Water electrolysis for hydrogen production: from hybrid systems to self-powered/catalyzed devices

Energy & Environmental Science, Journal Year: 2023, Volume and Issue: 17(1), P. 49 - 113

Published: Nov. 7, 2023

This perspective highlights recent advancements in innovative strategies to provide valuable insights into the potential for energy-saving hydrogen production through water electrolysis.

Language: Английский

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Dual-doping NiMoO4 with multi-channel structure enable urea-assisted energy-saving H2 production at large current density in alkaline seawater

Applied Catalysis B Environment and Energy, Journal Year: 2022, Volume and Issue: 320, P. 121977 - 121977

Published: Sept. 13, 2022

Language: Английский

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Electrocatalysts for Zinc–Air Batteries Featuring Single Molybdenum Atoms in a Nitrogen‐Doped Carbon Framework

Advanced Materials, Journal Year: 2023, Volume and Issue: 35(35)

Published: June 16, 2023

Bifunctional catalysts can facilitate two different electrochemical reactions with conflicting characteristics. Here, a highly reversible bifunctional electrocatalyst for rechargeable zinc-air batteries (ZABs) is reported featuring "core-shell structure" in which N-doped graphene sheets wrap around vanadium molybdenum oxynitride nanoparticles. Single Mo atoms are released from the particle core during synthesis and anchored to electronegative N-dopant species graphitic shell. The resultant single-atom excel as active oxygen evolution reaction (OER) sites pyrrolic-N reduction (ORR) pyridinic-N environments. ZABs such multicomponent deliver high power density (≈376.4 mW cm-2 ) long cycle life of over 630 h, outperforming noble-metal-based benchmarks. Flexible that tolerate wide range temperatures (-20 80 °C) under severe mechanical deformation also demonstrated.

Language: Английский

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Single-Atom and Bimetallic Nanoalloy Supported on Nanotubes as a Bifunctional Electrocatalyst for Ultrahigh-Current-Density Overall Water Splitting

ACS Catalysis, Journal Year: 2022, Volume and Issue: 12(2), P. 1167 - 1179

Published: Jan. 5, 2022

Developing exceedingly efficient, cost-effective, and environmentally friendly bifunctional catalysts for the hydrogen evolution reaction (HER) oxygen (OER) especially at high current density is crucial realizing industrial application of electrocatalytic overall water splitting. In this work, non-noble-metal with single Ni atoms, Fe NiFe nanoalloys supported on carbon nanotubes (NiSAFeSA-NixFe/CNT) are rationally designed fabricated. 1 M KOH, optimized NiSAFeSA-Ni50Fe/CNT catalyst affords low overpotentials 64 227 mV 10 mA cm–2 catalyzing HER OER, respectively. Moreover, enables splitting a cell voltage 1.49 V to achieve in KOH. At 1.80 V, as 382 cm–2, which surpasses those most materials reported so far. After simple two-step oxidation rereduction procedure, catalytic performances HER, recover completely their original levels. This work not only provides potential candidate economically but also shows method reactivatable design.

Language: Английский

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Fine-tune the electronic structure in Co-Mo based catalysts to give easily coupled HER and OER catalysts for effective water splitting

Applied Catalysis B Environment and Energy, Journal Year: 2023, Volume and Issue: 328, P. 122474 - 122474

Published: Feb. 15, 2023

Language: Английский

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Asymmetric CoN₃P₁ Trifunctional Catalyst with Tailored Electronic Structures Enabling Boosted Activities and Corrosion Resistance in an Uninterrupted Seawater Splitting System

Advanced Materials, Journal Year: 2022, Volume and Issue: 34(34)

Published: July 5, 2022

Employing seawater splitting systems to generate hydrogen can be economically advantageous but still remains challenging, particularly for designing efficient and high Cl- -corrosion resistant trifunctional catalysts toward the oxygen reduction reaction (ORR), evolution (OER), (HER). Herein, single CoNC with well-defined symmetric CoN4 sites are selected as atomic platforms electronic structure tailoring. Density function theory reveals that P-doping into lead formation of asymmetric CoN3 P1 symmetry-breaking structures, enabling affinity strong oxygen-containing intermediates, moderate H adsorption, weak adsorption. Thus, ORR/OER/HER activities stability optimized simultaneously resistance. The based catalyst boosted performance endows seawater-based Zn-air batteries (S-ZABs) superior long-term over 750 h allows operate continuously 1000 h. A self-driven powered by S-ZABs gives ultrahigh H2 production rates 497 μmol h-1 . This work is first advance scientific understanding competitive adsorption mechanism between intermediates from perspective structure, paving way synthesis

