An electroactive ion exchange hybrid film with collaboratively-driven ability for electrochemically-mediated selective extraction of chloride ions

Ji, Wangwang; Niu, Junjian; Zhang, Wei; Li, Xuan; Yan, Wenjun; Hao, Xiaogang; Wang, Zhongde

doi:10.1016/j.cej.2021.130807

Cited by 42 publications

(16 citation statements)

References 64 publications

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“…Although BiOX has a similar crystal structure (Figure S6), the lattice parameters are significantly different (Table S4). The I – -vacancy BiOI film removes I – in situ at a reduction potential (Figure S7) so that the memory effect could be produced ion memory effect can not only enhance the selectivity to target ions but also improve the ions selectivity (Table S3), ,, so it shows better selectivity to I – . In sum, the I – -vacancy BiOI film possesses outstanding selectivity to I – in the P-ESIX process.…”

Section: Results and Discussionmentioning

confidence: 99%

“…This unique crystal and electronic structure make BiOX (X = Cl, Br, I) have decent photocatalytic properties and it has been efficiently used in the photocatalytic degradation of organic pollutants . Moreover, in our previous research, BiOX has been used extensively in the application of ESIX. − ,, BiOI has shown remarkable potential in P-ESIX because of its suitable energy band gap (∼1.8 eV) and electrochemical stability. , BiOI is excitable by visible light and accelerates the separation of electron–hole pairs. Furthermore, I – was released/captured from the layered [(Bi 2 O 2 ) 2+ ] selectivity when a reduction/oxidation potential was applied to the film. , For the above reasons, BiOI could be used in the P-ESIX system to improve the adsorption capacity of I – .…”

Section: Introductionmentioning

confidence: 98%

“…21 Currently, this technology has been applied to the selective separation of many ions, such as Li + , 22 Cs + , 23 Pb 2+ , 24 Ni 2+ , 25 Y 3+ , 26 ClO 4 − , 27 F − , 28 Cl − , 17 and I − . 29 For example, Ji et al synthesized PPy/BiOCl EIXM to achieve the recovery of Cl − ; 31 Luo et al applied BiOI to extract I − . 32 It can be seen that BiOX has been widely used in the ESIX system.…”

Section: ■ Introductionmentioning

confidence: 99%

“…41 Moreover, in our previous research, BiOX has been used extensively in the application of ESIX. [30][31][32]37,42 BiOI has shown remarkable potential in P-ESIX because of its suitable energy band gap (∼1.8 eV) and electrochemical stability. 43,44 BiOI is excitable by visible light and accelerates the separation of electron−hole pairs.…”

Section: ■ Introductionmentioning

confidence: 99%

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BiOI with Inherent Photo/Electric Biactivity Recovery I^– by Novel Photoassisted Electrochemically Switched Ion Exchange Technology

Cheng

Wang

Luo

et al. 2022

Ind. Eng. Chem. Res.

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The recovery of iodide ion (I − ) from aqueous solutions is of great significance to economic development. Photoassisted electrochemically switched ion exchange (P-ESIX) takes advantage of the photo/electron bioactivity of EIXMs, which has been used for the recovery of bromide ion (Br − ) to increase the adsorption capacity of Br − . To further expand the application of P-ESIX, we used iodide-vacancy bismuth oxyiodide (I −vacancy BiOI) as the photoelectroactive ion exchange material (P-EIXM) for the recovery of I − . The results showed that an I − -vacancy BiOI film can effectively recover I − and improve the adsorption capacity because of its excellent selectivity and visible light adsorption ability. Compared with ESIX, the I − adsorption capacity increases by 1.38 times with a growth rate of 37.4% at 0.6 V (vs SCE). Also, the film electrode still retains 84.0% of the initial adsorption capacity after 10 cycles of use. The mechanism of P-ESIX system was further analyzed on the basis of the energy band structure theory. It is not only innovative and efficient technology for the recovery of I − but also shows that P-ESIX has potential as a new technology for a wide range of applications in the selective recovery of target ions.

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Section: Results and Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 98%

Section: ■ Introductionmentioning

confidence: 99%

Section: ■ Introductionmentioning

confidence: 99%

See 2 more Smart Citations

BiOI with Inherent Photo/Electric Biactivity Recovery I^– by Novel Photoassisted Electrochemically Switched Ion Exchange Technology

Cheng

Wang

Luo

et al. 2022

Ind. Eng. Chem. Res.

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“…The two binding energy peaks at 199.2 and 200.8 eV assignable to Cl 2p 3/2 and Cl 2p 1/2 can be deconvoluted from the high-resolution XPS Cl 2p spectra of both BiOCl and Bi 2 O 2 (CO 3 ) x Cl y (Fig. 2c), indicating the presence of the lattice Cl − [37]. Notably, a Bi/Cl atomic ratio of 61.5:1 is determined from the XPS Cl 2p spectrum of Bi 2 O 2 (CO 3 ) x Cl y (Fig.…”

Section: Synthesis and Characterization Of Bi 2 O 2 (Co 3 ) X Cl Ymentioning

confidence: 98%

Operando Converting BiOCl into Bi2O2(CO3)xCly for Efficient Electrocatalytic Reduction of Carbon Dioxide to Formate

Liu

Bedford

et al. 2022

Nano-Micro Lett.

