Understanding the bifunctional catalytic ability of electrocatalysts for oxygen evolution reaction and urea oxidation Reaction: Recent advances and perspectives

Chemical Engineering Journal, Journal Year: 2023, Volume and Issue: 471, P. 144660 - 144660

Published: July 11, 2023

Language: Английский

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Achieving Efficient Electrocatalytic Oxygen Evolution in Acidic Media on Yttrium Ruthenate Pyrochlore through Cobalt Incorporation

Advanced Functional Materials, Journal Year: 2023, Volume and Issue: 33(20)

Published: Feb. 20, 2023

Abstract The development of electrocatalysts for the oxygen evolution reaction (OER) especially in acidic media remains major challenge that still requires significant advances, both material design and mechanistic exploration. In this study, incorporation cobalt Y 2‐x Co x Ru 2 O 7−δ results an ultrahigh OER activity because charge redistribution at e g orbitals between atoms. Y1. 75 0.25 electrocatalyst exhibits extremely small overpotential 275 mV 0.5 m H SO 4 current density 10 mA cm −2 , which is smaller than parent (360 mV) commercial RuO (286 catalysts. systematic investigation composition related to shows substitution will also bring other effective changes, such as reducing bandgap, creating vacancies, result fast transfer. Meanwhile, strengthening bond hybridization d metal (Y Ru) 2p intrinsically enhance chemical stability. Finally, theoretical calculations indicate reduces through adsorbate mechanism a lattice oxygen‐mediated mechanism.

Language: Английский

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Bicontinuous RuO2 nanoreactors for acidic water oxidation

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

Published: May 9, 2024

Abstract Improving activity and stability of Ruthenium (Ru)-based catalysts in acidic environments is eager to replace more expensive Iridium (Ir)-based materials as practical anode catalyst for proton-exchange membrane water electrolyzers (PEMWEs). Here, a bicontinuous nanoreactor composed multiscale defective RuO 2 nanomonomers (MD-RuO -BN) conceived confirmed by three-dimensional tomograph reconstruction technology. The unique structure provides abundant active sites rapid mass transfer capability through cavity confinement effect. Besides, existing vacancies grain boundaries endow MD-RuO -BN with generous low-coordination Ru atoms weakened Ru-O interaction, inhibiting the oxidation lattice oxygen dissolution high-valence Ru. Consequently, media, electron- micro-structure synchronously optimized achieves hyper (196 mV @ 10 mA cm −2 ) an ultralow degradation rate 1.2 h −1 . A homemade PEMWE using also conveys high splitting performance (1.64 V 1 ). Theoretical calculations in-situ Raman spectra further unveil electronic mechanism processes, rationalizing enhanced synergistic effect defects protected sites.

Language: Английский

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Engineering the Electronic Interaction between Atomically Dispersed Fe and RuO ₂ Attaining High Catalytic Activity and Durability Catalyst for Li‐O ₂ Battery

Advanced Science, Journal Year: 2023, Volume and Issue: 10(9)

Published: Jan. 22, 2023

Abstract It is significant to develop catalysts with high catalytic activity and durability improve the electrochemical performances of lithium‐oxygen batteries (LOBs). While electronic metal‐support interaction (EMSI) between metal atoms support has shown great potential in field. Hence, effectively performance LOBs, atomically dispersed Fe modified RuO 2 nanoparticles are designed be loaded on hierarchical porous carbon shells (Fe SA ‐RuO /HPCS) based EMSI criterion. revealed that Ru‐O‐Fe 1 structure formed surrounding Ru sites through electron interaction, this could act as ultra‐high driving force center oxygen reduction/evolution reaction (ORR/OER). Specifically, enhances kinetics ORR a certain extent, optimizes morphology discharge products by reducing adsorption energy catalyst for O LiO ; while during OER process, not only greatly OER, but also catalyzes efficient decomposition Li favorable transfer active products. LOBs FeSA‐RuO /HPCS cathodes show an ultra‐low over‐potential, capacity superior durability.

Language: Английский

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Stabilizing ruthenium dioxide with cation-anchored sulfate for durable oxygen evolution in proton-exchange membrane water electrolyzers

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

Published: Dec. 7, 2023

Ruthenium dioxide is the most promising alternative to prevailing but expensive iridium-based catalysts for oxygen evolution reaction in proton-exchange membrane water electrolyzers. However, under-coordinated lattice of ruthenium prone over-oxidation, and vacancies are formed at high oxidation potentials under acidic corrosive conditions. Consequently, atoms adjacent oxidized into soluble high-valence derivatives, causing collapse crystal structure leading its poor stability. Here, we report an oxyanion protection strategy prevent formation on surface by forming coordination-saturated oxygen. Combining density functional theory calculations, electrochemical measurements, a suite operando spectroscopies, showcase that barium-anchored sulfate can greatly impede loss extend lifetime ruthenium-based during evolution, while maintaining activity. This work paves new way designing stable active anode toward splitting.

Language: Английский

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Heteroanion induced structural asymmetricity centered on Ru sites switches the rate-determining step of acid water oxidation

Energy & Environmental Science, Journal Year: 2024, Volume and Issue: 17(5), P. 1885 - 1893

Published: Jan. 1, 2024

The intervening Se induces the structural asymmetricity of Ru-S 6 octahedrons and then regulates electronic structure active Ru site, which possesses excellent acid water oxidation performance as an Ir-free catalyst.

Language: Английский

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Exploring the potential Ru-based catalysts for commercial-scale polymer electrolyte membrane water electrolysis: A systematic review

Progress in Materials Science, Journal Year: 2024, Volume and Issue: 145, P. 101294 - 101294

Published: April 5, 2024

Language: Английский

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Cr dopant mediates hydroxyl spillover on RuO2 for high-efficiency proton exchange membrane electrolysis

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

Published: Sept. 9, 2024

Language: Английский

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Revisiting the Ruthenium Oxide-based Water Oxidation Catalysts in Acidic Media: from Amorphous to Crystalline

Nano Energy, Journal Year: 2025, Volume and Issue: unknown, P. 110800 - 110800

Published: Feb. 1, 2025

Language: Английский

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Recent Progress on Structurally Ordered Materials for Electrocatalysis

Advanced Energy Materials, Journal Year: 2021, Volume and Issue: 11(37)

Published: Aug. 25, 2021

Abstract Tuning material properties by modulation of the arrangement atoms is a fundamental and effective strategy in materials science. Structurally long‐range ordered are increasingly finding utility for electrocatalytic applications. Such structures can achieve unique functions that increase activity compared to corresponding electrocatalysts with disordered structure. Effective strategies designing high‐performance based on structurally presented. This review also summarizes recent progress as efficient highlights applications several representative electrochemical reactions, such as, oxygen evolution reaction, reduction hydrogen reaction. The structural features atomic framework superior performance demonstrated advanced characterization techniques (structural identification) measurements (performance evaluations), respectively. Special attention paid establishment structure‐activity relationship highlight advantages Finally, remaining challenges emerging opportunities these related proposed.

Language: Английский

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