

Section: Introductionmentioning

confidence: 99%

“…Among the many electrocatalysts, [5][6][7] Bi has been one of the most widely considered, particularly owing to itsh igh selectivity for formica cid and its anion (formate). For the high-index planes of Bi, transfer of the first H + /e À pair is slow yet mildly endergonic and leads to adsorbed *OCOH (CO 2 + H + /e À !…”

Section: Introductionmentioning

confidence: 99%

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Ion‐Enhanced Conversion of CO₂ into Formate on Porous Dendritic Bismuth Electrodes with High Efficiency and Durability

et al. 2019

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Facile synthesis of efficient electrocatalysts that can selectively convert CO2 to value‐added chemicals remains a challenge. Herein, the electrochemical synthesis of porous Bi dendrite electrodes and details of their activity toward CO2 conversion to formate in aqueous solutions of bicarbonate are presented. The as‐synthesized multilayered, porous, dendritic Bi electrodes exhibit a faradaic efficiency (FE) of approximately 100 % for formate production. Added halides and cations significantly influence the steady‐state partial current density for formate production JFM (Cl−>Br−≈I−; Cs+>K+>Li+). DFT calculations revealed that the reaction pathway involving the species *OCOH occurs predominantly and the presence of both Cs+ and Cl− makes the overall reaction more spontaneous. Photovoltaic‐cell‐assisted electrocatalysis produced formate with an FE of approximately 95 % (JFM≈10 mA cm−2) at an overall solar conversion efficiency of approximately 8.5 %. The Bi electrodes maintain their activity for 360 h without a change in the surface states.

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Section: Methodsmentioning

confidence: 99%

Section: Electrochemical Testsand Product Analysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Ion‐Enhanced Conversion of CO₂ into Formate on Porous Dendritic Bismuth Electrodes with High Efficiency and Durability

et al. 2019

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“…For the CO2RR, bicarbonate (HCO3 − ) is widely used because of its buffering effect and some synergistic effects. [23][24]29,34 However, the present study used NaOH (Figure 1d). This activity is comparable to those reported in the literature.…”

Section: Electrocatalytic Activities Of N-tec and Bi Electrodesmentioning

confidence: 88%

High-Efficiency Solar Desalination Accompanying Electrocatalytic Conversions of Desalted Chloride and Captured Carbon Dioxide

Kim

Piao

Kim

et al. 2019

ACS Sustainable Chem. Eng.

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The sustainability of conventional water-and energy-associated systems is being examined in terms of water-energy nexus. This study presents a high-efficiency, off-grid solar desalination system for saline water (salinity 10 and g L −1) that accompanies electrocatalytic oxidations of chloride and, consequently, urine via oxidized chlorine species, while concomitantly producing formate from captured CO2. A variable number of desalination cell arrays is placed between a double-layered nanoparticulate titania electrocatalyst (Ti/IrxTa1−xOy/nano-TiO2; denoted as n-TEC) anode and a porous dendrite Bi cathode. A potential bias to the n-TEC and Bi pair initiates the transport of chloride and sodium ions in the saline water to the anode and cathode cells, respectively, at an ion transport efficiency of ~100% and a specific energy consumption of ~1.9 kWh m −3. During the desalination, the n-TEC anode catalyzes the conversion of the transported chloride into reactive chlorine species, which in turn mediate the decomposition of urine in the anode cell. Concurrent with the anodic process, formate is continuously produced at a Faradaic efficiency of >95% from the CO2 captured in the catholyte. When a photovoltaic cell (power conversion efficiency of ~18%) is coupled to the stack device with five desalination cells, the three independent processes synergistically proceed at a maximum overall solar-to-desalination system efficiency ~16% and a maximum solar-toformate chemical energy conversion efficiency of ~7%.

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Electrode Materials Engineering in Electrocatalytic CO₂ Reduction: Energy Input and Conversion Efficiency

et al. 2019

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Electrocatalytic CO2 reduction (ECR) is a promising technology to simultaneously alleviate CO2‐caused climate hazards and ever‐increasing energy demands, as it can utilize CO2 in the atmosphere to provide the required feedstocks for industrial production and daily life. In recent years, substantial progress in ECR systems has been achieved by the exploitation of various novel electrode materials. The anodic materials and cathodic catalysts that have, respectively, led to high‐efficiency energy input and effective heterogenous catalytic conversion in ECR systems are comprehensively reviewed. Based on the differences in the nature of energy sources and the role of materials used at the anode, the fundamentals of ECR systems, including photo‐anode‐assisted ECR systems and bio‐anode‐assisted ECR systems, are explained in detail. Additionally, the cathodic reaction mechanisms and pathways of ECR are described along with a discussion of different design strategies for cathode catalysts to enhance conversion efficiency and selectivity. The emerging challenges and some perspective on both anode materials and cathodic catalysts are also outlined for better development of ECR systems.

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Stand-alone photoconversion of carbon dioxide on copper oxide wire arrays powered by tungsten trioxide/dye-sensitized solar cell dual absorbers

Cited by 60 publications

References 42 publications

Ion‐Enhanced Conversion of CO₂ into Formate on Porous Dendritic Bismuth Electrodes with High Efficiency and Durability

Ion‐Enhanced Conversion of CO₂ into Formate on Porous Dendritic Bismuth Electrodes with High Efficiency and Durability

High-Efficiency Solar Desalination Accompanying Electrocatalytic Conversions of Desalted Chloride and Captured Carbon Dioxide

Electrode Materials Engineering in Electrocatalytic CO₂ Reduction: Energy Input and Conversion Efficiency

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Stand-alone photoconversion of carbon dioxide on copper oxide wire arrays powered by tungsten trioxide/dye-sensitized solar cell dual absorbers

Cited by 60 publications

References 42 publications

Ion‐Enhanced Conversion of CO2 into Formate on Porous Dendritic Bismuth Electrodes with High Efficiency and Durability

Ion‐Enhanced Conversion of CO2 into Formate on Porous Dendritic Bismuth Electrodes with High Efficiency and Durability

High-Efficiency Solar Desalination Accompanying Electrocatalytic Conversions of Desalted Chloride and Captured Carbon Dioxide

Electrode Materials Engineering in Electrocatalytic CO2 Reduction: Energy Input and Conversion Efficiency

Contact Info

Product

Resources

About

Ion‐Enhanced Conversion of CO₂ into Formate on Porous Dendritic Bismuth Electrodes with High Efficiency and Durability

Ion‐Enhanced Conversion of CO₂ into Formate on Porous Dendritic Bismuth Electrodes with High Efficiency and Durability

Electrode Materials Engineering in Electrocatalytic CO₂ Reduction: Energy Input and Conversion Efficiency