Embedding oxygen vacancies at SnO<sub>2</sub>–CNT surfaces <i>via</i> a microwave polyol strategy towards effective electrocatalytic reduction of carbon-dioxide to formate

Pavithra, K. S.; Kumar, Sakkarapalayam Murugesan Senthil

doi:10.1039/c9cy01960j

Cited by 26 publications

(17 citation statements)

References 62 publications

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“…Thus, modification of the oxygen vacancies with nonmetal atoms is a promising avenue to optimize catalytic performance by tuning the local electronic structure. Oxygen vacancies were also investigated to promote other energy‐related reactions, such as NRR, [ 31 ] CO 2 RR, [ 32 ] and others. [ 33 ]…”

Section: Classification Of Vacanciesmentioning

confidence: 99%

Recent Progress of Vacancy Engineering for Electrochemical Energy Conversion Related Applications

Zhao

Jin

et al. 2020

Adv Funct Materials

207

129

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Efficient electrocatalysts are key requirements for the development of ecofriendly electrochemical energy‐related technologies and devices. It is widely recognized that the introduction of vacancies is becoming an important and valid strategy to promote the electrocatalytic performances of the designed nanomaterials. In this review, the significance of vacancies (i.e., cationic vacancies, anionic vacancies, and mixed vacancies) on the improvement of electrocatalytic performances via three main functionalities, including tuning the electronic structure, regulating the active sites, and improving electrical conductivity, is systematically discussed. Recent achievements in vacancy engineering on various hotspot electrocatalytic processes are comprehensively summarized, with focus on the oxygen reduction reaction (ORR), oxygen evolution reaction (OER), hydrogen evolution reaction (HER), nitrogen reduction reaction (NRR), CO2 reduction reaction (CO2RR), and their further applications in overall water‐splitting and zinc–air battery devices. The recent development of vacancy engineering for other energy‐related applications is also summarized. Finally, the challenges and prospects of vacancy engineering to regulate the electrocatalytic performances of different electrochemical reactions are discussed.

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Section: Classification Of Vacanciesmentioning

confidence: 99%

Recent Progress of Vacancy Engineering for Electrochemical Energy Conversion Related Applications

Zhao

Jin

et al. 2020

Adv Funct Materials

207

129

View full text Add to dashboard Cite

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“…In Figure 4b, the interfacial charge transfer resistance ( R ct ) of the SnO 2 /CuO NCs, the SnO 2 −CuO physical mixture, the SnO 2 and the CuO is 26.3, 30.1, 36.9 and 4.3 Ω, respectively. Such results reveal the SnO 2 /CuO NCs have faster dynamics than the SnO 2 −CuO physical mixture and SnO 2 , except for CuO that has facilitate HER rather than CO 2 RR [35] . Of note, the first electron transfer step (the adsorbed CO 2 +e − →CO 2 .− ) is the rate‐limiting step, in which stabilization of the CO 2 .− intermediate plays a significant role in CO 2 RR to formate.…”

Section: Resultsmentioning

confidence: 91%

“…Such results reveal the SnO 2 /CuO NCs have faster dynamics than the SnO 2 À CuO physical mixture and SnO 2 , except for CuO that has facilitate HER rather than CO 2 RR. [35] Of note, the first electron transfer step (the adsorbed CO 2 + e À !CO 2 * À ) is the rate-limiting step, in which stabilization of the CO 2 * À intermediate plays a significant role in CO 2 RR to formate. To verify the binding affinity of CO 2 * À on samples, adsorption of OH À as a surrogate was carried out by oxidative LSV scans at 100 mV s À 1 in Arbubbled 0.1 M NaOH electrolyte.…”

