Catalyst design strategies for stable electrochemical CO<sub>2</sub> reduction reaction

Choi, Woong; Won, Da Hye; Hwang, Yun Jeong

doi:10.1039/d0ta02633f

Cited by 69 publications

(45 citation statements)

References 127 publications

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“…Some studies even found that metal contaminants can be present due to the dissolution of the oxygen-evolution catalyst at the anode used as the counter electrode for the CO2RR and its subsequent re-deposition at the cathode, where it interferes with the CO2RR activity [63,64]. As stated by Won et al, the deposition of metal impurities is also problematic in the electrocatalytic CO2RR due to the complex steps and the susceptibility of the metal to deposition in the reductive potential environment [64,65].…”

Section: Catalyst Poisoningmentioning

confidence: 99%

“…This strategy is known to provide energetically preferred sites for the adsorption of the desired CO2 reduction intermediate. However, in a reductive environment during electrocatalytic CO2 reduction, nanosized particles seldom succeed in retaining their structure due to the highenergy of the surface compared to the bulk material [64,68]. Although some studies have mentioned the importance of surface reconstructing for providing a fresh available catalyst surface and enhancing its electrochemical characteristics [69], more studies have attributed the observed degradation of catalyst activity and selectivity to transformations of the existing surface that alter the structure of the active sites.…”

Section: Catalyst Restructuringmentioning

confidence: 99%

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Towards the Large-Scale Electrochemical Reduction of Carbon Dioxide

Park

Wijaya

et al. 2021

Catalysts

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The severe increase in the CO2 concentration is a causative factor of global warming, which accelerates the destruction of ecosystems. The massive utilization of CO2 for value-added chemical production is a key to commercialization to guarantee both economic feasibility and negative carbon emission. Although the electrochemical reduction of CO2 is one of the most promising technologies, there are remaining challenges for large-scale production. Herein, an overview of these limitations is provided in terms of devices, processes, and catalysts. Further, the economic feasibility of the technology is described in terms of individual processes such as reactions and separation. Additionally, for the practical implementation of the electrochemical CO2 conversion technology, stable electrocatalytic performances need to be addressed in terms of current density, Faradaic efficiency, and overpotential. Hence, the present review also covers the known degradation behaviors and mechanisms of electrocatalysts and electrodes during electrolysis. Furthermore, strategic approaches for overcoming the stability issues are introduced based on recent reports from various research areas involved in the electrocatalytic conversion.

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Section: Catalyst Poisoningmentioning

confidence: 99%

Section: Catalyst Restructuringmentioning

confidence: 99%

Towards the Large-Scale Electrochemical Reduction of Carbon Dioxide

Park

Wijaya

et al. 2021

Catalysts

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“…In recent years, several studies were done on various electrocatalysts, but yet, there are problems in Faradaic Efficiency (FE), Current Density (CD), Energy Efficiency, electrocatalyst deactivate, the internal resistance of electrocatalysts, and the potential for scalability to the large sizes without the loss of efficiency, because CO 2 is a thermodynamically stable molecule, it is fully oxidized [3][4][5][6][7][8][9][10][11][12]. A suitable electrocatalyst to reduce CO 2 is necessary to reach a low-cost process with acceptable selectivity and efficiency.…”

Section: Introductionmentioning

confidence: 99%

Investigation of Zn/Ni-Based Electrocatalysts for Electrochemical Conversion of CO₂to SYNGAS

Beheshti¹,

Kakooei²,

Ismail³

et al. 2022

Electrocatalysis and Electrocatalysts for a Cleaner Environment - Fundamentals and Applications

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In the last decade, there is some research on the conversion of CO2 to energy form. CO2 can be converted to value-added chemicals including HCOOH, CO, CH4, C2H4, and liquid hydrocarbons that can be used in various industries. Among the methods, electrochemical methods are of concern regarding their capability to operate with an acceptable reaction rate and great efficiency at room temperature and can be easily coupled with renewable energy sources. Besides, electrochemical cell devices have been manufactured in a variety of sizes, from portable to large-scale applications. Catalysts that optionally reduce CO2 at low potential are required. Therefore, choosing a suitable electrocatalyst is very important. This chapter focused on the electrochemical reduction of CO2 by Zn-Ni bimetallic electrocatalyst. The Zn-Ni coatings were deposited on the low-carbon steel substrate. Electrochemical deposition parameters such as temperature in terms of LPR corrosion rate, microstructure, microcracks, and its composition have been investigated. Then, the electrocatalyst stability and activity, as well as gas intensity and selectivity, were inspected by SEM/EDX analysis, GC, and electrochemical tests. Among the electrocatalysts for CO2 reduction reaction, the Zn65%-Ni35% electrode with cluster-like microstructure had the best performance for CO2 reduction reaction according to minimum coke formation (<10%) and optimum CO and H2 faradaic efficiencies (CO FE% = 55% and H2 FE% = 45%).

