Advanced Impedance Analysis for Performance Degradation during Low-Temperature CO2 Electroreduction DOI
Qinhao Chen, Alexander Kube, Dennis Kopljar

et al.

ACS Energy Letters, Journal Year: 2024, Volume and Issue: unknown, P. 6096 - 6103

Published: Nov. 26, 2024

Electrochemical impedance spectroscopy (EIS) is a powerful tool commonly used to study electrochemical systems. Nevertheless, its application in CO2 electroreduction has been so far limited due complex reaction mechanism and environment. Although initial findings have demonstrated the viability of applying EIS analysis electrolyzers, assignment individual processes spectra remains ambiguous. Therefore, more detailed investigation, especially focused on evaluating degradation mechanisms, essential. In this study, stable gas diffusion electrode (GDE) system was developed for comprehensive distribution relaxation time (DRT) evaluation assess key mechanisms under accelerated stress conditions such as high current density low operating temperature. Validated by post-mortem complementary methods, we demonstrate approach operando monitoring assigning mechanistic GDE linking them performance over time.

Language: Английский

Heterogeneous catalysis for the environment DOI
Jun Liu,

Rihana Burciaga,

S. Q. Tang

et al.

The Innovation Materials, Journal Year: 2024, Volume and Issue: unknown, P. 100090 - 100090

Published: Jan. 1, 2024

<p>Anthropogenic climate and environmental changes increasingly threaten the sustainability of life on Earth, hindering sustainable development human societies. These detrimental ecological are driven by activities that have elevated atmospheric levels greenhouse gases toxic substances, increased inorganic organic pollutants in water bodies, led to accumulation solid waste soils. Over next two three decades, impacts change, pollution, soil contamination expected intensify, posing increasing risks health global stability. Considering these trends, it is essential implement robust mitigation adaptation strategies. This paper analyzes pollution problems from perspectives atmospheric, water, contamination. It summarizes current research heterogeneous catalysis for treating gaseous, liquid, phases, with an emphasis key challenges applying catalytic conversion technologies cost-effective industrial settings. Finally, strategies mitigating via discussed material flow, energy data flow. aims offer scientific insights enhance future practice remediation.</p>

Language: Английский

Citations

5
Status and Outlook of Solid Electrolyte Membrane Reactors for Energy, Chemical, and Environmental Applications DOI Creative Commons
Liangdong Fan,

Wanying Luo,

Qunbo Fan

et al.

Chemical Science, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 1, 2025

Solid electrolyte membrane reactors (SEMRs) can be operated at high temperatures with distinct reaction kinetics, or lower (300-500 °C) for industrially relevant energy applications (such as solid oxide fuel/electrolysis cells, direct carbon fuel and metal-air batteries), chemical alkane dehydrogenation, C-C coupling, NH3 synthesis), environmental (De-NO x , CO2 utilization, separation), well their combined (one-step coupled CO2/H2O co-electrolysis methanation reaction, power cogeneration) applications. SEMRs efficiently integrate electrical, chemical, thermal sectors, thereby circumventing thermodynamic constraints production separation issues. They offer a promising way to achieve neutrality improve manufacturing processes. This review thoroughly examines utilizing various ionic conductors, namely O2-, H+, hybrid types, operations in different reactor/cell architectures panel, tubular, single chamber, porous electrolytes). The operate modes including pumping, extraction, reversible, electrical promoting modes, providing multiple functionalities. discussion extends examining critical materials solid-state cells catalysts essential specific technologically important reactions, focusing on electrochemical performance, conversion efficiency, selectivity. also serves first attempt address the potential of process-intensified through integration photo/solar, thermoelectric, plasma explores unique phenomenon promotion catalysis (EPOC) reactors. ultimate goal is insight into ongoing scientific technical challenges like durability operational cost hindering widespread industrial implementation while exploring opportunities this rapidly growing research domain. Although still an early stage limited demonstrations applications, advances materials, science, ionics, reactor design, process intensification and/or system will fill gaps current temperature operation sustainable clean production, efficient conversion/storage, enhancement.

Language: Английский

Citations

0
Heterogeneous nanoporous organic frameworks-based catalysts for electrochemical CO2 reduction reaction DOI Open Access
Yajuan Ma, Guangjin Zhang, Qiuhan Yu

et al.

Energy Materials, Journal Year: 2025, Volume and Issue: 5(6)

Published: Feb. 24, 2025

Converting captured carbon dioxide (CO2) into valuable chemicals and fuels through electrocatalysis realizing the anthropogenic closed-carbon cycle can provide new solutions to environmental energy problems. Nanoporous organic frameworks, including metal-organic frameworks (MOFs) porous polymers (POPs), as a class of potential electrocatalysts, have made great progress in CO2 reduction reaction due their high porosity, large specific surface area, structural/functionalization diversity. In this review, recent developments pristine MOFs/POPs, MOFs/POPs composite, MOFs-/POPs-derived catalysts are discussed from aspects catalyst design, synthesis strategy, test techniques, performance validation, active sites, basic mechanism. We further summarize challenges prospects MOFs/POPs-based materials practical applications for reactions point out paths future research. This review comprehensive reference advanced design systematic cognition efficient nanoporous framework electrocatalytic reduction.

