Operando Diagnosis of MEA-Type CO2 Electrolyzer via Distribution of Relaxation Times Analysis DOI
Yunhao Qu,

Kaicong Yang,

Wenzheng Li

et al.

ACS Energy Letters, Journal Year: 2024, Volume and Issue: 9(6), P. 3042 - 3048

Published: May 30, 2024

The membrane electrode assembly (MEA) electrolyzer stands out as the most practical design for CO2 electrolysis. However, its compact configuration poses challenges in monitoring internal dynamic behaviors under real operating conditions. Here, we employ operando electrochemical impedance spectroscopy (EIS) testing and distribution of relaxation times (DRT) analysis to probe complex charge-transfer mass-transport processes within MEA CO conversion. By systematically varying electrolysis parameters, successfully disentangle parameter dependencies identify specific DRT spectra. Furthermore, integrating with post-mortem characterizations, including scanning electron microscopy (SEM) water contact angle measurements, reveals that obstructed mass transport is a significant factor contributing performance failure stability test. These findings emphasize reliability practicality EIS-DRT diagnosing offer promising avenues further improvements lifespan.

Language: Английский

Advances and challenges in the electrochemical reduction of carbon dioxide DOI Creative Commons

Jingyi Han,

Xue Bai,

Xiaoqin Xu

et al.

Chemical Science, Journal Year: 2024, Volume and Issue: 15(21), P. 7870 - 7907

Published: Jan. 1, 2024

This review highlights the structure–activity relationship of ECO 2 RR, provides a detailed summary advanced materials by analyzing electrocatalytic applications and reaction mechanisms, discusses challenges in both devices.

Language: Английский

Citations

48
Observation on Microenvironment Changes of Dynamic Catalysts in Acidic CO2 Reduction DOI
Heming Liu,

Tian Yan,

Shendong Tan

et al.

Journal of the American Chemical Society, Journal Year: 2024, Volume and Issue: 146(8), P. 5333 - 5342

Published: Feb. 19, 2024

Electrochemical CO2 reduction reaction (CO2RR) in acid can solve alkalinity issues while highly corrosive and reductive acidic electrolytes usually cause catalyst degradation. Inhibiting degradation is crucial for the stability of CO2RR. Here, we reveal microenvironment changes dynamic Bi-based catalysts develop a pulse chronoamperometry (CA) strategy to improve In situ fluorescence mappings show that local pH from neutral acid, Raman spectra evolution interfacial water structures microenvironment. We propose surface charge properties affect competitive adsorption K+ protons, thereby causing differences CO2RR intermediate adsorption. also CA reactivate catalysts, improved by 2 orders magnitude 100 h operation, which higher than most reports on This work gives insights how affecting CO2RR, provides guidance designing stable electrolytes.

Language: Английский

Citations

42
Stabilizing the oxidation state of catalysts for effective electrochemical carbon dioxide conversion DOI

Zhitong Wang,

Lizhi Xu, Yansong Zhou

et al.

Chemical Society Reviews, Journal Year: 2024, Volume and Issue: 53(12), P. 6295 - 6321

Published: Jan. 1, 2024

Developing sophisticated strategies to stabilize oxidative metal catalysts based on the correlation between dynamic oxidation state and product profile is favorable for efficient electrochemical CO 2 conversion.

Language: Английский

Citations

34
Beyond Leverage in Activity and Stability toward CO2 Electroreduction to Formate over a Bismuth Catalyst DOI
Wenbin Li, Chang Yu, Xinyi Tan

et al.

ACS Catalysis, Journal Year: 2024, Volume and Issue: 14(10), P. 8050 - 8061

Published: May 8, 2024

The direct production of formate from CO2 over Bi-based catalysts offers a promising route for producing important chemicals using renewable electricity. Nevertheless, limited by the unstable structure and states under electrochemical conditions, electroreduction to is still facing trade-off between activity stability, especially at high current densities. Herein, we reported metal–carbon interfacial modulation strategy synthesize cross-linked defective carbon-modified Bi nanoparticle (Bi-DC) catalyst with stable spatial unique CO2-philic hydrophobic interface. As result, Bi-DC featured remarkable ability in near neutral electrolyte (1 M KHCO3) was even comparable CO2-to-formate strongly basic systems, along partial density formation rate −378 mA cm–2 7 mmol h–1, respectively. Also, it achieved electrolysis 120 h 0.4 A membrane electrode assembly reactor operated stably an industrial large 5 A. carbon species promoted reconstruction dispersion active component Bi, together confinement effect that facilitated long-term electrolysis.

