Rapid complete reconfiguration induced actual active species for industrial hydrogen evolution reaction

Nature Communications, Год журнала: 2022, Номер 13(1)

Опубликована: Окт. 2, 2022

Rational regulation of electrochemical reconfiguration and exploration activity origin are important foundations for realizing the optimization electrocatalyst activity, but rather challenging. Herein, we potentially develop a rapid complete strategy heterostructures CoC2O4 coated by MXene nanosheets (CoC2O4@MXene) during hydrogen evolution reaction (HER) process. The self-assembled CoC2O4@MXene nanotubular structure has high electronic accessibility abundant electrolyte diffusion channels, which favor reconfiguration. Such creates new actual catalytic active species Co(OH)2 transformed from CoC2O4, is coupled with to facilitate charge transfer decrease free energy Volmer step toward fast HER kinetics. reconfigured components require low overpotentials 28 216 mV at 10 1000 mA cm-2 in alkaline conditions decent stability natural seawater. This work gives insights understanding formation opens up way high-performance electrocatalysts.

Язык: Английский

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PEM water electrolysis for hydrogen production: fundamentals, advances, and prospects

Carbon Neutrality, Год журнала: 2022, Номер 1(1)

Опубликована: Июнь 2, 2022

Hydrogen, as a clean energy carrier, is of great potential to be an alternative fuel in the future. Proton exchange membrane (PEM) water electrolysis hailed most desired technology for high purity hydrogen production and self-consistent with volatility renewable energies, has ignited much attention past decades based on current density, greater efficiency, small mass-volume characteristic, easy handling maintenance. To date, substantial efforts have been devoted development advanced electrocatalysts improve electrolytic efficiency reduce cost PEM electrolyser. In this review, we firstly compare alkaline (AWE), solid oxide (SOE), highlight advantages electrolysis. Furthermore, summarize recent progress including evolution reaction (HER) oxygen (OER) acidic electrolyte. We also introduce other cell components (including electrode assembly, collector, bipolar plate). Finally, challenges outlook future application are provided.

Язык: Английский

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Anion Exchange Membrane Water Electrolyzer: Electrode Design, Lab-Scaled Testing System and Performance Evaluation

EnergyChem, Год журнала: 2022, Номер 4(5), С. 100087 - 100087

Опубликована: Авг. 4, 2022

Язык: Английский

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A short review on generation of green fuel hydrogen through water splitting

International Journal of Hydrogen Energy, Год журнала: 2022, Номер 48(2), С. 523 - 541

Опубликована: Окт. 20, 2022

Язык: Английский

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Microwave Synthesis of Pt Clusters on Black TiO₂ with Abundant Oxygen Vacancies for Efficient Acidic Electrocatalytic Hydrogen Evolution

Angewandte Chemie International Edition, Год журнала: 2023, Номер 62(14)

Опубликована: Фев. 9, 2023

Oxygen vacancies-enriched black TiO2 is one promising support for enhancing hydrogen evolution reaction (HER). Herein, oxygen vacancies enriched supported sub-nanometer Pt clusters (Pt/TiO2 -OV ) with metal interactions designed through solvent-free microwave and following low-temperature electroless approach the first time. High-temperature strong reductants are not required then can avoid aggregation of decorated species. Experimental theoretical calculation verify that created exhibit synergistic effects optimizing kinetics. Based on it, Pt/TiO2 presents remarkable electrocatalytic performance 18 mV to achieve 10 mA cm-2 coupled small Tafel slope 12 dec-1 . This work provides quick synthetic strategy preparing titanium dioxide based nanomaterials.

Язык: Английский

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Sandwich-like CoMoP2/MoP heterostructures coupling N, P co-doped carbon nanosheets as advanced anodes for high-performance lithium-ion batteries

Advanced Composites and Hybrid Materials, Год журнала: 2022, Номер 5(3), С. 2601 - 2610

Опубликована: Авг. 20, 2022

Язык: Английский

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Ruthenium-doped 3D Cu2O nanochains as efficient electrocatalyst towards hydrogen evolution and hydrazine oxidation

Applied Catalysis B Environment and Energy, Год журнала: 2022, Номер 325, С. 122305 - 122305

Опубликована: Дек. 24, 2022

Язык: Английский

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

Advanced Functional Materials, Год журнала: 2022, Номер 33(4)

Опубликована: Ноя. 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 .

Язык: Английский

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Metallic-Bonded Pt–Co for Atomically Dispersed Pt in the Co₄N Matrix as an Efficient Electrocatalyst for Hydrogen Generation

ACS Nano, Год журнала: 2022, Номер 16(11), С. 18038 - 18047

Опубликована: Ноя. 2, 2022

Exploiting highly efficient electrocatalysts toward hydrogen evolution reaction (HER) has a significant role in the mass production of energy through water electrolysis. Herein, ginkgo leaf-like Co4N coupled with trace Pt metallic bond Pt–Co on nickel foam via solvothermal, tannic acid treated, and nitridation procedures for HER (T-Pt-Co4N) is developed. It only requires low overpotentials 31 mV 27 to achieve 10 mA cm–2 alkaline neutral electrolytes, respectively, surpassing benchmark Pt/C previously reported values. Moreover, it presents excellent long-term stability studied media also can drive overall splitting under assistance sustainable energies. The specific nanostructure favors acceleration electrocatalytic process by exposing abundant active sites providing numerous transport channels during catalytic process. experimental theoretical calculation demonstrate that atomic coordinates Co form act as crucial boost performance optimizing kinetics HER.

Язык: Английский

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

Advanced Functional Materials, Год журнала: 2022, Номер 33(1)

Опубликована: Окт. 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.

Язык: Английский

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