Porous Zn Conformal Coating on Dendritic‐Like Ag with Enhanced Selectivity and Stability for CO<sub>2</sub> Electroreduction to CO

Zhou, Yajiao; Ni, Ganghai; Wu, Kuangzhe; Chen, Qin; Wang, Xiqing; Zhu, Weiwei; He, Zhen; Li, Hongmei; Fu, Junwei; Fu, Junwei

doi:10.1002/adsu.202200374

Cited by 8 publications

(3 citation statements)

References 61 publications

(76 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…(A) Literature overview of Ag-based catalysts for the eCO 2 RR to CO in various electrochemical cells. (B) Comparison between various studies based on the amount of Ag employed, which is expressed as the CO partial current density (mA mg Ag –1 ). − ,− …”

Section: Resultsmentioning

confidence: 99%

Improving Stability of CO₂ Electroreduction by Incorporating Ag NPs in N-Doped Ordered Mesoporous Carbon Structures

Van den Hoek,

Daems,

Arnouts

et al. 2023

ACS Appl. Mater. Interfaces

View full text Add to dashboard Cite

The electroreduction of carbon dioxide (eCO 2 RR) to CO using Ag nanoparticles as an electrocatalyst is promising as an industrial carbon capture and utilization (CCU) technique to mitigate CO 2 emissions. Nevertheless, the long-term stability of these Ag nanoparticles has been insufficient despite initial high Faradaic efficiencies and/or partial current densities. To improve the stability, we evaluated an up-scalable and easily tunable synthesis route to deposit low-weight percentages of Ag nanoparticles (NPs) on and into the framework of a nitrogen-doped ordered mesoporous carbon (NOMC) structure. By exploiting this so-called nanoparticle confinement strategy, the nanoparticle mobility under operation is strongly reduced. As a result, particle detachment and agglomeration, two of the most pronounced electrocatalytic degradation mechanisms, are (partially) blocked and catalyst durability is improved. Several synthesis parameters, such as the anchoring agent, the weight percentage of Ag NPs, and the type of carbonaceous support material, were modified in a controlled manner to evaluate their respective impact on the overall electrochemical performance, with a strong emphasis on operational stability. The resulting powders were evaluated through electrochemical and physicochemical characterization methods, including X-ray diffraction (XRD), N 2 -physisorption, Inductively coupled plasma mass spectrometry (ICP-MS), scanning electron microscopy (SEM), SEM-energy-dispersive X-ray spectroscopy (SEM-EDS), high-angle annular dark field scanning transmission electron microscopy (HAADF-STEM), STEM-EDS, electron tomography, and X-ray photoelectron spectroscopy (XPS). The optimized Ag/soft-NOMC catalysts showed both a promising selectivity (∼80%) and stability compared with commercial Ag NPs while decreasing the loading of the transition metal by more than 50%. The stability of both the 5 and 10 wt % Ag/soft-NOMC catalysts showed considerable improvements by anchoring the Ag NPs on and into a NOMC framework, resulting in a 267% improvement in CO selectivity after 72 h (despite initial losses) compared to commercial Ag NPs. These results demonstrate the promising strategy of anchoring Ag NPs to improve the CO selectivity during prolonged experiments due to the reduced mobility of the Ag NPs and thus enhanced stability.

show abstract

Section: Resultsmentioning

confidence: 99%

Improving Stability of CO₂ Electroreduction by Incorporating Ag NPs in N-Doped Ordered Mesoporous Carbon Structures

Van den Hoek,

Daems,

Arnouts

et al. 2023

ACS Appl. Mater. Interfaces

View full text Add to dashboard Cite

show abstract

“…The preparation of syngas involves both hydrogen evolution and the reduction of CO 2 to CO. Ag or Zn-based catalysts have been reported for CO production, 13 while Ag has been used as a catalyst for the HER. 19 The Ag–Zn composite catalyst is highly expected to exhibit potential application for syngas production.…”

mentioning

confidence: 99%

“…It is noted that Ag-Zn-based catalysts have already been reported for CO 2 reduction. 13,14 However, most of the reduced product is CO.…”

mentioning

confidence: 99%

In situreconstructed AgZn₃nanoparticles supported on zinc nanoplates for efficient CO₂electroreduction to tunable syngas

Xu¹,

Liu²,

Xu³

et al. 2023

Chem. Commun.