Language: Английский

Citations

21
Effects of Ionic Interferents on Electrocatalytic Nitrate Reduction: Mechanistic Insight DOI

Jinling Fan,

Leslie Arrazolo,

Jiaxin Du

et al.

Environmental Science & Technology, Journal Year: 2024, Volume and Issue: 58(29), P. 12823 - 12845

Published: July 2, 2024

Nitrate, a prevalent water pollutant, poses substantial public health concerns and environmental risks. Electrochemical reduction of nitrate (eNO

Language: Английский

Citations

16
Electrochemical CO2 Reduction: Advances, Insights, Challenges, and Future Directions DOI Creative Commons
Asghar Ali, Muhammad Qasim, S. Sakhi

et al.

Materials Today Sustainability, Journal Year: 2025, Volume and Issue: unknown, P. 101089 - 101089

Published: Feb. 1, 2025

Language: Английский

Citations

2
Reconstructed Bismuth Oxide through in situ Carbonation by Carbonate‐containing Electrolyte for Highly Active Electrocatalytic CO2 Reduction to Formate DOI

Xixi Ren,

Fei Liu, Han‐Chun Wu

et al.

Angewandte Chemie International Edition, Journal Year: 2023, Volume and Issue: 63(9)

Published: Dec. 26, 2023

The catalyst-reconstruction makes it challenging to clarify the practical active sites and unveil actual reaction mechanism during CO

Language: Английский

Citations

33
Recent Progress and Perspective in Pure Water‐Fed Anion Exchange Membrane Water Electrolyzers DOI
Shajahan Shaik, Joyjit Kundu, Yuliang Yuan

et al.

Advanced Energy Materials, Journal Year: 2024, Volume and Issue: 14(35)

Published: July 9, 2024

Abstract Although anion exchange membrane water electrolyzer (AEMWE) is an emerging device in the green hydrogen production industry, use of alkaline electrolyte tackles practicality due to issues lowering system efficiency and environmental impacts. State‐of‐the‐art technology using pure as advancing overcome current challenges AEMWE. In particular, development this requires a comprehensive evaluation techno‐economic aspects, aiming balance innovation with cost considerations. This involves critical advanced catalysts, membranes, devices designed for efficiency, well assessing their economic viability amidst prevailing technological challenges. review delves into timely technical developing water‐fed AEMWE, highlights progress research prospects, suggests opportunities AEMWE technology. also emphasizes importance characterization techniques effective analysis context.

Language: Английский

Citations

16
Ligand‐Hybridization Activates Lattice‐Hydroxyl‐Groups of NiCo(OH)x Nanowires for Efficient Electrosynthesis DOI
Xupo Liu, Xihui Wang,

Chenxing Mao

et al.

Angewandte Chemie International Edition, Journal Year: 2024, Volume and Issue: 63(41)

Published: July 13, 2024

Electrochemical dehydrogenation of hydroxides plays a crucial role in the formation high-valence metal active sites toward 5-hydroxymethylfurfural oxidation reaction (HMFOR) to produce value-added chemical 2,5-furandicarboxylic (FDCA). Herein, we construct benzoic acid ligand-hybridized NiCo(OH)

Language: Английский

Citations

14
Emerging Cu‐Based Tandem Catalytic Systems for CO2 Electroreduction to Multi‐Carbon Products DOI Creative Commons
Qingqing Qin, Hongli Suo, Lijia Chen

et al.

Advanced Materials Interfaces, Journal Year: 2024, Volume and Issue: 11(13)

Published: March 13, 2024

Abstract Conversion of carbon dioxide (CO 2 ) to valuable chemicals and feedstocks through electrochemical reduction holds promise for achieving neutrality mitigating global warming. C 2+ products are interest due their higher economic value. Since the CO conversion process involves multiple steps, tandem catalytic strategies commonly employed in design reaction RR) catalysts systems/reactors. Among diverse that capable reducing CO, Cu stands out more efficiently further converting products. In this review, emerging Cu‐based impact on RR performance, focusing three positional relationships summarized. It delves into integration membrane electrolyzers, utilizing catalyst‐coated substrate (CCS) (CCM) technologies. Several typical examples presented illustrate integration. Finally, challenges prospects applying development catalysts/systems, as well device‐level implementation indicated.

Language: Английский

Citations

11