Zn nanosheets coated with a ZnS subnanometer layer for effective and durable CO<sub>2</sub>reduction

Li, Chenglong; Shen, Gurong; Zhang, Rui; Wu, Deyan; Zou, Chengqin; Ling, Tao; Liu, Hui; Dong, Cunku; Du, Xi‐Wen

doi:10.1039/c8ta10799h

Cited by 68 publications

(58 citation statements)

References 46 publications

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“…Meanwhile, P‐Zn exhibits the smallest arc among the four samples in electrochemical impedance spectra (Supporting Information, Figure S12), implying the lowest interface resistance for charge transfer, which is also very crucial for CO 2 electroreduction. Overall, P‐Zn shows excellent CO 2 electroreduction properties and superior to the most other reported Zn catalysts in terms of FEs and j CO (Figure e; Supporting Information, Figure S13 and Table S1) . Furthermore, the FE and current density of P‐Zn hardly change during 18 h testing at −0.95 V vs. RHE (Figure f; Supporting Information, Figure S14), indicating a good durability.…”

Section: Resultsmentioning

confidence: 88%

Electroreduction of Carbon Dioxide in Metallic Nanopores through a Pincer Mechanism

et al. 2020

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Metallic catalysts with nanopores are advantageous on improving both activity and selectivity,w hile the reason behind that remains unclear all along. In this work, porous Zn nanoparticles (P-Zn) were adopted as am odel catalyst to investigate the catalytic behavior of metallic nanopores.Insitu X-ray absorption spectroscopy, in situ Fourier transform infrared spectroscopy, and density functional theory (DFT) analyses reveal that the concave surface of nanopores works like ap incer to capture and clamp CO 2 and H 2 Op recursors simultaneously,t hus lowering the energy barriers of CO 2 electroreduction. Resultantly,t he pincer mechanism endows P-Zn with ah igh Faradic efficiency (98.1 %) towards CO production at the potential of À0.95 Vv s. RHE. Moreover, DFT calculation demonstrates that Co and Cu nanopores exhibit the pincer behavior as well, suggesting that this mechanism is universal for metallic nanopores.

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Section: Resultsmentioning

confidence: 88%

Electroreduction of Carbon Dioxide in Metallic Nanopores through a Pincer Mechanism

et al. 2020

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“…From the polarisation curves of the CO partial current density versus potential, the Tafel plot of Zn‐based catalysts was obtained and analysed to investigate the kinetic mechanism responsible for the enhanced electrochemical CO 2 RR performance (Table S1). The Tafel slope can indicate the RDS of the electrochemical reaction 24,31,57,58 . A Tafel slope of 233 mV dec −1 was obtained for the Zn‐1.7/16 hours catalyst, which implies that the adsorption of the CO 2 • – intermediate on the metal surface by a single‐electron process is sluggish, and therefore, this step determines the overall reaction rate 24,57,58 .…”

Section: Resultsmentioning

confidence: 99%

“…The Tafel slope can indicate the RDS of the electrochemical reaction 24,31,57,58 . A Tafel slope of 233 mV dec −1 was obtained for the Zn‐1.7/16 hours catalyst, which implies that the adsorption of the CO 2 • – intermediate on the metal surface by a single‐electron process is sluggish, and therefore, this step determines the overall reaction rate 24,57,58 . After the thermal treatment, the Tafel slopes of Zn‐1.7/16 hours/H 2 and Zn‐1.7/16 hours/Air catalysts decreased to 151 and 134 mV dec −1 , respectively, indicating that the kinetics of the RDS was enhanced.…”

Section: Resultsmentioning

confidence: 99%

Solution‐phase‐reconstructed Zn‐based nanowire electrocatalysts for electrochemical reduction of carbon dioxide to carbon monoxide

