Key Components and Design Strategy for a Proton Exchange Membrane Water Electrolyzer

Small Structures, Journal Year: 2022, Volume and Issue: 4(6)

Published: Oct. 27, 2022

As the most attractive energy carrier, hydrogen production through electrochemical water splitting (EWS) is promising for resolving serious environmental problems derived from rapid consumption of fossil fuels globally. The proton exchange membrane electrolyzer (PEMWE) one EWS technologies and has achieved great advancements. To offer a timely reference progress PEMWE system, latest advancements developments technology are systematically reviewed. key components, including electrocatalysts, PEM, porous transport layer (PTL) as well bipolar plate (BPP), first introduced discussed, followed by electrode assembly cell design. highlights put on design electrocatalyst relationship each component performance PEMWE. Moreover, current challenges future perspectives development also discussed. There hope that this review can provide directions in perspectives.

Language: Английский

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Superb All‐pH Hydrogen Evolution Performances Powered by Ultralow Pt‐Decorated Hierarchical Ni‐Mo Porous Microcolumns

Advanced Functional Materials, Journal Year: 2022, Volume and Issue: 33(4)

Published: Nov. 13, 2022

Abstract Achieving efficient and robust hydrogen evolution reaction (HER) electrocatalysts under all‐pH conditions is significant for clean production. Herein, an ultralow Pt‐decorated hierarchical Ni‐Mo porous hybrid, consisting of Ni 3 Mo N on MoO 2 microcolumns, developed HER with remarkable catalytic performances, owing to the structure, strong metal‐support interaction, along Pt nanoparticles multichannel nickel foam support. The superhydrophilic aerophilic surfaces favor mass transport during process. Consequently, Pt/Ni‐Mo‐N‐O microcolumns present activity durability low overpotentials 40.6, 101.1, 89.5 mV obtain 100 mA cm −2 in basic, neutral, acid media, respectively. Moreover, excellent performance alkaline seawater (40.4 mV@100 ) even suppresses most over‐reported catalysts. More importantly, two‐electrode cell, assembled NiMoO 4 as cathode anode, exhibits towards overall‐water electrolysis cell voltage 1.56 V@100 .

Language: Английский

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Functional Bimetal Co‐Modification for Boosting Large‐Current‐Density Seawater Electrolysis by Inhibiting Adsorption of Chloride Ions

Advanced Energy Materials, Journal Year: 2023, Volume and Issue: 13(32)

Published: July 7, 2023

Abstract Designing efficient and durable electrocatalysts for seawater splitting to avoid undesired chlorine evolution reaction resist the corrosive is crucial electrolysis technology. Herein, a functional bimetal (Co Fe) designed specifically modify nickel phosphide (denoted as CoFe‐Ni 2 P) boosting splitting, where Fe atom improves conductivity of Ni P improving electron transfer, Co accelerates self‐reconstruction process favorably generate co‐incorporated NiOOH (CoFe‐NiOOH) species on electrode surface. Additionally, these in situ‐generated CoFe‐NiOOH remarkably inhibit adsorption Cl − ions but selectively adsorb OH ions, which contributes excellent performance large‐current‐density splitting. Therefore, only requires low overpotentials 266 304 mV afford current densities 100 500 mA cm −2 harsh 6 m KOH + electrolyte, can work stably 600 h. Impressively, flow‐type anion exchange membrane electrolyzer assembled by P/Ni‐felt bifunctional demonstrated run at an industrially large density 1.0 A electrolyte 350 h, shows promising application prospects.

Language: Английский

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Electronic Modulation of Metal–Organic Frameworks by Interfacial Bridging for Efficient pH‐Universal Hydrogen Evolution

Advanced Functional Materials, Journal Year: 2022, Volume and Issue: 33(1)

Published: Oct. 26, 2022

Abstract Designing well‐defined interfacial chemical bond bridges is an effective strategy to optimize the catalytic activity of metal–organic frameworks (MOFs), but it remains challenging. Herein, a facile in situ growth reported for synthesis tightly connected 2D/2D heterostructures by coupling MXene with CoBDC nanosheets. The multifunctional nanosheets high conductivity and ideal hydrophilicity as bridging carriers can ensure structural stability sufficient exposure active sites. Moreover, Co–O–Ti formed at interface effectively triggers charge transfer modulates electronic structure Co‐active site, which enhances reaction kinetics. As result, optimized CoBDC/MXene exhibits superior hydrogen evolution (HER) low overpotentials 29, 41, 76 mV 10 mA cm −2 alkaline, acidic, neutral electrolytes, respectively, comparable commercial Pt/C. Theoretical calculation demonstrates that bridging‐induced electron redistribution optimizes free energy water dissociation adsorption, resulting improved evolution. This study not only provides novel electrocatalyst efficient HER all pH conditions also opens up new avenue designing highly systems.

Language: Английский

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Surface reconstruction-derived heterostructures for electrochemical water splitting

EnergyChem, Journal Year: 2022, Volume and Issue: 5(2), P. 100091 - 100091

Published: Sept. 6, 2022

Language: Английский

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