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“…The electrochemical reduction of carbon dioxide (CO 2 R) driven by renewable energies to produce valuable commodity chemicals or fuels is commonly regarded as a highly promising strategy to establish a sustainable economy based on a closed carbon cycle. However, an effective development to an industrial scale with reasonable economic viability [1] is still impaired by major challenges including electrolyzer engineering [2] , electrode design [3,4] as well as the search for effective and durable catalyst systems [5] . For the latter, especially noble metal free formulations based on inexpensive and readily available elements are particularly desirable [6]…”

Section: Introductionmentioning

confidence: 99%

“…[11][12][13] We recently demonstrated that a sequential exchange of sulfur in Fe 4. 5 Ni 4.5 S 8 with selenium favors the formation of CO over H 2 under otherwise identical conditions [9] . Due to the involvement of the reactive metal sites in the electrocatalytic conversion of CO 2 [7,14] , we expected similar effects upon variation of the metal content.…”

Section: Introductionmentioning

confidence: 99%

Influence of the Fe : Ni Ratio in Fe_xNi_9‐xS₈ (x=3–6) on the CO₂ Electroreduction

et al. 2021

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The electrochemical CO2 reduction (CO2R) is a promising approach to decrease the amount of CO2 in the atmosphere by producing commodity chemicals or fuels using renewable energies. Herein, the development of non‐noble metal electrocatalysts is regarded as a key point for achieving the transition of CO2R to industrial scales. Transition metal chalcogenides of the pentlandite structure (M9X8) have emerged as promising electrocatalysts to produce syngas. In this line, we present the electrochemical CO2R of FexNi9‐xS8 (x=3–6) with variable Fe : Ni ratios. All materials can reduce H2O/CO2 mixtures to CO or H2 respectively with varying efficiency depending on the Fe : Ni ratio and the water content. While CO2R in proton‐rich organic electrolytes was mainly accompanied by hydrogen evolution, the CO2R activity climaxed with F.E. of 3.6 % for CO and 0.3 % for methane using Fe3Ni6S8. Using electrolytes with low water content, CO production with F.E. close to 90 % was demonstrated. Counterintuitively, the variation of the Fe : Ni ratio led only to small alterations in the CO2R activity. Quantum mechanical studies were performed to get further information on the observed trends and provide further insight into structure/activity relationships for the Fe/Ni pentlandite system and its CO2R activity opening the path towards the development of more active and robust CO2R electrocatalysts.

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Catalyst design strategies for stable electrochemical CO₂ reduction reaction

Abstract: For practical applications, the deactivation processes of electrocatalysts in electrochemical CO2 reduction reactions have to be addressed by studying recent advances such as exclusion of metal impurity effect, periodic electrochemical activation and active nanocatalyst design.

Cited by 69 publications

References 127 publications

Towards the Large-Scale Electrochemical Reduction of Carbon Dioxide

Towards the Large-Scale Electrochemical Reduction of Carbon Dioxide

Investigation of Zn/Ni-Based Electrocatalysts for Electrochemical Conversion of CO₂to SYNGAS

Influence of the Fe : Ni Ratio in Fe_xNi_9‐xS₈ (x=3–6) on the CO₂ Electroreduction

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Catalyst design strategies for stable electrochemical CO2 reduction reaction

Abstract: For practical applications, the deactivation processes of electrocatalysts in electrochemical CO2 reduction reactions have to be addressed by studying recent advances such as exclusion of metal impurity effect, periodic electrochemical activation and active nanocatalyst design.

Cited by 69 publications

References 127 publications

Towards the Large-Scale Electrochemical Reduction of Carbon Dioxide

Towards the Large-Scale Electrochemical Reduction of Carbon Dioxide

Investigation of Zn/Ni-Based Electrocatalysts for Electrochemical Conversion of CO2to SYNGAS

Influence of the Fe : Ni Ratio in FexNi9‐xS8 (x=3–6) on the CO2 Electroreduction

Contact Info

Product

Resources

About

Catalyst design strategies for stable electrochemical CO₂ reduction reaction

Investigation of Zn/Ni-Based Electrocatalysts for Electrochemical Conversion of CO₂to SYNGAS

Influence of the Fe : Ni Ratio in Fe_xNi_9‐xS₈ (x=3–6) on the CO₂ Electroreduction