A corrosion-resistant RuMoNi catalyst for efficient and long-lasting seawater oxidation and anion exchange membrane electrolyzer

Nature Communications, Journal Year: 2023, Volume and Issue: 14(1)

Published: June 17, 2023

Direct seawater electrolysis is promising for sustainable hydrogen gas (H2) production. However, the chloride ions in lead to side reactions and corrosion, which result a low efficiency poor stability of electrocatalyst hinder use technology. Here we report corrosion-resistant RuMoNi electrocatalyst, situ-formed molybdate on its surface repel ions. The works stably over 3000 h at high current density 500 mA cm-2 alkaline electrolytes. Using catalyst an anion exchange membrane electrolyzer, energy conversion 77.9% 1000 1.72 V. calculated price per gallon gasoline equivalent (GGE) H2 produced $ 0.85, lower than 2026 technical target 2.0/GGE set by United Stated Department Energy, thus, suggesting practicability

Language: Английский

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Hydrogen society: from present to future

Energy & Environmental Science, Journal Year: 2023, Volume and Issue: 16(11), P. 4926 - 4943

Published: Jan. 1, 2023

Systematic insights into the recent attainments, limitations, and future directions of hydrogen production, storage, delivery, usage are provided, aiming at offering critical guidance for establishment a society.

Language: Английский

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Defect engineering of two-dimensional materials for advanced energy conversion and storage

Chemical Society Reviews, Journal Year: 2023, Volume and Issue: 52(5), P. 1723 - 1772

Published: Jan. 1, 2023

Defective two-dimensional (2D) materials show huge potential for energy-related fields. This review overviews the formation/evolution mechanisms and engineering strategies of defects in 2D materials, which enable enhanced electrode reaction kinetics.

Language: Английский

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Emerging materials and technologies for electrocatalytic seawater splitting

Science Advances, Journal Year: 2023, Volume and Issue: 9(42)

Published: Oct. 18, 2023

The limited availability of freshwater in renewable energy-rich areas has led to the exploration seawater electrolysis for green hydrogen production. However, complex composition presents substantial challenges such as electrode corrosion and electrolyzer failure, calling into question technological economic feasibility direct splitting. Despite many efforts, a comprehensive overview analysis electrolysis, including electrochemical fundamentals, materials, technologies recent breakthroughs, is still lacking. In this review, we systematically examine advances electrocatalytic splitting critically evaluate obstacles optimizing water supply, devices stable production from seawater. We demonstrate that robust materials innovative technologies, especially selective catalysts high-performance devices, are critical efficient electrolysis. then outline discuss future directions could advance techno-economic emerging field, providing roadmap toward design commercialization can enable efficient, cost-effective, sustainable

Language: Английский

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Electrocatalytic seawater splitting: Nice designs, advanced strategies, challenges and perspectives

Materials Today, Journal Year: 2023, Volume and Issue: 69, P. 193 - 235

Published: Sept. 19, 2023

Language: Английский

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Carbon Oxyanion Self‐Transformation on NiFe Oxalates Enables Long‐Term Ampere‐Level Current Density Seawater Oxidation

Angewandte Chemie International Edition, Journal Year: 2023, Volume and Issue: 63(1)

Published: Nov. 23, 2023

Seawater electrolysis is an attractive way of making H2 in coastal areas, and NiFe-based materials are among the top options for alkaline seawater oxidation (ASO). However, ample Cl- can severely corrode catalytic sites lead to limited lifespans. Herein, we report that situ carbon oxyanion self-transformation (COST) from oxalate carbonate on a monolithic NiFe micropillar electrode allows safeguard high-valence metal reaction ASO. In situ/ex studies show spontaneous, timely, appropriate COST safeguards active against attack during ASO even at ampere-level current density (j). Our catalyst shows efficient stable performance, which requires overpotential as low 349 mV attain j 1 A cm-2 . Moreover, with protective surface CO32- exhibits slight activity degradation after 600 h under seawater. This work reports effective design concepts level self-transformation, acting momentous step toward defending seawater-to-H2 conversion systems.

