Hidden parameters for electrochemical carbon dioxide reduction in zero-gap electrolyzers DOI Creative Commons
Lucas Hoof, Niklas Thissen, Kevinjeorjios Pellumbi

et al.

Cell Reports Physical Science, Journal Year: 2022, Volume and Issue: 3(4), P. 100825 - 100825

Published: March 25, 2022

The electrochemical reduction of CO2 from flue gas or direct air capture to relevant syngas mixtures is a promising route toward mitigation environmental pollution and production bulk chemicals fuels. Among the different cell types, gas-fed zero-gap electrolyzers are as energy-efficient scalable devices. We herein investigate influence operational parameters related cathode water management, such orientation, humidification, compression onto CO2R. By stepwise optimization our not yet fully optimized electrolyzer, stability could be improved by factor 3 up 10 h at V 300 mA cm−2. Faradic efficiency for CO after 2 electrolysis was increased 14% over 60%. Controlling management key parameter high input leads flooding electrodes, whereas lower values decrease performance anion exchange membrane reduce catalyst wetting.

Language: Английский

Hydrogen Spillover-Bridged Volmer/Tafel Processes Enabling Ampere-Level Current Density Alkaline Hydrogen Evolution Reaction under Low Overpotential DOI

Huai Qin Fu,

Min Zhou, Peng Fei Liu

et al.

Journal of the American Chemical Society, Journal Year: 2022, Volume and Issue: 144(13), P. 6028 - 6039

Published: March 18, 2022

Water-alkaline electrolysis holds a great promise for industry-scale hydrogen production but is hindered by the lack of enabling evolution reaction electrocatalysts to operate at ampere-level current densities under low overpotentials. Here, we report use spillover-bridged water dissociation/hydrogen formation processes occurring synergistically hybridized Ni3S2/Cr2S3 sites incapacitate inhibition effect high-current-density-induced high coverage dissociation site and concurrently promote Volmer/Tafel processes. The mechanistic insights critically important enable density operation are depicted from experimental theoretical studies. Volmer process drastically boosted strong H2O adsorption Cr5c Cr2S3, efficient H2O* via heterolytic cleavage (Cr5c-H2O* + S3c(#) → Cr5c-OH* S3c-H#) on Cr5c/S3c in rapid desorption OH* Cr2S3via new water-assisted mechanism (Cr5c-OH* H2O(aq) Cr5c-H2O* OH-(aq)), while Tafel achieved through spillover rapidly transfer H# located H-rich (Cr2S3) H-deficient (Ni3S2) with excellent activity. As result, electrocatalyst can readily achieve 3.5 A cm-2 an overpotential 251 ± 3 mV 1.0 M KOH electrolyte. concept exemplified this work provides useful means address shortfalls current-density-tolerant Hydrogen (HER) electrocatalysts.

Language: Английский

Citations

316
Anion Exchange Membrane Water Electrolyzer: Electrode Design, Lab-Scaled Testing System and Performance Evaluation DOI
Qiucheng Xu, Liyue Zhang, Jiahao Zhang

et al.

EnergyChem, Journal Year: 2022, Volume and Issue: 4(5), P. 100087 - 100087

Published: Aug. 4, 2022

Language: Английский

Citations

179
Affordable Green Hydrogen from Alkaline Water Electrolysis: Key Research Needs from an Industrial Perspective DOI Creative Commons
Johan Ehlers, Anders Agentoft Feidenhans'l, Kasper T. Therkildsen

et al.

ACS Energy Letters, Journal Year: 2023, Volume and Issue: 8(3), P. 1502 - 1509

Published: Feb. 26, 2023

Hydrogen is poised to play a key role in the energy transition by decarbonizing hard-to-electrify sectors and enabling storage, transport, trade of renewable energy. Recent forecasts project thousand-fold expansion global water electrolysis capacity as early 2030. In this context, several technologies are likely coexist market, each catering different applications geographies. They face common challenge decreasing cost hydrogen produced, for which efficiency major but not only factor. Perspective, we dispel misconceptions─rooted outdated designs─around alkaline offer an overview main technical pathways reduce from modern systems already under commercialization. By identifying research needs, aim motivate work into overlooked areas that both interesting scientific questions can contribute gigawatt-scale production green short- medium-term.

Language: Английский

Citations

160
The route for commercial photoelectrochemical water splitting: a review of large-area devices and key upscaling challenges DOI Creative Commons
António Vilanova, Paula Dias, Tânia Lopes

et al.

Chemical Society Reviews, Journal Year: 2024, Volume and Issue: 53(5), P. 2388 - 2434

Published: Jan. 1, 2024

Green-hydrogen is considered a "key player" in the energy market for upcoming decades. Among currently available hydrogen (H

Language: Английский

Citations

89
Metal‐Corrole‐Based Porous Organic Polymers for Electrocatalytic Oxygen Reduction and Evolution Reactions DOI
Haitao Lei,

Qingxin Zhang,

Zuozhong Liang

et al.

