Surface Oxidized Ag Nanofilms Towards Highly Effective CO<sub>2</sub> Reduction

Xie, Zhongyuan; Qiu, Yuan; Gao, Sanshuang; Sun, Jiaqiang; Cao, Huanqi; Zhang, Shusheng; Luo, Jun; Liu, Xijun

doi:10.1002/celc.202100921

Cited by 9 publications

(9 citation statements)

References 49 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The anodic reaction during discharge is the same as Equations (4)(5)(6)(7)(8). Overall reaction during discharge can be described as follows…”

Section: E θmentioning

confidence: 99%

“…Excessive fossil energy resource consumption and extreme CO 2 emission cause serious environmental problems and energy crises. [1][2][3][4][5][6][7][8][9][10][11][12][13] One of the feasible ways to address these issues is to develop renewable energy conversion and storage technologies, such as water/seawater splitting, fuel cells, metal-ion batteries, and rechargeable metal-air/CO 2 batteries. [14][15][16][17][18][19][20][21][22][23][24][25] In particular, rechargeable aqueous Zn-CO 2 batteries are gaining particular attention due to their unique feature of simultaneous fixing CO 2 and generating electrical energy, as well as the high theoretical energy density, abundant raw materials, and high safety.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Atomically Dispersed Metal‐Based Catalysts for Zn–CO₂Batteries

et al. 2022

Self Cite

View full text Add to dashboard Cite

Rechargeable aqueous Zn–CO2 batteries show great promise in meeting severe environmental problems and energy crises due to their combination of CO2 utilization and energy output, as well as advantages of high theoretical energy density, abundant raw materials, and high safety. Developing high‐efficiency and stable CO2 reduction reaction (CO2RR) electrocatalysts is of critical importance for the promotion of this technology. Atomically dispersed metal‐based catalysts (ADMCs), with extremely high atom‐utilization efficiency, tunable coordination environments, and superior intrinsic catalytic activity, are emerging as promising candidates for Zn–CO2 batteries. Herein, some recent developments in atomically dispersed metal‐based catalysts for Zn–CO2 batteries are summarized, including transition metal and non‐transition metal sites. Moreover, various synthetic strategies, characterization methods, and the relationship between active site structures and CO2RR activity/Zn–CO2 battery performance are introduced. Finally, some challenges and perspectives are also proposed for the future development of ADMCs in Zn–CO2 batteries.

show abstract

“…The anodic reaction during discharge is the same as Equations (4)(5)(6)(7)(8). Overall reaction during discharge can be described as follows…”

Section: E θmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Atomically Dispersed Metal‐Based Catalysts for Zn–CO₂Batteries

et al. 2022

Self Cite

View full text Add to dashboard Cite

show abstract

“…As presented in Fig. 1a, for the synthesis of m-CuOx nanofilm, a peice of carbon paper was first placed on the sample holder, and then the Cu2O powder was evaporated via high-temperature pyrolysis, and subsequently coated on the surface of carbon paper to obtain m-CuOx nanofilm 28,29 . It is expected that the nano-scale thickness of deposited catalyst layer is beneficial to the mass and charge transfer during the CO2 electrolysis.…”

Section: Resultsmentioning

confidence: 99%

Oxygen Vacancy-Rich Amorphous Copper Oxide Enables Highly Selective Electroreduction of Carbon Dioxide to Ethylene

