Hierarchical heterostructure of SnO<sub>2</sub> confined on CuS nanosheets for efficient electrocatalytic CO<sub>2</sub> reduction

Wang, Xiang; Lv, Jing; Zhang, Jiaxu; Xue, Chaozhuang; Bian, Guo‐Qing; Li, Dongsheng; Wang, Ying

doi:10.1039/c9nr08726e

Cited by 46 publications

(28 citation statements)

References 80 publications

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“…To further evaluate the role of chemical states in R‐Cu 2 SnS 3 , X‐ray photoelectron spectroscopy (XPS) was performed. The negatively shift XPS peaks of Cu 2p and the constant XPS peaks of Sn 3d suggested that the formation of the heterojunction nanosheets can efficiently enhanced the negative potential tolerance of Sn 4+ through the electron self‐flow between Cu + and Sn 4+ during the CO 2 RR process (Figure 4 f and g) [8] . These results also demonstrated that the Sn 4+ held the same valence state during the CO 2 RR process for it benefited from the protection of Cu + with more positive redox potential than Sn 4+ and the strong electron interaction between the CuS, Cu 2 O and SnO 2 (Figure S14) [18] .…”

Section: Resultsmentioning

confidence: 99%

In Situ Phase Separation into Coupled Interfaces for Promoting CO₂ Electroreduction to Formate over a Wide Potential Window

Wang

Yang

et al. 2021

Angewandte Chemie

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Bimetallic sulfides are expected to realize efficient CO2 electroreduction into formate over a wide potential window, however, they will undergo in situ structural evolution under the reaction conditions. Therefore, clarifying the structural evolution process, the real active site and the catalytic mechanism is significant. Here, taking Cu2SnS3 as an example, we unveiled that Cu2SnS3 occurred self‐adapted phase separation toward forming the stable SnO2@CuS and SnO2@Cu2O heterojunction during the electrochemical process. Calculations illustrated that the strongly coupled interfaces as real active sites driven the electron self‐flow from Sn4+ to Cu+, thereby promoting the delocalized Sn sites to combine HCOO* with H*. Cu2SnS3 nanosheets achieve over 83.4 % formate selectivity in a wide potential range from −0.6 V to −1.1 V. Our findings provide insight into the structural evolution process and performance‐enhanced origin of ternary sulfides under the CO2 electroreduction.

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Section: Resultsmentioning

confidence: 99%

In Situ Phase Separation into Coupled Interfaces for Promoting CO₂ Electroreduction to Formate over a Wide Potential Window

Wang

Yang

et al. 2021

Angewandte Chemie

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“…Interestingly, the improvement in catalytic activity by increasing dispersion of active sites owing to confinement effect has also been extended to electrocatalytic reduction of CO 2 . [45,46] Especially, Tuo e al reported a new strategy to synthesize metal porphyrin-hybridized porous and ultra-thin carbon nanosheets (MPPCN) by the confinement function of the layered template. In the preparation process, the layered confinement reaction protects the coordination structure of metal and nitrogen atoms during subsequent hightemperature treatment while ensuring the formation of ultrathin structures.…”

Section: Increasing Metal Dispersionmentioning

confidence: 99%

Catalytic Conversion of Carbon Oxides in Confined Spaces: Status and Prospects

Zhao

2020

ChemCatChem

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Owing to the depletion of fossil reserves and the global warming by released greenhouse gas from the consumption of fossil resources, the catalytic conversion of carbon oxide (COx, including CO2 and CO) into fuels and high‐value chemicals has attracted tremendous interest in the field of catalysis. Developing high‐performance and practical catalysts with high activity, selectivity, and stability is of great importance but remains a huge challenge. A variety of new strategies were developed to take advantage of confinement effect to address the challenges that are relevant to the highly‐efficient transformation and utilization of COx by performing catalytic reactions in a confined space. The status on this issue can be divided into three aspects: improvement in catalytic activity, increase in catalytic selectivity and enhancement in catalytic stability. In this review, the progress in the field of promoted catalytic conversion of COx in confined spaces will be presented and discussed. Especially, the specific promoting mechanism in terms of the confinement effect for COx‐related transformations in confined spaces and the relationship between the impact of the confined space on the catalytic activity, selectivity, and stability regarding of COx conversions are highlighted. Finally, the future prospects on the opportunities and challenges of catalytic conversion of COx in confined spaces are outlined.

