RETRACTED ARTICLE: An overview of CO<sub>2</sub> electroreduction into hydrocarbons and liquid fuels on nanostructured copper catalysts

Abbas, Ali; Ullah, Mudaser; Ali, Qasim; Imran, Zahid; Abbas, Saleem; Wang, Xianli

doi:10.1080/17518253.2016.1188162

Cited by 7 publications

(3 citation statements)

References 75 publications

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“…Qualitatively, decreased proton availability at the electrode surface favors C−C coupling over intermediate protonation, and C 2 H 4 formation is enhanced relative to CH 4 formation at higher pH values. Current research efforts are devoted to improving the CO 2 conversion rates and product selectivity by controlling the size, structure, and oxidation state of the copper nanostructures …”

Section: Experimental Studiesmentioning

confidence: 99%

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Electrochemical Carbon Dioxide Reduction at Nanostructured Gold, Copper, and Alloy Materials

2017

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Mitigating carbon dioxide (CO2) emissions is one of today's most important scientific challenges. Electrochemical conversion of CO2 into industrially relevant chemicals is a leading strategy because it would allow sustainable production of commodity chemicals. In this review, we outline the current progress in nanostructuring gold, copper, and alloy catalysts for the electrochemical CO2 reduction reaction. In general, Au catalysts show structure and voltage dependent CO selectivity alongside the H2 evolution reaction. The ability to tune CO to H2 product distributions is appealing for downstream processing into a variety of industrially relevant chemicals. Cu catalysts produce a wider range of products, and current efforts focus on controlling the product distribution by tuning the catalyst size, structure, oxidation state, and crystallographic orientation. Finally, we discuss the emerging field of computational electrocatalysis with emphasis on the computational hydrogen electrode method. The combination of experiment and computation is important because it provides fundamental insight into chemical processes driving catalytic CO2 conversion. Continued work will help to tune catalyst structure and create next‐generation materials with high catalytic activity and desirable product selectivity.

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Section: Experimental Studiesmentioning

confidence: 99%

“…Current research involves controlling the size, shape, structure, and crystallographic orientation of nanostructured catalysts to tune the CO 2 RR activity, product distributions, and FEs . However, fundamental understanding of catalyst performance and structure–property relationships are still needed.…”

Section: Introductionmentioning

confidence: 99%

Electrochemical Carbon Dioxide Reduction at Nanostructured Gold, Copper, and Alloy Materials

2017

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“…Studying surface chemistry is of great significance for enhancing the overall efficiency of many electrochemical applications [78][79][80]. In catalysis, for example, understanding the adsorption mechanism of species on catalytic surfaces-mainly electrodes-is essential in order to formulate a design principle for the prefect catalyst that can reach the optimum efficiency for a desired electrochemical process [81][82][83].…”

Section: Solving the Co Adsorption Puzzle With The U Correctionmentioning

confidence: 99%

The DFT+U: Approaches, Accuracy, and Applications

Tolba¹,

Gameel²,

Ali³

et al. 2018

Density Functional Calculations - Recent Progresses of Theory and Application

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This chapter introduces the Hubbard model and its applicability as a corrective tool for accurate modeling of the electronic properties of various classes of systems. The attainment of a correct description of electronic structure is critical for predicting further electronic-related properties, including intermolecular interactions and formation energies. The chapter begins with an introduction to the formulation of density functional theory (DFT) functionals, while addressing the origin of bandgap problem with correlated materials. Then, the corrective approaches proposed to solve the DFT bandgap problem are reviewed, while comparing them in terms of accuracy and computational cost. The Hubbard model will then offer a simple approach to correctly describe the behavior of highly correlated materials, known as the Mott insulators. Based on Hubbard model, DFT+U scheme is built, which is computationally convenient for accurate calculations of electronic structures. Later in this chapter, the computational and semiempirical methods of optimizing the value of the Coulomb interaction potential (U) are discussed, while evaluating the conditions under which it can be most predictive. The chapter focuses on highlighting the use of U to correct the description of the physical properties, by reviewing the results of case studies presented in literature for various classes of materials.

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Size‐Dependent Activity of Palladium Nanoparticles: Efficient Conversion of CO₂ into Formate at Low Overpotentials

2017

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Remarkable size-dependent activity of palladium nanoparticles (PdNPs) towards formate production is evident at very low overpotentials (-0.1 to -0.5 V vs. RHE). Size-selective PdNPs, chemically synthesized at sizes of 3.8-10.7 nm, effected an electrochemical CO reduction reaction in aqueous 0.5 m NaHCO . The faradaic efficiency of formate production (FE ) on 3.8 nm PdNPs exceeded 86 % at E=-0.1 V versus RHE, whereas on 6.5 nm PdNPs an even higher FE of 98 % was observed. However, FE decreased for larger PdNPs. The superior efficiency towards formate production at low overpotentials is rationalized in terms of a changed catalytic pathway through PdH phases. The observed maximum in the formate efficiency for a mean particle size of about 6.5 nm is discussed in terms of counterbalancing the size-dependent effects of a competing CO reduction reaction and a parasitic hydrogen evolution reaction. Production rates of formate are also remarkably high at -0.3 V versus RHE with 539.9 and 452.3 ppm h mg for the 6.5 and 3.8 nm PdNPs, respectively.

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RETRACTED ARTICLE: An overview of CO₂ electroreduction into hydrocarbons and liquid fuels on nanostructured copper catalysts

Cited by 7 publications

References 75 publications

Electrochemical Carbon Dioxide Reduction at Nanostructured Gold, Copper, and Alloy Materials

Electrochemical Carbon Dioxide Reduction at Nanostructured Gold, Copper, and Alloy Materials

The DFT+U: Approaches, Accuracy, and Applications

Size‐Dependent Activity of Palladium Nanoparticles: Efficient Conversion of CO₂ into Formate at Low Overpotentials

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RETRACTED ARTICLE: An overview of CO2 electroreduction into hydrocarbons and liquid fuels on nanostructured copper catalysts

Cited by 7 publications

References 75 publications

Electrochemical Carbon Dioxide Reduction at Nanostructured Gold, Copper, and Alloy Materials

Electrochemical Carbon Dioxide Reduction at Nanostructured Gold, Copper, and Alloy Materials

The DFT+U: Approaches, Accuracy, and Applications

Size‐Dependent Activity of Palladium Nanoparticles: Efficient Conversion of CO2 into Formate at Low Overpotentials

Contact Info

Product

Resources

About

RETRACTED ARTICLE: An overview of CO₂ electroreduction into hydrocarbons and liquid fuels on nanostructured copper catalysts

Size‐Dependent Activity of Palladium Nanoparticles: Efficient Conversion of CO₂ into Formate at Low Overpotentials