Language: Английский

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Advancements in hydrogen production, storage, distribution and refuelling for a sustainable transport sector: Hydrogen fuel cell vehicles

International Journal of Hydrogen Energy, Journal Year: 2023, Volume and Issue: 52, P. 973 - 1004

Published: Aug. 8, 2023

Hydrogen is considered as a promising fuel in the 21st century due to zero tailpipe CO2 emissions from hydrogen-powered vehicles. The use of hydrogen vehicles can play an important role decarbonising transport sector and achieving net-zero targets. However, there exist several issues related production, efficient storage system refuelling infrastructure, where current research focussing on. This study critically reviews analyses recent technological advancements distribution technologies along with their cost associated greenhouse gas emissions. paper also comprehensively discusses methods, identifies fast explores control strategies. Additionally, it explains various standard protocols relation safe refuelling, economic aspects presents infrastructure. suggests that production significantly varies one technology others. fossil sources using most established were estimated at about $0.8–$3.5/kg H2, depending on country production. underground exhibited lowest cost, followed by compressed liquid storage. levelised station was reported be $1.5–$8/kg station's capacity country. Using portable stations identified option many countries for small fleet size low-to-medium duty Following progresses, this end knowledge gaps thereby future directions.

Language: Английский

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Unraveling the Synergistic Mechanism of Bi‐Functional Nickel–Iron Phosphides Catalysts for Overall Water Splitting

Advanced Functional Materials, Journal Year: 2023, Volume and Issue: 33(33)

Published: April 27, 2023

Abstract Ni–Fe bimetallic electrocatalysts are expected to replace existing precious metal catalysts for water splitting and achieve industrial applications due their high intrinsic activity low cost. However, the mechanism by which Ni Fe species synergistically enhance catalytic remains obscure, still needs further in‐depth study. In this study, a highly active bi‐functional electrocatalyst of 2 P/FeP heterostructures is constructed on foam (Ni P/FeP‐FF), clearly illustrating effect oxygen evolution reaction (OER) revealing true phase hydrogen (HER). The P/FeP‐FF only overpotentials 217 42 mV reach 10 mA cm −2 OER HER, respectively, exhibiting superior overall splitting. can elevate strength FeO surface promote formation high‐valence FeOOH during OER, thus enhancing performance. Based first‐principles calculations Raman characterizations, P/Ni(OH) heterojunction evolved from identified as real HER. This study not builds near‐commercial bifunctional splitting, but also provides deep insight synergistic species.

Language: Английский

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Efficient bubble/precipitate traffic enables stable seawater reduction electrocatalysis at industrial-level current densities

Nature Communications, Journal Year: 2024, Volume and Issue: 15(1)

Published: April 5, 2024

Abstract Seawater electroreduction is attractive for future H 2 production and intermittent energy storage, which has been hindered by aggressive Mg 2+ /Ca precipitation at cathodes consequent poor stability. Here we present a vital microscopic bubble/precipitate traffic system (MBPTS) constructing honeycomb-type 3D robust anti-precipitation seawater reduction (SR), massively/uniformly release small-sized bubbles to almost every corner of the cathode repel precipitates without break. Noticeably, optimal with built-in MBPTS not only enables state-of-the-art alkaline SR performance (1000-h stable operation –1 A cm −2 ) but also highly specialized in catalytically splitting natural into greatest ability. Low amounts after prolonged tests under large current densities reflect genuine efficacy our MBPTS. Additionally, flow-type electrolyzer based on stably functions industrially-relevant 500 mA 150 h while unwaveringly sustaining near-100% Faradic efficiency. Note that estimated price (~1.8 US$/kg H2 even cheaper than US Department Energy’s goal (2 ).

Language: Английский

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High‐Performance Alkaline Seawater Electrolysis with Anomalous Chloride Promoted Oxygen Evolution Reaction

Angewandte Chemie International Edition, Journal Year: 2023, Volume and Issue: 62(46)

Published: Sept. 15, 2023

A highly selective and durable oxygen evolution reaction (OER) electrocatalyst is the bottleneck for direct seawater splitting because of side reactions primarily caused by chloride ions (Cl- ). Most studies about OER catalysts in focus on repulsion Cl- to reduce its negative effects. Herein, we demonstrate that absorption specific site a popular electrocatalyst, nickel-iron layered double hydroxide (NiFe LDH), does not have significant impact; rather, it beneficial activity stability enhancement natural seawater. set situ characterization techniques reveals adsorption desired Fe suppresses leaching, creates more OER-active Ni sites, improving catalyst's long-term simultaneously. Therefore, achieve alkaline electrolysis very first time commercial-scale electrolyser (AE, 120 cm2 electrode area) using NiFe LDH anode. The new exhibits reduction electricity consumption 20.7 % compared purified water-based AE commercial catalyst, achieving excellent durability 100 h at 200 mA cm-2 .

Language: Английский

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