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Bismuth-based materials (e.g., metallic, oxides and subcarbonate) are emerged as promising electrocatalysts for converting CO2 to formate. However, Bio-based electrocatalysts possess high overpotentials, while bismuth oxides and subcarbonate encounter stability issues. This work is designated to exemplify that the operando synthesis can be an effective means to enhance the stability of electrocatalysts under operando CO2RR conditions. A synthetic approach is developed to electrochemically convert BiOCl into Cl-containing subcarbonate (Bi2O2(CO3)xCly) under operando CO2RR conditions. The systematic operando spectroscopic studies depict that BiOCl is converted to Bi2O2(CO3)xCly via a cathodic potential-promoted anion-exchange process. The operando synthesized Bi2O2(CO3)xCly can tolerate − 1.0 V versus RHE, while for the wet-chemistry synthesized pure Bi2O2CO3, the formation of metallic Bio occurs at − 0.6 V versus RHE. At − 0.8 V versus RHE, Bi2O2(CO3)xCly can readily attain a FEHCOO- of 97.9%, much higher than that of the pure Bi2O2CO3 (81.3%). DFT calculations indicate that differing from the pure Bi2O2CO3-catalyzed CO2RR, where formate is formed via a *OCHO intermediate step that requires a high energy input energy of 2.69 eV to proceed, the formation of HCOO− over Bi2O2(CO3)xCly has proceeded via a *COOH intermediate step that only requires low energy input of 2.56 eV.

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CeNCl‐CeO₂ Heterojunction‐Modified Ni Catalysts for Efficient Electroreduction of CO₂ to CO

Liu,

Wang,

Chu

et al. 2023

Advanced Energy Materials

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Renewable‐electricity‐powered electrochemical CO2 reduction (CO2RR) is considered one of the most promising ways to convert exhaust CO2 into value‐added chemicals and fuels. Among various CO2RR products, CO is of great significance since it can be directly used as feedstock to produce chemical products through the Fischer–Tropsch process. However, the CO2‐to‐CO electrocatalytic process is often accompanied by a kinetically competing side reaction: H2 evolution reaction (HER). Designing electrocatalysts with tunable electronic structures is an attractive strategy to enhance CO selectivity. In this work, a CeNCl‐CeO2 heterojunction‐modified Ni catalyst is successfully synthesized with high CO2RR catalytic performance by the impregnation‐calcination method. Benefiting from the strong electron interaction between the CeNCl‐CeO2 heterojunction and Ni nanoparticles (NPs), the catalytic performance is greatly improved. Maximal CO Faradaic efficiency (FE) is up to 90% at −0.8 V (vs RHE), plus good stability close to 12 h. Detailed electrochemical tests and density functional theory (DFT) calculation results reveal that the introduction of the CeNCl‐CeO2 heterojunction tunes the electronic structure of Ni NPs. The positively charged Ni center leads to an enhanced local electronic structure, thus promoting the activation of CO2 and the adsorption of *COOH.

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An electroactive ion exchange hybrid film with collaboratively-driven ability for electrochemically-mediated selective extraction of chloride ions

Cited by 42 publications

References 64 publications

BiOI with Inherent Photo/Electric Biactivity Recovery I^– by Novel Photoassisted Electrochemically Switched Ion Exchange Technology

BiOI with Inherent Photo/Electric Biactivity Recovery I^– by Novel Photoassisted Electrochemically Switched Ion Exchange Technology

Operando Converting BiOCl into Bi2O2(CO3)xCly for Efficient Electrocatalytic Reduction of Carbon Dioxide to Formate

CeNCl‐CeO₂ Heterojunction‐Modified Ni Catalysts for Efficient Electroreduction of CO₂ to CO

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An electroactive ion exchange hybrid film with collaboratively-driven ability for electrochemically-mediated selective extraction of chloride ions

Cited by 42 publications

References 64 publications

BiOI with Inherent Photo/Electric Biactivity Recovery I– by Novel Photoassisted Electrochemically Switched Ion Exchange Technology

BiOI with Inherent Photo/Electric Biactivity Recovery I– by Novel Photoassisted Electrochemically Switched Ion Exchange Technology

Operando Converting BiOCl into Bi2O2(CO3)xCly for Efficient Electrocatalytic Reduction of Carbon Dioxide to Formate

CeNCl‐CeO2 Heterojunction‐Modified Ni Catalysts for Efficient Electroreduction of CO2 to CO

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Product

Resources

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BiOI with Inherent Photo/Electric Biactivity Recovery I^– by Novel Photoassisted Electrochemically Switched Ion Exchange Technology

BiOI with Inherent Photo/Electric Biactivity Recovery I^– by Novel Photoassisted Electrochemically Switched Ion Exchange Technology

CeNCl‐CeO₂ Heterojunction‐Modified Ni Catalysts for Efficient Electroreduction of CO₂ to CO