Recent development in electrocatalysts for hydrogen production through water electrolysis

International Journal of Hydrogen Energy, Journal Year: 2021, Volume and Issue: 46(63), P. 32284 - 32317

Published: July 30, 2021

Language: Английский

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Self‐Supported Electrocatalysts for Practical Water Electrolysis

Advanced Energy Materials, Journal Year: 2021, Volume and Issue: 11(39)

Published: Sept. 1, 2021

Abstract Over the years, significant advances have been made to boost efficiency of water splitting by carefully designing economic electrocatalysts with augmented conductivity, more accessible active sites, and high intrinsic activity in laboratory test conditions. However, it remains a challenge develop earth‐abundant catalysts that can satisfy demands practical electrolysis, is, outstanding all‐pH electrolyte capacity, direct seawater ability, exceptional performance for overall splitting, superior large‐current‐density activity, robust long‐term durability. In this context, considering features increased species loading, rapid charge, mass transfer, strong affinity between catalytic components substrates, easily‐controlled wettability, as well as, enhanced bifunctional performance, self‐supported are presently projected be most suitable contenders massive scale hydrogen generation. review, comprehensive introduction design fabrication an emphasis on deposited nanostructured catalysts, selection various methods provided. Thereafter, recent development promising applications is reviewed from aforementioned aspects. Finally, brief conclusion delivered challenges perspectives relating promotion sustainable large‐scale production discussed.

Language: Английский

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Phosphated IrMo bimetallic cluster for efficient hydrogen evolution reaction

eScience, Journal Year: 2022, Volume and Issue: 2(3), P. 304 - 310

Published: April 15, 2022

Developing low-cost, high-performance electrocatalysts for the hydrogen evolution reaction (HER) is essential producing from renewable energy sources. Herein, we report phosphated IrMo bimetallic clusters supported by macroporous nitrogen-doped carbon (IrMoP/MNC) as a highly efficient alkaline HER catalyst. The experimental and theoretical results demonstrate that P Mo synergistically tune electronic structure of atomically dispersed Ir to improve adsorption reactant H2O desorption product OH−. itself serves an active site cooperates with nearby atom significantly enhance kinetics. Even only 2.6 ​wt% in catalyst, IrMoP/MNC exhibits ultralow overpotential 14 ​mV at 10 ​mA ​cm−2, well unprecedented high mass activity 18.58 A mgIr−1 100 ​mV, superior commercial Pt/C overwhelmingly better than other Ir-based electrocatalysts. This study demonstrates multi-level design strategy effectively efficiency noble metal, involving spatial geometry, local structure, dual-atom synergy.

Language: Английский

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Design and Synthesis of Hollow Nanostructures for Electrochemical Water Splitting

Advanced Science, Journal Year: 2022, Volume and Issue: 9(9)

Published: Jan. 18, 2022

Abstract Electrocatalytic water splitting using renewable energy is widely considered as a clean and sustainable way to produce hydrogen an ideal fuel for the future. Electrocatalysts are indispensable elements large‐scale electrolysis, which can efficiently accelerate electrochemical reactions occurring at both ends. Benefitting from high specific surface area, well‐defined void space, tunable chemical compositions, hollow nanostructures be applied promising candidates of direct electrocatalysts or supports loading internal external electrocatalysts. Herein, some recent progress in structural design micro‐/nanostructured materials advanced summarized. First, principles corresponding strategies toward highly effective oxygen/hydrogen evolution highlighted. Afterward, overview current reports about with diverse architectural designs functionalities given, including single‐shelled, multi‐shelled, open features heterostructured based on hosts. Finally, future research directions discussed personal perspectives.

Language: Английский

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Water Electrolysis toward Elevated Temperature: Advances, Challenges and Frontiers

Chemical Reviews, Journal Year: 2023, Volume and Issue: 123(11), P. 7119 - 7192

Published: Feb. 7, 2023

Since severe global warming and related climate issues have been caused by the extensive utilization of fossil fuels, vigorous development renewable resources is needed, transformation into stable chemical energy required to overcome detriment their fluctuations as sources. As an environmentally friendly efficient carrier, hydrogen can be employed in various industries produced directly (called green hydrogen). Nevertheless, large-scale production water electrolysis prohibited its uncompetitive cost a high specific demand electricity expenses, which enhancing corresponding thermodynamics kinetics at elevated working temperatures. In present review, effects temperature variation are primarily introduced from perspective cells. Following increasing order temperature, multidimensional evaluations considering materials structures, performance, degradation mechanisms mitigation strategies well stacks systems presented based on alkaline cells polymer electrolyte membrane (ET-AECs ET-PEMECs), ionic conductors (ET-ICs), protonic ceramic (PCECs) solid oxide (SOECs).

