Ag/C composite catalysts derived from spray pyrolysis for efficient electrochemical CO2 reduction

Hong, Jumi; Park, Ki Tae; Kim, Youngeun; Tan, Daniel; Jeon, Ye Eun; Park, Jeong Eun; Youn, Myung-Joong; Jeong, Soon Kwan; Park, Jin-Won; Ko, You Na; Lee, Wonhee

doi:10.1016/j.cej.2021.133384

Cited by 30 publications

(14 citation statements)

References 38 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Recently, Hong and co-workers synthesized Ag/ C catalysts with different weight ratios via spray pyrolysis. [75] The Ag NPs dispersed on the surface and inside of the carbon black support, leading to a hierarchically porous structure, which can enlarge the Ag surface area and the number of active sites. Compared to pure Ag NPs, the charge transfer resistance of Ag/ C composites is much lower due to the outstanding intrinsic properties of carbon black.…”

Section: Ag/carbon Materialsmentioning

confidence: 99%

Design and Synthesis of Ag‐based Catalysts for Electrochemical CO₂ Reduction: Advances and Perspectives

Huang

Yang³

et al. 2022

Chemistry An Asian Journal

View full text Add to dashboard Cite

Ag‐based nanocrystals have emerged as an important candidate for CO2 reduction reaction (CO2RR) owing to the increasing amount of CO2 in the atmosphere, which has shown a propensity to alleviate environmental problems and produce high value‐added chemicals. This paper reviews the surface and interface engineering of Ag‐based catalysts towards CO2RR, which involve in the morphology control, composition manipulation, and support effects. Various synthesis approaches are presented to discuss their influence on the size, crystal structure and morphology of Ag‐based catalysts, including pure Ag NPs, Ag‐based alloys, Ag/metal oxides composites as well as Ag/carbon materials. Next, the development of Ag‐based surface and interface engineering that is essential to accelerate the formation of CO and its further conversion to C1 or even multicarbon products is systematically discussed. Finally, we give a short conclusion, and perspectives on the rational design of Ag‐based catalysts based on surface and interface engineering will be discussed.

show abstract

Section: Ag/carbon Materialsmentioning

confidence: 99%

Design and Synthesis of Ag‐based Catalysts for Electrochemical CO₂ Reduction: Advances and Perspectives

Huang

Yang³

et al. 2022

Chemistry An Asian Journal

View full text Add to dashboard Cite

show abstract

“…However, its practical application has been significantly challenged by its uncontrollable product selectivity in electrochemical CO 2 RR due to the complicated reaction pathways and overdiversified products. Given that CO is the most common and simplest product, which is of high value in the C 1 chemical product chain, the electrochemical CO 2 -to-CO reduction reaction with only two electrons getting involved in the CO 2 RR could achieve high activity and high selectivity as expected. − In the past years, some noble-metal (e.g., Ag, − Au, − etc. )-based catalysts have revealed excellent electrochemical performances for CO 2 RR, which could effectively reduce CO 2 to CO at relatively low overpotentials.…”

Section: Introductionmentioning

confidence: 97%

Atomically Dispersed Metal–Nitrogen–Carbon Catalysts with d-Orbital Electronic Configuration-Dependent Selectivity for Electrochemical CO₂-to-CO Reduction