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“…Such Sn sites with high charge density can attract CO 2 molecules, lower the activation energy of CO 2 RR, and boost the conversion of intermediates. Moreover, the interfacial electron transfer is promoted by the strong electronic interactions between Sn species and the CN substrate [24] . On the other hand, the SnO x layer can suppress HER to a certain extent, but a metal oxide layer with excessive thickness would also decrease the conduction and enhance the evolution of H 2 [14] .…”

Section: Resultsmentioning

confidence: 99%

Highly Efficient and Selective CO₂Electro‐Reduction to HCOOH on Sn Particle‐Decorated Polymeric Carbon Nitride

et al. 2020

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Electrochemical conversion of CO 2 into liquid fuels by efficient and earth-abundant catalysts is of broad interest but remains a great challenge in renewable energy production and environmental remediation. Herein, a Sn particle-decorated polymeric carbon nitride (CN) electrocatalyst was successfully developed for efficient, durable, and highly selective CO 2 reduction to formic acid. High-resolution X-ray photoelectron spectroscopy confirmed that the metallic Sn particles and CN matrix are bound by strong chemical interaction, rendering the composite catalyst a stable structure. More notably, the electronic structure of Sn was well tuned to be highly electron-rich due to the electron transfer from N atoms of CN to Sn atoms via metalsupport interactions, which favored the adsorption and activation of CO 2 molecules, promoted charge transport, and thus enhanced the electrochemical conversion of CO 2. The composite electrocatalyst demonstrated an excellent Faradaic efficiency of formic acid (FE HCOOH) up to 96 � 2 % at the potential of À 0.9 V vs. reversible hydrogen electrode, which remained at above 92 % during the electrochemical reaction of 10 h, indicating that the present Sn particle-decorated polymeric carbon nitride electrocatalyst is among the best in comparison with reported Sn-based electrocatalysts.

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Hierarchical heterostructure of SnO₂ confined on CuS nanosheets for efficient electrocatalytic CO₂ reduction

Abstract: Hierarchical heterostructure of SnO2 confined on ultrathin CuS nanosheets for efficient electrocatalytic CO2 reduction.

Cited by 46 publications

References 80 publications

In Situ Phase Separation into Coupled Interfaces for Promoting CO₂ Electroreduction to Formate over a Wide Potential Window

In Situ Phase Separation into Coupled Interfaces for Promoting CO₂ Electroreduction to Formate over a Wide Potential Window

Catalytic Conversion of Carbon Oxides in Confined Spaces: Status and Prospects

Highly Efficient and Selective CO₂Electro‐Reduction to HCOOH on Sn Particle‐Decorated Polymeric Carbon Nitride

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Hierarchical heterostructure of SnO2 confined on CuS nanosheets for efficient electrocatalytic CO2 reduction

Abstract: Hierarchical heterostructure of SnO2 confined on ultrathin CuS nanosheets for efficient electrocatalytic CO2 reduction.

Cited by 46 publications

References 80 publications

In Situ Phase Separation into Coupled Interfaces for Promoting CO2 Electroreduction to Formate over a Wide Potential Window

In Situ Phase Separation into Coupled Interfaces for Promoting CO2 Electroreduction to Formate over a Wide Potential Window

Catalytic Conversion of Carbon Oxides in Confined Spaces: Status and Prospects

Highly Efficient and Selective CO2Electro‐Reduction to HCOOH on Sn Particle‐Decorated Polymeric Carbon Nitride

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Product

Resources

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Hierarchical heterostructure of SnO₂ confined on CuS nanosheets for efficient electrocatalytic CO₂ reduction

In Situ Phase Separation into Coupled Interfaces for Promoting CO₂ Electroreduction to Formate over a Wide Potential Window

In Situ Phase Separation into Coupled Interfaces for Promoting CO₂ Electroreduction to Formate over a Wide Potential Window

Highly Efficient and Selective CO₂Electro‐Reduction to HCOOH on Sn Particle‐Decorated Polymeric Carbon Nitride