Language: Английский

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Progress and Perspectives for Solar‐Driven Water Electrolysis to Produce Green Hydrogen

Advanced Energy Materials, Journal Year: 2023, Volume and Issue: 13(16)

Published: March 9, 2023

Abstract Solar‐driven water electrolysis has been considered to be a promising route produce green hydrogen, because the conventional system is not completely renewable as it requires power from nonrenewable fossil fuel sources. This review emphasizes strategies for solar‐driven electrolysis, including construction of photovoltaic (PV)‐water electrolyzer systems, PV‐rechargeable energy storage device‐water systems with solar sole input energy, and photoelectrochemical splitting systems. The basic discussions above are first presented. Meanwhile, replacing oxygen evolution reaction electrooxidation organic compounds can effectively improve efficiency splitting. Also, seawater greatly broadens practical applications due abundant reserves seawater. Recent years have witnessed great development in field electrolysis. recent research area subsequently reviewed. Finally, perspectives on existing challenges along some opportunities further provided.

Language: Английский

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Recent advances in interface engineering strategy for highly‐efficient electrocatalytic water splitting

InfoMat, Journal Year: 2022, Volume and Issue: 5(1)

Published: Oct. 13, 2022

Abstract The hydrogen energy generated by the electrocatalytic water splitting reaction has been established as a renewable and clean carrier with ultra‐high density, which can well make up for shortcomings of conventional sources, such geographical limitations, climatic dependence, wastage. Notably, introduction electrocatalysts enhance efficiency process to generate hydrogen. Particularly, heterostructure constructed coupling multiple components (or phases) have emerged most promising option due well‐known electronic synergistic effects. existing reviews on interface engineering electrocatalyst design mostly focus relationship between heterostructures specific reactions. However, comprehensive overview integration model building, directional synthesis, mechanism rarely reported. To this end, in review, development catalysts is systematically introduced from perspective classification, growth regulation performance based interfacial microenvironment (bonding, configuration, lattice strain, etc.), thereby offering useful insights construction models. Besides, combined current applications strategies, challenges future are discussed relevant solutions proposed. Overall, review serve theoretical reference mechanism, further promote production technologies low consumption high yield. image

Language: Английский

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Emerging Trends of Carbon‐Based Quantum Dots: Nanoarchitectonics and Applications

Small, Journal Year: 2023, Volume and Issue: 19(17)

Published: Jan. 24, 2023

Carbon-based quantum dots (QDs) have emerged as a fascinating class of advanced materials with unique combination optoelectronic, biocompatible, and catalytic characteristics, apt for plethora applications ranging from electronic to photoelectrochemical devices. Recent research works established carbon-based QDs those frontline through improvements in design, processing, device stability. This review broadly presents the recent progress synthesis QDs, including carbon graphene graphitic nitride their heterostructures, well salient applications. The methods are first introduced, followed by an extensive discussion dependence performance on intrinsic properties nanostructures aiming present general strategies designing optimal performance. Furthermore, diverse presented, emphasis relationship between band alignment, charge transfer, improvement. Among discussed this review, much focus is given photo electrocatalytic, energy storage conversion, bioapplications, which pose grand challenge rational designs. Finally, summary existing challenges future directions elaborated.

Language: Английский

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Construction of dual heterogeneous interface between zigzag-like Mo–MXene nanofibers and small CoNi@NC nanoparticles for electromagnetic wave absorption

Journal of Advanced Ceramics, Journal Year: 2023, Volume and Issue: 12(8), P. 1562 - 1576

Published: May 24, 2023

Two-dimensional (2D) transition metal carbides (MXene) process attractive conductivity and abundant surface functional groups, providing immense potential in the field of electromagnetic wave (EMW) absorption. However, high spontaneous aggregation MXene suffer from limited EMW response. Inspired by dielectric-magnetic synergy effect, strategy decorating with magnetic elements is expected to solve this challenge. In work, zigzag-like Mo₂TiC₂ nanofiber (Mo-MXene NFs) cross-linked networks are fabricated using HF etching KOH shearing processes. Subsequently, Co-MOF derived CoNi LDH ultrathin nanosheets grown inside Mo-MXene NFs, N-doped carbon matrix anchored alloy nanoparticles formed pyrolysis firmly embedded NFs network. Benefiting synergistic effect highly dispersed small nanoparticles, a 3D conductive network assembled numerous hollow vesicles, dual heterogeneous interface, designed Mo-MXene/CoNi-NC heterostructure provides robust absorption ability reflection loss (R_L) value -68.45 dB at matching thickness 4.38 mm. The performance can be attributed excellent dielectric losses, loss, impedance matching, multiple scattering triggered unique structure. This work puts up great developing advanced MXene-based devices.

Language: Английский

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