Morphology-controlled Au nanostructures for efficient and selective electrochemical CO<sub>2</sub>reduction

Kim, Jae-Hoon; Song, Jun; Ryoo, Hyewon; Kim, Jin Gyu; Chung, Sung Yoon; Oh, Jihun

doi:10.1039/c8ta01010b

Cited by 62 publications

(46 citation statements)

References 52 publications

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“…The optimized OD-Cu also has an appropriate surface roughness, inducing a high local pH at the surface for facile CO 2 RR. In addition, our research group systematically studied a controllable Au nanostructure with various electrochemical treatment conditions, and evaluated the CO 2 RR properties [12]. We found the following two significant factors contributing to a higher CO 2 RR rate: (1) increased grain boundaries inside Au nanoparticles for a lower overpotential of CO 2 RR, as previously reported by many groups, and (2) the structure shape for facile diffusion of the reactant and evolved products for high local pH.…”

Section: Synergistic Effectssupporting

confidence: 62%

“…Nanostructuring methods to increase the intrinsic active sites of catalytic materials also have been reported [4][5][6]8,12,13,16]. The Kanan research group synthesized oxide-derived (OD) metal catalysts with Au and Cu (OD-Au and -Cu) by electrochemically reducing Au and Cu oxide [4,5].…”

Section: Nano-and Micro-structuresmentioning

confidence: 99%

“…In recent years, C 2+ selectivity has increased, as many researchers have focused on the development Cu catalysts to target higher-order chemicals, while research on C 1 to not only further improve selectivity, but also reduce the reaction overpotential, has also been consistently conducted. For the development of catalytic materials, researchers have sought to improve their performance with various strategies, such as nanostructuring, surface functionalization, alloying, and optimizing the electrolyte [3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18]. Meanwhile, many factors (e.g., morphology, grain boundary, size, shape, electronic structure, pH, etc.)…”

Section: Introductionmentioning

confidence: 99%

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Towards Higher Rate Electrochemical CO2 Conversion: From Liquid-Phase to Gas-Phase Systems

Song

Kim

et al. 2019

Catalysts

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Electrochemical CO2 conversion offers a promising route for value-added products such as formate, carbon monoxide, and hydrocarbons. As a result of the highly required overpotential for CO2 reduction, researchers have extensively studied the development of catalyst materials in a typical H-type cell, utilizing a dissolved CO2 reactant in the liquid phase. However, the low CO2 solubility in an aqueous solution has critically limited productivity, thereby hindering its practical application. In efforts to realize commercially available CO2 conversion, gas-phase reactor systems have recently attracted considerable attention. Although the achieved performance to date reflects a high feasibility, further development is still required in order for a well-established technology. Accordingly, this review aims to promote the further study of gas-phase systems for CO2 reduction, by generally examining some previous approaches from liquid-phase to gas-phase systems. Finally, we outline major challenges, with significant lessons for practical CO2 conversion systems.

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Section: Synergistic Effectssupporting

confidence: 62%

Section: Nano-and Micro-structuresmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Towards Higher Rate Electrochemical CO2 Conversion: From Liquid-Phase to Gas-Phase Systems

Song

Kim

et al. 2019

Catalysts

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“…Kim and co-workers investigated electrochemical parameters determining the morphology of Au nanostructures. [19] Basically, they started with formation of Au(OH) 3 through anodic electrodeposition and then the Au(OH) 3 was structurally converted to either pillar-like nanostructures or pore-like nanostructures depending on reducing conditions such as a fixed reduction rate, a thickness of Au(OH) 3 and the supply rate of electrons. The pore-like Au structures showed high (Figure 2e-f) could be more suitable under vigorous reducing conditions.…”

Section: Electrocatalysts For Production Of C1 Moleculesmentioning

confidence: 99%

Looking Back and Looking Ahead in Electrochemical Reduction of CO₂

Lee

Choi

Lee

2019

The Chemical Record

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Electrochemical reduction of carbon dioxide (CO2) to valuable organic compounds is promising as to recycling of carbon source of CO2 and technical compatibility with systems using renewable energy resources. In recent years, considerable efforts have been devoted to the research field of CO2 conversion using electrocatalysis. This personal account particularly focuses on the recent progress that has been achieved by the Ertl Center and a number of groups in South Korea that becomes one of the larger CO2 emitters. The research trends of catalyst development divided into different categories according to the primary products are presented first. Afterwards, several studies on theoretical calculations and electrolytic reactors are reviewed taking into account the fundamental understanding and feasibility of the CO2 electroreduction. Finally, a perspective on the challenges and needs in achieving the advanced level of research and development is presented.