Section: Resultsmentioning

confidence: 99%

Derived CuSn Alloys from Heterointerfaces in Bimetallic Oxides Promote the CO₂ Electroreduction to Formate

et al. 2021

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Electroreduction of CO 2 into valuable chemicals provides a promising strategy for mitigating excessive CO 2 emissions and storing intermittent renewable energy. Herein, SnO 2 /CuOnanoparticle composites (NCs) with rich heterointerfaces were designed for selectively converting CO 2 into liquidus formate. Distinct from only monometallic phase evolved in physicallymixed samples, Cu and Sn atoms at the heterointerfaces were in-situ reduced into alloys under working conditions. With residual SnO x /CuO x stabilizing the CO 2 * À intermediate, CuSn alloys can obviously suppress the undesired hydrogen evolution reaction and then enhance the catalytic selectivity. In a H-type cell, as-obtained SnO 2 /CuO NCs exhibit Faraday efficiency (FE) of 89.3 % and current density of 18.34 mA cm À 2 for formate, which is stable for 30 h at À 1.0 V vs. RHE. Impressively, the formate current density of 310 mA cm À 2 is achieved in a flow cell. Moreover, constructing efficient samples by the heterointerfaces engineering would provide an inspiration for designing novel electrocatalysts.

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“…The results verified that high production of formic acid can be achieved at high current density and high CO 2 pressure. Pavithra et al [164] . reported a Sn‐based catalyst synthesized by microwave polyol method.…”

Section: Types Of Catalysts Used For Formate/formic Acid Productionmentioning

confidence: 99%

Electroreduction of Carbon Dioxide into Formate: A Comprehensive Review

et al. 2021

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Carbon dioxide conversion into useful products has been gaining considerable attention as a global‐warming‐mitigation technique. The electrochemical conversion of CO2 into high‐value chemicals involves the utilization of electrical energy in the presence of an effective catalyst. The process products depend on the number of transferred electrons during the reaction and the characteristics of the electrode. Recently, electrodes coupled with active catalysts have been used to convert CO2 into valuable products including formic acid, hydrocarbons, and syngas. This review offers an overview of the recent literature on the electrochemical conversion of CO2 to valuable products, with an emphasis on the production of formate/formic acid. In addition, it compares the main features of electrochemical conversion to other techniques and summarizes their key advantages. It also provides future perspective for research and development, such as the need for novel and selective catalysts to obtain high conversion and product yield with low energy consumption.

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Embedding oxygen vacancies at SnO₂–CNT surfaces via a microwave polyol strategy towards effective electrocatalytic reduction of carbon-dioxide to formate

Abstract: A facile and scalable microwave-polyol method has been utilised to introduce vacancies onto SnO2–CNT surfaces which significantly brings down the overpotential to around 150 mV during the electrochemical reduction of CO2.

Cited by 26 publications

References 62 publications

Recent Progress of Vacancy Engineering for Electrochemical Energy Conversion Related Applications

Recent Progress of Vacancy Engineering for Electrochemical Energy Conversion Related Applications

Derived CuSn Alloys from Heterointerfaces in Bimetallic Oxides Promote the CO₂ Electroreduction to Formate

Electroreduction of Carbon Dioxide into Formate: A Comprehensive Review

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Embedding oxygen vacancies at SnO2–CNT surfaces via a microwave polyol strategy towards effective electrocatalytic reduction of carbon-dioxide to formate

Abstract: A facile and scalable microwave-polyol method has been utilised to introduce vacancies onto SnO2–CNT surfaces which significantly brings down the overpotential to around 150 mV during the electrochemical reduction of CO2.

Cited by 26 publications

References 62 publications

Recent Progress of Vacancy Engineering for Electrochemical Energy Conversion Related Applications

Recent Progress of Vacancy Engineering for Electrochemical Energy Conversion Related Applications

Derived CuSn Alloys from Heterointerfaces in Bimetallic Oxides Promote the CO2 Electroreduction to Formate

Electroreduction of Carbon Dioxide into Formate: A Comprehensive Review

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Product

Resources

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Embedding oxygen vacancies at SnO₂–CNT surfaces via a microwave polyol strategy towards effective electrocatalytic reduction of carbon-dioxide to formate

Derived CuSn Alloys from Heterointerfaces in Bimetallic Oxides Promote the CO₂ Electroreduction to Formate