Wei¹,

Zhang²,

Liu³

et al. 2022

Acta Physico Chimica Sinica

Self Cite

View full text Add to dashboard Cite

The ever-increasing carbon dioxide (CO2) emissions caused by excessive fossil fuel consumption induce environmental issues such as global warming. To overcome this, the electrocatalytic CO2 reduction (ECR) under ambient conditions offers an appealing approach for converting CO2 to value-added chemicals and realizing a closed carbon loop. Among the ECR products, ethylene (C2H4), an important building block for plastics and other chemicals, has attracted considerable attention owing to its compatibility with existing infrastructure and the promising substitution of industrial steam cracking. In recent years, numerous efforts have been devoted to developing highly active and selective catalysts for converting CO2 to C2H4, with most studies having focused on Cu-based materials. Despite the significant advancements made to date, the development of the ECR-to-C2H4 process is still hindered by the lack of suitable catalysts that can effectively activate CO2 and strengthen the surface binding of *CO and *COH species. In this study, an amorphous copper oxide (CuOx) nanofilm that is rich in oxygen vacancies was prepared via a facile vacuum evaporation method for the efficient electrocatalytic conversion of CO2 to C2H4. It was expected that the nano-scale electrode thickness would greatly accelerate charge-and mass-transfer during CO2 electrolysis. Moreover, the introduction of oxygen vacancies favored the adsorption of CO2 and intermediates. As a result, in a typical H-cell, the synthesized defective catalyst delivered a maximum Faradaic efficiency of 85 ± 3% at −1.3 V versus the reversible hydrogen electrode and maintained a stable C2H4 selectivity over 48 h in a 0.1 M potassium bicarbonate solution. Interestingly, the performance observed with the synthesized electrocatalyst in this study is comparable with that of state-of-the-art Cu-based ECR catalysts. Additional structural and chemical characterizations confirmed the robust nature of the as-prepared catalyst. Moreover, when the catalyst was utilized in a membrane electrode assembly cell, it achieved a maximum C2H4 partial current density of approximately 115.4 mA•cm 2 at a cell voltage of −1.95 V and Faradaic efficiency of 78 ± 2% at a cell voltage of −1.75 V. Furthermore, theoretical and experimental analyses revealed that oxygen defects not only favored CO2 adsorption but also enabled strong affinities for *CO and *COH intermediates, which synergistically contributed to a high selectivity for C2H4 formation. We believe that our present work will motivate the exploration of amorphous Cu-based materials for achieving efficient CO2-to-C2H4 electrolysis and be a guide towards fundamentally understanding the mechanism of catalytic CO2 reduction.

show abstract

“…(3) Structural characterization of HEAs. With the help of high-resolution electron microscopy and fine spectroscopy, the morphology, element distribution, crystal structure, valence state, and coordination number of high-entropy nanoalloys can be characterized; however, it is difficult to directly correspond this information to the structure of the active sites [190][191][192][193][194][195][196][197]. Therefore, we need to characterize the surface structure of HEA NPs with advanced atomic resolution characterization techniques, including element distribution, chemical valence, and local stress distribution, to establish the active site structure model.…”

Section: Discussionmentioning

confidence: 99%

High-entropy alloys in water electrolysis: Recent advances, fundamentals, and challenges

Zhang

Kang

et al. 2023

Sci. China Mater.

Self Cite

View full text Add to dashboard Cite

As a clean energy carrier, hydrogen energy has become part of the global clean energy strategy and one of the necessary routes to achieve global carbon neutrality. Driven by renewable electricity, water electrolysis promises to be an ideal long-term hydrogen production method that can realize net zero carbon emissions. Compared with conventional alloys, high-entropy alloys (HEAs) have much more catalytic active sites due to their unique structural features including occupation disorder and lattice ordering. They have various promising applications in the field of hydrolysis catalysts. Herein, in this review, the mechanisms of electrolysis of water, catalytic principles of HEAs in hydrolysis processes and latest research progress of HEAs as water electrolysis catalysts are summarized. We also provide perspectives on the difficulties and potential linked to novel HEA design approaches in this attractive sector, with a focus on the connection between both the surface morphology and the catalysis activity. The compositions and possible applications of HEAs in water electrolysis and other emerging fields are outlined.

show abstract

Surface Oxidized Ag Nanofilms Towards Highly Effective CO₂ Reduction

Cited by 9 publications

References 49 publications

Atomically Dispersed Metal‐Based Catalysts for Zn–CO₂Batteries

Atomically Dispersed Metal‐Based Catalysts for Zn–CO₂Batteries

Oxygen Vacancy-Rich Amorphous Copper Oxide Enables Highly Selective Electroreduction of Carbon Dioxide to Ethylene

High-entropy alloys in water electrolysis: Recent advances, fundamentals, and challenges

Contact Info

Product

Resources

About

Surface Oxidized Ag Nanofilms Towards Highly Effective CO2 Reduction

Cited by 9 publications

References 49 publications

Atomically Dispersed Metal‐Based Catalysts for Zn–CO2Batteries

Atomically Dispersed Metal‐Based Catalysts for Zn–CO2Batteries

Oxygen Vacancy-Rich Amorphous Copper Oxide Enables Highly Selective Electroreduction of Carbon Dioxide to Ethylene

High-entropy alloys in water electrolysis: Recent advances, fundamentals, and challenges

Contact Info

Product

Resources

About

Surface Oxidized Ag Nanofilms Towards Highly Effective CO₂ Reduction

Atomically Dispersed Metal‐Based Catalysts for Zn–CO₂Batteries

Atomically Dispersed Metal‐Based Catalysts for Zn–CO₂Batteries