Principles of Water Electrolysis and Recent Progress in Cobalt‐, Nickel‐, and Iron‐Based Oxides for the Oxygen Evolution Reaction

Angewandte Chemie International Edition, Journal Year: 2021, Volume and Issue: 61(1)

Published: June 17, 2021

Water electrolysis that results in green hydrogen is the key process towards a circular economy. The supply of sustainable electricity and availability oxygen evolution reaction (OER) electrocatalysts are main bottlenecks for large-scale production hydrogen. A broad range OER have been explored to decrease overpotential boost kinetics this sluggish half-reaction. Co-, Ni-, Fe-based catalysts considered be potential candidates replace noble metals due their tunable 3d electron configuration spin state, versatility terms crystal electronic structures, as well abundance nature. This Review provides some basic principles water electrolysis, aspects OER, significant criteria development catalysts. It also insights on recent advances oxides brief perspective challenges electrolysis.

Language: Английский

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Clusters Induced Electron Redistribution to Tune Oxygen Reduction Activity of Transition Metal Single‐Atom for Metal–Air Batteries

Angewandte Chemie International Edition, Journal Year: 2021, Volume and Issue: 61(12)

Published: Dec. 27, 2021

Oxygen reduction reaction (ORR) activity can be effectively tuned by modulating the electron configuration and optimizing chemical bonds. Herein, a general strategy to optimize of metal single-atoms is achieved decoration clusters via coating-pyrolysis-etching route. In this unique structure, are able induce redistribution modulate M-N species bond lengths. As result, M-ACSA@NC exhibits superior ORR compared with nanoparticle-decorated counterparts. The performance enhancement attributed optimized intermediates desorption benefiting from electronic configuration. Theoretical analysis reinforces significant roles correlating cluster-induced charge transfer. proof-of-concept, various metal-air batteries assembled Fe-ACSA@NC deliver remarkable power densities capacities. This an effective universal technique for modulation M-N-C, which shows great potential in application energy storage devices.

Language: Английский

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Schottky Heterojunction Nanosheet Array Achieving High‐Current‐Density Oxygen Evolution for Industrial Water Splitting Electrolyzers

Advanced Energy Materials, Journal Year: 2021, Volume and Issue: 11(46)

Published: Oct. 24, 2021

Abstract Versatile catalyst systems with large current density under industrial conditions are pivotal to give impetus hydrogen energy from fundamental practical applications. Herein, a Schottky heterojunction nanosheet array composed of dispersed NiFe hydroxide nanoparticles and ultrathin NiS nanosheets (NiFe LDH/NiS) is proposed regulate cooperatively mass transport electronic structure for triggering oxygen evolution reaction (OER) activity at high current. In catalytic systems, the rich porosity contributes abundant sites good infiltration electrolyte fast transfer. Furthermore, theoretical calculations reveal coupling LDH onto could tune d‐band center Ni(Fe) atoms binding strength intermediates favorable OER kinetics. Therefore, LDH/NiS exhibits remarkable activity, delivering 1000 mA cm –2 ultralow overpotential 325 mV. Meanwhile, scaled‐up electrodes implemented in an water splitting electrolyzer exhibit stable cell voltage 2.01 V deliver constant 8000 over 80 h, saving 0.215 kWh electricity generate more per cubic meter than commercial Raney Ni electrodes.

Language: Английский

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Vertically-interlaced NiFeP/MXene electrocatalyst with tunable electronic structure for high-efficiency oxygen evolution reaction

Science Bulletin, Journal Year: 2021, Volume and Issue: 66(11), P. 1063 - 1072

Published: March 2, 2021

Language: Английский

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Nanostructured metal phosphides: from controllable synthesis to sustainable catalysis

Chemical Society Reviews, Journal Year: 2021, Volume and Issue: 50(13), P. 7539 - 7586

Published: Jan. 1, 2021

Metal phosphides (MPs) with unique and desirable physicochemical properties provide promising potential in implementable sustainable catalytic fields including electrocatalysis, photocatalysis, mild thermocatalysis, interdisciplinary hybrid systems.

Language: Английский

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Local spin-state tuning of cobalt–iron selenide nanoframes for the boosted oxygen evolution

Energy & Environmental Science, Journal Year: 2020, Volume and Issue: 14(1), P. 365 - 373

Published: Dec. 23, 2020

Tuning local spin state of Co centres by Fe doping in cobalt–iron selenides is effective for boosting oxygen evolution.

Language: Английский

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S-doped nickel-iron hydroxides synthesized by room-temperature electrochemical activation for efficient oxygen evolution

Applied Catalysis B Environment and Energy, Journal Year: 2021, Volume and Issue: 292, P. 120150 - 120150

Published: March 18, 2021

Language: Английский

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Corrosion Engineering on Iron Foam toward Efficiently Electrocatalytic Overall Water Splitting Powered by Sustainable Energy

Advanced Functional Materials, Journal Year: 2021, Volume and Issue: 31(17)

Published: Feb. 24, 2021

Abstract Exploiting highly effective and low‐cost electrocatalysts for the hydrogen evolution reaction (HER) is a pressing challenge development of sustainable energy. In this work, facile industrially compatible one‐pot corrosion strategy rapid synthesis amorphous RuO 2 ‐decorated FeOOH nanosheets on iron foam (FFNaRu) within 1 h reported. Corrosion common inevitable phenomenon that occurs metal surfaces without electricity input, high temperature, tedious synthetic procedures. The FFNaRu electrode superhydrophilic aerophobic, which guarantees intimate contact with electrolyte accelerates instantaneous escape produced gas bubbles during electrocatalytic process. Moreover, strong electronic interactions between promote process via dramatically improving electrochemical interfacial properties. Thus, electrocatalyst presents excellent catalytic activity towards HER (30 mV at 10 mA cm –2 ) overall water‐splitting (230 in M KOH. could be simply powered by intermittent sunlight, wind, thermal energies motivated Stirling engine. Density functional theory calculations confirm coupling effects are also responsible promoting performance.

Language: Английский

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Engineering 2D Photocatalysts toward Carbon Dioxide Reduction

Advanced Energy Materials, Journal Year: 2021, Volume and Issue: 11(8)

Published: Jan. 15, 2021

Abstract As a way to drive chemical reactions by renewable solar energy, photocatalytic technology is an appealing strategy for carbon recycle and value‐added CO 2 utilization mimicking the natural photosynthetic system remedy energy environmental problems. During recent decades of exploration, extensive research has been reported on 2D nanomaterials in reduction because their unique structural properties. This review highlights ongoing development modification strategies from viewpoints defect engineering, surface modification, hybrid construction, following sequence inside‐to‐outside design photocatalysts. These methodologies can expand scope light absorption, promote separation photogenerated charge carriers, enhance adsorption activation , thus effectively improve efficiency. The future challenges opportunities developing modified photocatalysts are also discussed. It hoped that this provide useful guidelines toward further nanocatalysis conversion.

Language: Английский

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V2C MXene synergistically coupling FeNi LDH nanosheets for boosting oxygen evolution reaction

Applied Catalysis B Environment and Energy, Journal Year: 2021, Volume and Issue: 297, P. 120474 - 120474

Published: June 23, 2021

Language: Английский

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