Kim

Han

et al. 2020

Int J Energy Res

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Summary The production of CO via electrochemical CO2 reduction has been recognised as a promising technology that overcomes the environmental issues caused by global warming. It also facilitates the conversion of CO2 into energy sources. Earth‐abundant Zn is a well‐known alternative to noble metal catalysts such as Au and Ag for the electrochemical CO2 reduction to CO. In particular, Zn‐based materials in the form of nanowires are potentially applicable as electrocatalysts in the electrochemical CO2 reduction. However, the conventional methods for manufacturing the nanowire structure are difficult as they require harsh conditions such as high temperatures and excess energy. In this study, Zn‐based nanowire catalysts are prepared by the facile electrodeposition of Zn nanostructures on a substrate followed by their energy‐free solution‐phase reconstitution. Further, their electrochemical performance in the CO2 reduction is investigated in a CO2‐purged 0.5 M KHCO3 electrolyte. By optimising the deposition conditions, hexagonal Zn (h‐Zn) plates with dominant Zn(101) facets, the favoured crystal structure for CO2 reduction, are fabricated on carbon paper. Furthermore, it is found that, during the solution‐phase reconstruction over 16 hours, the h‐Zn plate transforms to a nanowire owing to the differences between the oxidation rates of different crystal facets and the formation of a hydroxide complex. The activity of the reconstructed Zn‐based nanowire catalyst is enhanced further by forming an oxide layer via thermal treatment in a H2 atmosphere. This treatment boosted the reaction kinetics, thereby enhancing the catalyst performance in the CO2 reduction.

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“…Meanwhile, recent dramatic progress of nanostructured Zn catalysts, even in the popular bicarbonate electrolyte, has been made based on an introduction of various secondary phases to Zn catalysts . The Zn 94 Cu 6 foam catalyst generated by introducing Cu achieved a CO FE of 90% at –0.95 V RHE .…”

Section: Non‐noble Metal–based Catalystsmentioning

confidence: 99%

Progress in development of electrocatalyst for CO₂ conversion to selective CO production

et al. 2019

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The conversion of carbon dioxide (CO2) to valuable fuels and chemicals offers a new pathway for sustainable and clean carbon fixation. Recently, the focus has been on electrochemical CO2 reduction on heterogeneous electrode catalysts, leading to remarkable achievements in the reaction performance. To date, CO2 to carbon monoxide (CO) conversion is considered as the most promising candidate reaction for the industrial market, owing to its high efficiency and reasonable technoeconomic feasibility. Moreover, CO has been proposed as a key intermediate species for further reduced hydrocarbons, which can pave the way for various fuel production. This study sets out to describe recent progress on the electrochemical CO2 reduction to CO in a heterogeneously catalyzed system. The review includes understanding of the catalytic material employed and engineering strategies implemented by adjusting the binding energy of key adsorbates. These material design approaches, such as nanostructuring, alloying, doping, and so forth, have pioneered breakouts in the intrinsic catalytic nature of transition metal elements. Moreover, recent advances in systematic design are summarized, with focus on practical industrial applications. Finally, perspectives on the design of electrocatalyst materials for CO production by electrochemical CO2 reduction are presented.

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Zn nanosheets coated with a ZnS subnanometer layer for effective and durable CO₂reduction

Abstract: Electrochemical reduction of CO2 into value-added chemicals provides a facile solution to energy and environmental crisis.

Cited by 68 publications

References 46 publications

Electroreduction of Carbon Dioxide in Metallic Nanopores through a Pincer Mechanism

Electroreduction of Carbon Dioxide in Metallic Nanopores through a Pincer Mechanism

Solution‐phase‐reconstructed Zn‐based nanowire electrocatalysts for electrochemical reduction of carbon dioxide to carbon monoxide

Progress in development of electrocatalyst for CO₂ conversion to selective CO production

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Zn nanosheets coated with a ZnS subnanometer layer for effective and durable CO2reduction

Abstract: Electrochemical reduction of CO2 into value-added chemicals provides a facile solution to energy and environmental crisis.

Cited by 68 publications

References 46 publications

Electroreduction of Carbon Dioxide in Metallic Nanopores through a Pincer Mechanism

Electroreduction of Carbon Dioxide in Metallic Nanopores through a Pincer Mechanism

Solution‐phase‐reconstructed Zn‐based nanowire electrocatalysts for electrochemical reduction of carbon dioxide to carbon monoxide

Progress in development of electrocatalyst for CO2 conversion to selective CO production

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Zn nanosheets coated with a ZnS subnanometer layer for effective and durable CO₂reduction

Progress in development of electrocatalyst for CO₂ conversion to selective CO production