View full text Add to dashboard Cite

show abstract

Electrocatalytic CO₂ Reduction to C₂₊ Products in Flow Cells

Chen,

Wang,

Zhou

et al. 2023

Advanced Materials

Self Cite

View full text Add to dashboard Cite

Electrocatalytic CO2 reduction into value‐added fuels and chemicals by renewable electric energy is one of the important strategies to address global energy shortage and carbon emission. Though the classical H‐type electrolytic cell can quickly screen high‐efficiency catalysts, the low current density and limited CO2 mass transfer process essentially impede its industrial applications. The electrolytic cells based on electrolyte flow system (flow cells) have shown great potential for industrial devices, due to higher current density, improved local CO2 concentration and better mass transfer efficiency. The design and optimization of flow cells are of great significance to further accelerate the industrialization of electrocatalytic CO2 reduction reaction (CO2RR). In this review, we are concerned with the progress of flow cells for CO2RR to C2+ products. Firstly, we outline the main events in the development of the flow cells for CO2RR. Secondly, the main design principles of CO2RR to C2+ products, the architectures and types of flow cells are summarized. Thirdly, the main strategies for optimizing flow cells to generate C2+ products are reviewed in detail, including cathode, anode, ion exchange membrane, and electrolyte. Finally, we discuss the preliminary attempts, challenges and the research prospects of flow cells for industrial CO2RR toward C2+ products.This article is protected by copyright. All rights reserved

show abstract

Porous Zn Conformal Coating on Dendritic‐Like Ag with Enhanced Selectivity and Stability for CO₂ Electroreduction to CO

Cited by 8 publications

References 61 publications

Improving Stability of CO₂ Electroreduction by Incorporating Ag NPs in N-Doped Ordered Mesoporous Carbon Structures

Improving Stability of CO₂ Electroreduction by Incorporating Ag NPs in N-Doped Ordered Mesoporous Carbon Structures

In situreconstructed AgZn₃nanoparticles supported on zinc nanoplates for efficient CO₂electroreduction to tunable syngas

Electrocatalytic CO₂ Reduction to C₂₊ Products in Flow Cells

Contact Info

Product

Resources

About

Porous Zn Conformal Coating on Dendritic‐Like Ag with Enhanced Selectivity and Stability for CO2 Electroreduction to CO

Cited by 8 publications

References 61 publications

Improving Stability of CO2 Electroreduction by Incorporating Ag NPs in N-Doped Ordered Mesoporous Carbon Structures

Improving Stability of CO2 Electroreduction by Incorporating Ag NPs in N-Doped Ordered Mesoporous Carbon Structures

In situreconstructed AgZn3nanoparticles supported on zinc nanoplates for efficient CO2electroreduction to tunable syngas

Electrocatalytic CO2 Reduction to C2+ Products in Flow Cells

Contact Info

Product

Resources

About

Porous Zn Conformal Coating on Dendritic‐Like Ag with Enhanced Selectivity and Stability for CO₂ Electroreduction to CO

Improving Stability of CO₂ Electroreduction by Incorporating Ag NPs in N-Doped Ordered Mesoporous Carbon Structures

Improving Stability of CO₂ Electroreduction by Incorporating Ag NPs in N-Doped Ordered Mesoporous Carbon Structures

In situreconstructed AgZn₃nanoparticles supported on zinc nanoplates for efficient CO₂electroreduction to tunable syngas

Electrocatalytic CO₂ Reduction to C₂₊ Products in Flow Cells