Language: Английский

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Prussian blue and its analogues as cathode materials for Na-, K-, Mg-, Ca-, Zn- and Al-ion batteries

Nano Energy, Journal Year: 2022, Volume and Issue: 99, P. 107424 - 107424

Published: May 25, 2022

Language: Английский

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Interface Engineering of NixSy@MnOxHy Nanorods to Efficiently Enhance Overall-Water-Splitting Activity and Stability

Nano-Micro Letters, Journal Year: 2022, Volume and Issue: 14(1)

Published: May 3, 2022

Three-dimensional (3D) core-shell heterostructured NixSy@MnOxHy nanorods grown on nickel foam (NixSy@MnOxHy/NF) were successfully fabricated via a simple hydrothermal reaction and subsequent electrodeposition process. The NixSy@MnOxHy/NF shows outstanding bifunctional activity stability for hydrogen evolution oxygen reaction, as well overall-water-splitting performance. main origins are the interface engineering of NixSy@MnOxHy, shell-protection characteristic MnOxHy, 3D open nanorod structure, which remarkably endow electrocatalyst with high stability. Exploring highly active stable transition metal-based electrocatalysts has recently attracted extensive research interests achieving inherent activity, abundant exposed sites, rapid mass transfer, strong structure overall water splitting. Herein, an coupled strategy was applied to construct three-dimensional heterostructure electrocatalyst. synthesized facile followed by X-ray absorption fine spectra reveal that Mn-S bonds connect interfaces leading electronic interaction, improves intrinsic activities (OER). Besides, efficient protective shell, MnOxHy dramatically inhibits electrochemical corrosion at current densities, enhances potentials. Furthermore, not only exposes enriched but also accelerates electrolyte diffusion bubble desorption. Therefore, exhibits exceptional splitting, low overpotentials 326 356 mV OER 100 500 mA cm-2, respectively, along 150 h cm-2. it presents cell voltage 1.529 V 10 accompanied excellent cm-2 h. This work sheds light exploring strategy.

Language: Английский

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Highly Active Si Sites Enabled by Negative Valent Ru for Electrocatalytic Hydrogen Evolution in LaRuSi

Angewandte Chemie International Edition, Journal Year: 2022, Volume and Issue: 61(32)

Published: June 3, 2022

The discovery and identification of novel active sites are paramount for deepening the understanding catalytic mechanism driving development remarkable electrocatalysts. Here, we reveal that genuine hydrogen evolution reaction (HER) in LaRuSi Si sites, not usually assumed Ru sites. has a peculiar negative valence state, which leads to strong binding Surprisingly, have Gibbs free energy adsorption is near zero (0.063 eV). moderate on during HER process also validated by situ Raman analysis. Based it, exhibits an overpotential 72 mV at 10 mA cm-2 alkaline media, close benchmark Pt/C. This work sheds light recognition real exploration innovative silicide

Language: Английский

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Circumventing Challenges: Design of Anodic Electrocatalysts for Hybrid Water Electrolysis Systems

Advanced Energy Materials, Journal Year: 2022, Volume and Issue: 13(4)

Published: Dec. 15, 2022

Abstract Water electrolysis, driven by renewable energy resources, is a promising conversion technology that has gained intensive interest in recent years. However, conventional water electrolysis faces number of challenges, including large thermodynamic potential gaps, valueless anodic products, explosive hydrogen/oxygen mixtures, reactive oxygen species, and limited pure water. Hybrid appending different electrolytes the anode compartment to circumvent above‐mentioned challenges particularly attractive alternative. In this review, for first time, holistic subtle description hybrid provided, focusing on design high‐activity/selectivity/stability electrocatalysts electrochemical oxidation various chemicals, such as alcohol, aldehyde, amine, urea hydrazine, or evolution reaction seawater electrolytes. Comprehensive judging criteria reactions, electrocatalysts, parameters are discussed. Some technoeconomic assessments, feasibility analyses, mechanism explorations, correlation comparisons involved. Finally, perspectives opportunities future research directions systems outlined.

Language: Английский

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Facile Synthesis of Medium‐Entropy Metal Sulfides as High‐Efficiency Electrocatalysts toward Oxygen Evolution Reaction

Advanced Functional Materials, Journal Year: 2022, Volume and Issue: 33(3)

Published: Nov. 10, 2022

Abstract Developing highly efficient and durable electrocatalysts toward oxygen evolution reaction (OER) is an urgent demand to produce clean hydrogen energy. In this study, a series of medium‐entropy metal sulfides (MEMS) (NiFeCoX) 3 S 4 (where X = Mn, Cr, Zn) are synthesized by facile one‐pot solvothermal strategy using molecular precursors. Benefiting from the multiple‐metal synergistic effect low crystallinity, these MEMS show significantly enhanced electrocatalytic OER activity compared with binary‐metal (NiFe) ternary‐metal (NiFeCo) counterparts. Especially, (NiFeCoMn) delivers overpotential 289 mV at 10 mA cm −2 , decent Tafel slope 75.6 dec −1 robust catalytic stability in alkaline medium, outperforming costly IrO 2 benchmark electrocatalyst majority reported sulfide‐based until now. These synthesis excellent performance bring great opportunity design desirable for practical application.

Language: Английский

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