et al. 2023

View full text Add to dashboard Cite

A variety of atomically dispersed transition-metal-anchored nitrogen-doped carbon (M−N−C) electrocatalysts have shown encouraging electrochemical CO 2 reduction reaction (CO 2 RR) performance, with the underlying fundamentals of central transition-metal atom determined CO 2 RR activity and selectivity yet remaining unclear. Herein, a universal impregnation-acid leaching method was exploited to synthesize various M− N−C (M: Fe, Co, Ni, and Cu) single-atom catalysts (SACs), which revealed d-orbital electronic configuration-dependent activity and selectivity toward CO 2 RR for CO production. Notably, Ni−N−C exhibits a very high CO Faradaic efficiency (FE) of 97% at −0.65 V versus RHE and above 90% CO selectivity in the potential range from −0.5 to −0.9 V versus RHE, much superior to other M−N−C (M: Fe, Co, and Cu). With the d-orbital electronic configurations of central metals in M−N−C SACs well elucidated by crystal-field theory, Dewar−Chatt−Duncanson (DCD) and differential charge density analysis reveal that the vacant outermost dorbital of Ni 2+ in a Ni−N−C SAC would benefit the electron transfer from the C atoms in CO 2 molecules to the Ni atoms and thuseffectively activate the surface-adsorbed CO 2 molecules. However, the outermost d-orbital of Fe 3+ , Co 2+ , and Cu 2+ occupied by unpaired electrons would weaken the electron-transfer process and then impede CO 2 activation. In situ spectral investigations demonstrate that the generation of *COOH intermediates is favored over Ni−N−C SAC at relatively low applied potentials, supporting its high CO 2 -to-CO conversion performance. Gibbs free energy difference analysis in the rate-limiting step in CO 2 RR and hydrogen evolution reaction (HER) reveals that CO 2 RR is thermodynamically favored for Ni−N−C SAC, explaining its superior CO 2 RR performance as compared to other SACs. This work presents a facile and general strategy to effectively modulate the CO 2to-CO selectivity from the perspective of electronic configuration of central metals in M−N−C SACs.

show abstract

“…20,28 Besides the design of novel catalysts, the optimization of the microenvironment is equally critical to render acidic CO 2 RR feasible. [29][30][31][32][33][34] For instance, a hydrophobic chemical environment has been proven to benet the CO 2 RR due to the high local CO 2 / H 2 O ratio in the gas diffusion electrode (GDE). 23,35 It can be realized by adding polytetrauoroethylene nanoparticles into the catalyst layer.…”

Section: Introductionmentioning

confidence: 99%

Confinement of an alkaline environment for electrocatalytic CO₂ reduction in acidic electrolytes

Zhang

et al. 2023

Chem. Sci.

View full text Add to dashboard Cite

show abstract

Ag/C composite catalysts derived from spray pyrolysis for efficient electrochemical CO2 reduction

Cited by 30 publications

References 38 publications

Design and Synthesis of Ag‐based Catalysts for Electrochemical CO₂ Reduction: Advances and Perspectives

Design and Synthesis of Ag‐based Catalysts for Electrochemical CO₂ Reduction: Advances and Perspectives

Atomically Dispersed Metal–Nitrogen–Carbon Catalysts with d-Orbital Electronic Configuration-Dependent Selectivity for Electrochemical CO₂-to-CO Reduction

Confinement of an alkaline environment for electrocatalytic CO₂ reduction in acidic electrolytes

Contact Info

Product

Resources

About

Ag/C composite catalysts derived from spray pyrolysis for efficient electrochemical CO2 reduction

Cited by 30 publications

References 38 publications

Design and Synthesis of Ag‐based Catalysts for Electrochemical CO2 Reduction: Advances and Perspectives

Design and Synthesis of Ag‐based Catalysts for Electrochemical CO2 Reduction: Advances and Perspectives

Atomically Dispersed Metal–Nitrogen–Carbon Catalysts with d-Orbital Electronic Configuration-Dependent Selectivity for Electrochemical CO2-to-CO Reduction

Confinement of an alkaline environment for electrocatalytic CO2 reduction in acidic electrolytes

Contact Info

Product

Resources

About

Design and Synthesis of Ag‐based Catalysts for Electrochemical CO₂ Reduction: Advances and Perspectives

Design and Synthesis of Ag‐based Catalysts for Electrochemical CO₂ Reduction: Advances and Perspectives

Atomically Dispersed Metal–Nitrogen–Carbon Catalysts with d-Orbital Electronic Configuration-Dependent Selectivity for Electrochemical CO₂-to-CO Reduction

Confinement of an alkaline environment for electrocatalytic CO₂ reduction in acidic electrolytes