Water electrolysis: from textbook knowledge to the latest scientific strategies and industrial developments

Chemical Society Reviews, Journal Year: 2022, Volume and Issue: 51(11), P. 4583 - 4762

Published: Jan. 1, 2022

Replacing fossil fuels with energy sources and carriers that are sustainable, environmentally benign, affordable is amongst the most pressing challenges for future socio-economic development.

Language: Английский

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Advanced Transition Metal‐Based OER Electrocatalysts: Current Status, Opportunities, and Challenges

Small, Journal Year: 2021, Volume and Issue: 17(37)

Published: June 10, 2021

Abstract Oxygen evolution reaction (OER) is an important half‐reaction involved in many electrochemical applications, such as water splitting and rechargeable metal–air batteries. However, the sluggish kinetics of its four‐electron transfer process becomes a bottleneck to performance enhancement. Thus, rational design electrocatalysts for OER based on thorough understanding mechanisms structure‐activity relationship vital significance. This review begins with introduction which include conventional adsorbate mechanism lattice‐oxygen‐mediated mechanism. The pathways related intermediates are discussed detail, several descriptors greatly assist catalyst screen optimization summarized. Some parameters suggested measurement criteria also mentioned discussed. Then, recent developments breakthroughs experimental achievements transition metal‐based reviewed reveal novel principles. Finally, some perspectives future directions proposed further catalytic enhancement deeper design. It believed that iterative improvements fundamental principles essential realize applications efficient energy storage conversion technologies.

Language: Английский

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Non-precious-metal catalysts for alkaline water electrolysis: operando characterizations, theoretical calculations, and recent advances

Chemical Society Reviews, Journal Year: 2020, Volume and Issue: 49(24), P. 9154 - 9196

Published: Jan. 1, 2020

Advances of non-precious-metal catalysts for alkaline water electrolysis are reviewed, highlighting operando techniques and theoretical calculations in their development.

Language: Английский

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Engineering active sites on hierarchical transition bimetal oxides/sulfides heterostructure array enabling robust overall water splitting

Nature Communications, Journal Year: 2020, Volume and Issue: 11(1)

Published: Oct. 29, 2020

Rational design of the catalysts is impressive for sustainable energy conversion. However, there a grand challenge to engineer active sites at interface. Herein, hierarchical transition bimetal oxides/sulfides heterostructure arrays interacting two-dimensional MoOx/MoS2 nanosheets attached one-dimensional NiOx/Ni3S2 nanorods were fabricated by oxidation/hydrogenation-induced surface reconfiguration strategy. The NiMoOx/NiMoS array exhibits overpotentials 38 mV hydrogen evolution and 186 oxygen 10 mA cm-2, even surviving large current density 500 cm-2 with long-term stability. Due optimized adsorption energies accelerated water splitting kinetics theory calculations, assembled two-electrode cell delivers industrially relevant densities 1000 record low voltages 1.60 1.66 V excellent durability. This research provides promising avenue enhance electrocatalytic performance engineering interfacial toward large-scale splitting.

Language: Английский

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Rational Design of Nanoarray Architectures for Electrocatalytic Water Splitting

Advanced Functional Materials, Journal Year: 2019, Volume and Issue: 29(20)

Published: Jan. 21, 2019

Abstract Electrochemical water splitting is recognized as a practical strategy for impelling the transformation of sustainable energy sources such solar from electricity to clean hydrogen fuel. To actualize large‐scale production, it paramount develop low‐cost, earth‐abundant, efficient, and stable electrocatalysts. Among those electrocatalysts, alternative architectural arrays grown on conductive substrates have been proven be highly efficient toward due large surface area, abundant active sites, synergistic effects between electrocatalysts substrates. Herein, advancement nanoarray architectures in electrocatalytic applications reviewed. The categories different nanoarrays reliable versatile synthetic approaches are summarized. A unique emphasis highlighted promising strategies enhance activities stability by component manipulation, heterostructure regulation, vacancy engineering. intrinsic mechanism analysis electronic structure optimization, intermediates' adsorption facilitation, coordination environments' amelioration also discussed with regard theoretical simulation situ identification. Finally, challenges opportunities valuable directions pathways outstanding performance provided conversion field, facilitating development systems.