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“…Furthermore, some shaped Au nanoparticles have been also explored including nanowires [318,319], concave RD [320], pore-like or pillar-like structures [321], and nanocubes [322], among others. In all these cases, a selective conversion of CO 2 to CO is observed.…”

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confidence: 99%

Shape-controlled metal nanoparticles for electrocatalytic applications

Cruz

Montiel

Solla-Gullón

2018

Physical Sciences Reviews

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Abstract The application of shape-controlled metal nanoparticles is profoundly impacting the field of electrocatalysis. On the one hand, their use has remarkably enhanced the electrocatalytic activity of many different reactions of interest. On the other hand, their usage is deeply contributing to a correct understanding of the correlations between shape/surface structure and electrochemical reactivity at the nanoscale. However, from the point of view of an electrochemist, there are a number of questions that must be fully satisfied before the evaluation of the shaped metal nanoparticles as electrocatalysts including (i) surface cleaning, (ii) surface structure characterization, and (iii) correlations between particle shape and surface structure. In this chapter, we will cover all these aspects. Initially, we will collect and discuss about the different practical protocols and procedures for obtaining clean shaped metal nanoparticles. This is an indispensable requirement for the establishment of correct correlations between shape/surface structure and electrochemical reactivity. Next, we will also report how some easy-to-do electrochemical experiments including their subsequent analyses can enormously contribute to a detailed characterization of the surface structure of the shaped metal nanoparticles. At this point, we will remark that the key point determining the resulting electrocatalytic activity is the surface structure of the nanoparticles (obviously, the atomic composition is also extremely relevant) but not the particle shape. Finally, we will summarize some of the most significant advances/results on the use of these shaped metal nanoparticles in electrocatalysis covering a wide range of electrocatalytic reactions including fuel cell-related reactions (electrooxidation of formic acid, methanol and ethanol and oxygen reduction) and also CO2 electroreduction. Graphical Abstract:

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Morphology-controlled Au nanostructures for efficient and selective electrochemical CO₂reduction

Abstract: Morphology-controlled Au nanostructures are fabricatedviaelectroreduction of anodized Au thin films, exhibiting efficient catalytic activity for electrochemical CO2reduction.

Cited by 62 publications

References 52 publications

Towards Higher Rate Electrochemical CO2 Conversion: From Liquid-Phase to Gas-Phase Systems

Towards Higher Rate Electrochemical CO2 Conversion: From Liquid-Phase to Gas-Phase Systems

Looking Back and Looking Ahead in Electrochemical Reduction of CO₂

Shape-controlled metal nanoparticles for electrocatalytic applications

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Morphology-controlled Au nanostructures for efficient and selective electrochemical CO2reduction

Abstract: Morphology-controlled Au nanostructures are fabricatedviaelectroreduction of anodized Au thin films, exhibiting efficient catalytic activity for electrochemical CO2reduction.

Cited by 62 publications

References 52 publications

Towards Higher Rate Electrochemical CO2 Conversion: From Liquid-Phase to Gas-Phase Systems

Towards Higher Rate Electrochemical CO2 Conversion: From Liquid-Phase to Gas-Phase Systems

Looking Back and Looking Ahead in Electrochemical Reduction of CO2

Shape-controlled metal nanoparticles for electrocatalytic applications

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Product

Resources

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Morphology-controlled Au nanostructures for efficient and selective electrochemical CO₂reduction

Looking Back and Looking Ahead in Electrochemical Reduction of CO₂