Angewandte Chemie International Edition, Journal Year: 2022, Volume and Issue: 61(24)

Published: March 31, 2022

Integrating molecular catalysts into designed frameworks often enables improved catalysis. Compared with porphyrin-based frameworks, metal-corrole-based have been rarely developed, although monomeric metal corroles are usually more efficient than porphyrin counterparts for the electrocatalytic oxygen reduction reaction (ORR) and evolution (OER). We herein report on porous organic polymers (POPs) as ORR OER electrocatalysts. M-POPs (M=Mn, Fe, Co, Cu) were synthesized by coupling 10-phenyl-5,15-(4-iodophenyl)corrole tetrakis(4-ethynylphenyl)methane. corrole monomers, displayed significantly enhanced catalytic activity stability. Co-POP outperformed other achieving four-electron a half-wave potential of 0.87 V vs. RHE reaching 10 mA cm-2 current density at 340 mV overpotential. This work is unparalleled to develop explore POPs

Language: Английский

Citations

86
Advances in Carbon Nitride-Based Materials and Their Electrocatalytic Applications DOI

Farzaneh Besharat,

Fatemeh Ahmadpoor, Zahra Nezafat

et al.

ACS Catalysis, Journal Year: 2022, Volume and Issue: 12(9), P. 5605 - 5660

Published: April 26, 2022

As a group of large-surface-area nonmetal materials, polymeric carbon nitride (CxNy) and its hybrid structures are nowadays ever-increasing interest for use in energy devices involved conversion storage, offering low expenses facile production processes. With the growing requirement clean renewable generation storage systems, progress replacement expensive noble-metal catalysts with CxNy-based materials as efficient electrocatalysts has expanded considerably, demand these increased. The modified CxNy architectures beneficial to electrocatalytic applications, improving their moderate electrical conductivities capacity loss. present review strives highlight recent advances research on aforementioned identities CxNy-derived structurally polymorphs. This also discusses fuel cells, metal–air batteries, water splitting supercapacitor applications. Herein, we deal oxidation reduction reactions such hydrogen evolution, oxygen reduction, CO2 nitrogen etc. Each device been studied clearer understanding patent relevant experiments reviewed separately. Additionally, role some general redox capable being exploited any is included.

Language: Английский

Citations

78
Electrochemical CO2 reduction - The macroscopic world of electrode design, reactor concepts & economic aspects DOI Creative Commons

Alina Gawel,

Theresa Jaster,

Daniel Siegmund

et al.

iScience, Journal Year: 2022, Volume and Issue: 25(4), P. 104011 - 104011

Published: March 4, 2022

For the efficient electrochemical conversion of CO2 into valuable chemical feedstocks, a well-coordinated interaction all electrolyzer compartments is required. In addition to catalyst, whose role described in detail part "Electrochemical Reduction toward Multicarbon Alcohols - The Microscopic World Catalysts & Process Conditions" this divided review, general cell setups, design and manufacture electrodes, membranes used, process parameters must be optimally matched. authors' goal provide comprehensive review current literature on how these aspects affect overall performance electrolysis. To economically competitive as an process, framework conditions, i.e., supply reaction product treatment also considered. If key indicators for density, selectivity, voltage, lifetime mentioned techno-economic consideration are met, reduction can make contribution creation closed carbon cycles sustainable energy economy.

Language: Английский

Citations

73
Potential technology for seawater electrolysis: Anion-exchange membrane water electrolysis DOI Creative Commons

Yanjiao Wang,

Min Wang, Yuqing Yang

et al.

Chem Catalysis, Journal Year: 2023, Volume and Issue: 3(7), P. 100643 - 100643

Published: May 25, 2023

Language: Английский

Citations

46
Understanding the factors influencing the corrosion of bipolar plate to the performance and durability of unitized regenerative proton exchange membrane fuel cell: A review DOI
Hock Chin Low, Bee Huah Lim, Mohd Shahbudin Masdar

et al.

International Journal of Hydrogen Energy, Journal Year: 2024, Volume and Issue: 57, P. 420 - 430

Published: Jan. 11, 2024

Language: Английский

Citations

19
Introducing Water‐Network‐Assisted Proton Transfer for Boosted Electrocatalytic Hydrogen Evolution with Cobalt Corrole DOI

Xialiang Li,

Bin Lv, Xuepeng Zhang

et al.

Angewandte Chemie International Edition, Journal Year: 2021, Volume and Issue: 61(9)

Published: Dec. 16, 2021

Abstract Proton transfer is vital for many biological and chemical reactions. Hydrogen‐bonded water‐containing networks are often found in enzymes to assist proton transfer, but similar strategy has been rarely presented by synthetic catalysts. We herein report the Co corrole 1 with an appended crown ether unit its boosted activity hydrogen evolution reaction (HER). Crystallographic H NMR studies proved that of can grab water via bonds. By using protic acids as sources, HER was largely added water, while crown‐ether‐free analogues showed very small enhancement. Inhibition adding 1) external 18‐crown‐6‐ether extract molecules 2) potassium ion or N ‐benzyl‐n‐butylamine block further confirmed critical role assisting grabbed molecules. This work presents a example boost through networks.

Language: Английский

Citations

84