Language: Английский

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Recent progress on earth abundant electrocatalysts for hydrogen evolution reaction (HER) in alkaline medium to achieve efficient water splitting – A review

Journal of Energy Chemistry, Journal Year: 2018, Volume and Issue: 34, P. 111 - 160

Published: Sept. 26, 2018

Language: Английский

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Zirconium‐Regulation‐Induced Bifunctionality in 3D Cobalt–Iron Oxide Nanosheets for Overall Water Splitting

Advanced Materials, Journal Year: 2019, Volume and Issue: 31(28)

Published: May 30, 2019

The design of high-efficiency non-noble bifunctional electrocatalysts for oxygen evolution reaction (OER) and hydrogen (HER) is paramount water splitting technologies associated renewable energy systems. Spinel-structured oxides with rich redox properties can serve as alternative low-cost OER but poor HER performance. Here, zirconium regulation in 3D CoFe2 O4 (CoFeZr oxides) nanosheets on nickel foam, a novel strategy inducing bifunctionality toward overall splitting, reported. It found that the incorporation Zr into tune nanosheet morphology electronic structure around Co Fe sites optimizing adsorption energies, thus effectively enhancing intrinsic activity active sites. as-synthesized CoFeZr oxide exhibits high small overpotential, low Tafel slope, good stability. Moreover, it shows unprecedented overpotential 104 mV at 10 mA cm-2 alkaline media, which better than ever reported counterparts. When employing both anode cathode catalysts current density achieved cell voltage 1.63 V 1.0 m KOH.

Language: Английский

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Recent progress in transition metal phosphides with enhanced electrocatalysis for hydrogen evolution

Nanoscale, Journal Year: 2018, Volume and Issue: 10(46), P. 21617 - 21624

Published: Jan. 1, 2018

The latest advances and perspectives in the development of TMP-based catalysts with enhanced electrocatalysis for hydrogen evolution.

Language: Английский

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Cr‐Doped FeNi–P Nanoparticles Encapsulated into N‐Doped Carbon Nanotube as a Robust Bifunctional Catalyst for Efficient Overall Water Splitting

Advanced Materials, Journal Year: 2019, Volume and Issue: 31(15)

Published: Feb. 21, 2019

Exploring high-efficiency, stable, and cost-effective bifunctional electrocatalysts for overall water splitting is greatly desirable challenging. Herein, a newly designed hybrid catalyst with Cr-doped FeNi-P nanoparticles encapsulated into N-doped carbon nanotubes (Cr-doped FeNi-P/NCN) unprecedented electrocatalytic activity developed by simple one-step heating treatment. The as-synthesized FeNi-P/NCN moderate Cr doping exhibits admirable oxygen evolution reaction hydrogen activities overpotentials of 240 190 mV to reach current density 10 mA cm-2 in 1 m KOH solution. When used as catalyst, it needs only 1.50 V give , which superior its typically integrated Pt/C RuO2 counterparts (1.54 @ ). Density functional theory calculation confirms that FeNi-host can effectively alter the relative Gibbs adsorption energy reduces theoretical overpotential. Additionally, synergetic effects between NCNs are regarded significant contributors accelerate charge transfer promote catalysts.

Language: Английский

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Critical Review, Recent Updates on Zeolitic Imidazolate Framework‐67 (ZIF‐67) and Its Derivatives for Electrochemical Water Splitting

Advanced Materials, Journal Year: 2021, Volume and Issue: 34(11)

Published: Nov. 30, 2021

Design and construction of low-cost electrocatalysts with high catalytic activity long-term stability is a challenging task in the field catalysis. Metal-organic frameworks (MOF) are promising candidates as precursor materials development highly efficient for energy conversion storage applications. This review starts summary basic concepts key evaluation parameters involved electrochemical water-splitting reaction. Then, different synthesis approaches reported cobalt-based Zeolitic imidazolate framework (ZIF-67) its derivatives critically reviewed. Additionally, several strategies employed to enhance electrocatalytic ZIF-67-based discussed detail. The present provides succinct insight into ZIF-67 (oxides, hydroxides, sulfides, selenides, phosphide, nitrides, telluride, heteroatom/metal-doped carbon, noble metal-supported derivatives) oxygen evolution reaction (OER), hydrogen (HER), overall water splitting Finally, this concludes associated challenges perspectives on developing best economic, durable materials.

Language: Английский

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