Language: Английский

Citations

0
Impact of Confined and Exposed Nickel Nanoparticles on Electronic Modulation of Atomically Dispersed Nickel for Electrocatalytic Reduction CO2 to CO with an Ultra‐Wide Voltage Range DOI
Zhenyu Yang, Yu Bai, Ping Shao

et al.

Advanced Functional Materials, Journal Year: 2025, Volume and Issue: unknown

Published: April 27, 2025

Abstract The practical development of electrocatalytic CO 2 reduction requires high‐performance electrocatalysts that can operate over a wide voltage range to accommodate the volatility renewable electricity. Herein, impact confined and exposed nanoparticles on ‐to‐CO are explored. A hybrid electrocatalyst consisting Ni single‐atoms (SAs) supported carbon, modified with two types (NPs): (CP) (EP) is designed. Systematic investigations reveal CP significantly enhances activity selectivity SAs catalysts, while EP exacerbates competitive hydrogen evolution, especially at more negative potential. Density functional theory calculations indicate introducing effectively modulates electronic structure active sites, diminishing lowering free energy *COOH formation, stabilizing intermediate, enhancing reaction kinetics formation. In an alkaline flow cell, Faradaic efficiency for (FE ) exceeds 93% across ultra‐wide 1200 mV (from −0.37 −1.57 V vs RHE), achieving maximum FE ≈100% from −0.57 −0.97 V. mixed electrolyte (0.1 m KOH + 0.9 KCl) prolongs stability catalyst.

Language: Английский

Citations

0
Exploring C1-C3 variations and Fischer–Tropsch chemistry via electrochemical CO2 reduction on electrodeposited Cu/Ag and Ag/Cu electrodes DOI
Seon Young Hwang, Gaeun Yun, So Young Kim

et al.

Electrochimica Acta, Journal Year: 2024, Volume and Issue: unknown, P. 145100 - 145100

Published: Sept. 1, 2024

Language: Английский

Citations

2
Beyond catalysts: enhancing electrocatalytic CO2 reduction through diverse strategies DOI
Lu Liu,

Mingzhu Yue,

Bingkun Li

et al.

Catalysis Science & Technology, Journal Year: 2024, Volume and Issue: 14(18), P. 5176 - 5198

Published: Jan. 1, 2024

The current research progress on electrode engineering, electrolyte tailoring, reactor design, and external field-assisting for CO 2 electroreduction is highlighted. intrinsic structure–activity relationships reaction mechanisms are discussed.

Language: Английский

Citations

1
Pd-Based Multi-Site Catalysts for Selective CO2-to-Methanol Conversion DOI

Shuanglong Zhou,

Yu Dai, Qiang Song

et al.

Inorganic Chemistry, Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 17, 2024

Developing a multi-site Pd-based electrocatalyst for CO2-to-C1 conversion with high performance and selectivity in the hydrogenation pathway CO2 electroreduction reaction is both desirable challenging. Here, we develop triple-site metallene (Pd82Bi11In7), which can achieve an unprecedented Faraday efficiency of 72.6 ± 1% methanol production. X-ray photoelectron spectroscopy analysis indicates that some electrons transfer from In Bi to Pd inside Pd82Bi11In7, forming local electron-rich Pd-site, primary electron-deficient center In-site, secondary Bi-site. Meanwhile, Pd82Bi11In7 has stronger adsorption *COOH *CO, avoids generation formic acid CO. Moreover, reduces potential determining step energy barrier controls path direct The synergistic effect triple-sites enables efficient methanol.

Language: Английский

Citations

1
Advanced Impedance Analysis for Performance Degradation during Low-Temperature CO2 Electroreduction DOI
Qinhao Chen, Alexander Kube, Dennis Kopljar

et al.

ACS Energy Letters, Journal Year: 2024, Volume and Issue: unknown, P. 6096 - 6103

Published: Nov. 26, 2024

Electrochemical impedance spectroscopy (EIS) is a powerful tool commonly used to study electrochemical systems. Nevertheless, its application in CO2 electroreduction has been so far limited due complex reaction mechanism and environment. Although initial findings have demonstrated the viability of applying EIS analysis electrolyzers, assignment individual processes spectra remains ambiguous. Therefore, more detailed investigation, especially focused on evaluating degradation mechanisms, essential. In this study, stable gas diffusion electrode (GDE) system was developed for comprehensive distribution relaxation time (DRT) evaluation assess key mechanisms under accelerated stress conditions such as high current density low operating temperature. Validated by post-mortem complementary methods, we demonstrate approach operando monitoring assigning mechanistic GDE linking them performance over time.

Language: Английский

Citations

0