Recent advances in proton exchange membrane water electrolysis

Chemical Society Reviews, Journal Year: 2023, Volume and Issue: 52(16), P. 5652 - 5683

Published: Jan. 1, 2023

This review scrutinizes recent progress in PEMWE system including mechanisms, the correlation among structure-composition–performance, manufacturing, design and operation protocols. The challenges perspectives for applications are proposed.

Language: Английский

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S‐Species‐Evoked High‐Valence Ni^2+δ of the Evolved β‐Ni(OH)₂ Electrode for Selective Oxidation of 5‐Hydroxymethylfurfural

Advanced Materials, Journal Year: 2023, Volume and Issue: 35(12)

Published: Jan. 6, 2023

An efficient NiSx -modified β-Ni(OH)2 electrode is reported for the selective oxidation reaction of 5-hydroxymethylfurfural (HMFOR) with excellent electrocatalytic (HMF) selectivity (99.4%), conversion (97.7%), and Faradaic efficiency (98.3%). The decoration will evoke high-valence Ni2+δ species in reconstructed electrode, which are real active HMFOR. generated /Ni(OH)O modulates proton-coupled electron-transfer (PCET) process HMFOR, where electrocatalytically Ni(OH)O can effectively trap protons from CHO end HMF to realize electron transfer. oxygen evolution (OER) competes HMFOR when continues accumulate, generate /NiOx (OH)y intermediate. Density functional theory (DFT) calculations experimental results verify that adsorption energy be optimized through increased composition more capture electrons

Language: Английский

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Review on strategies toward efficient piezocatalysis of BaTiO3 nanomaterials for wastewater treatment through harvesting vibration energy

Nano Energy, Journal Year: 2023, Volume and Issue: 113, P. 108507 - 108507

Published: May 20, 2023

Language: Английский

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Crystal-Phase Engineering in Heterogeneous Catalysis

Chemical Reviews, Journal Year: 2023, Volume and Issue: 124(1), P. 164 - 209

Published: Dec. 4, 2023

The performance of a chemical reaction is critically dependent on the electronic and/or geometric structures material in heterogeneous catalysis. Over past century, Sabatier principle has already provided conceptual framework for optimal catalyst design by adjusting structure catalytic via change composition. Beyond composition, it essential to recognize that atomic catalyst, encompassing terraces, edges, steps, kinks, and corners, have substantial impact activity selectivity reaction. Crystal-phase engineering capacity bring about alterations configurations enabling control over coordination numbers, morphological features, arrangement surface atoms. Modulating crystallographic phase therefore an important strategy improving stability, activity, materials. Nonetheless, complete understanding how depends crystal remains elusive, primarily due absence molecular-level view active sites across various phases. In this review, we focus assessing dependence phases elucidate challenges complexities inherent catalysis, ultimately aiming improved design.

Language: Английский

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Vanadium Redox Flow Battery: Review and Perspective of 3D Electrodes

ACS Nano, Journal Year: 2024, Volume and Issue: 18(29), P. 18852 - 18869

Published: July 12, 2024

Vanadium redox flow battery (VRFB) has garnered significant attention due to its potential for facilitating the cost-effective utilization of renewable energy and large-scale power storage. However, limited electrochemical activity electrode in vanadium reactions poses a challenge achieving high-performance VRFB. Consequently, there is pressing need assess advancements electrodes inspire innovative approaches enhancing structure composition. This work categorizes three-dimensional (3D) derived from materials such as foam, biomass, electrospun fibers. By employing flexible design compositional functionalization, high-speed mass transfer channels abundant active sites can be created. Furthermore, incorporation 3D electrocatalysts into discussed, including metal-based, carbon-based, composite materials. The strong interaction ordered arrangement these nanocomposites have an influence on uniformity stability surface charge distribution, thereby performance electrodes. Finally, challenges perspectives VRFB are explored through electrodes, electrocatalysts, mechanisms. It hoped that this review will development methodology concept VRFB, so promote future scientific storage conversion technology.

Language: Английский

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Single-atom Co dispersed on polyoxometalate derivatives confined in bamboo-like carbon nanotubes enabling efficient dual-site lattice oxygen mediated oxygen evolution electrocatalysis for acidic water electrolyzers

Energy & Environmental Science, Journal Year: 2024, Volume and Issue: 17(9), P. 3088 - 3098

Published: Jan. 1, 2024

In situ generated confined single-atom Co 3+ sites with a low coordination number and abundant oxygen vacancies demonstrate enhanced stability activity for acidic evolution broken scaling relations.

Language: Английский

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Current Status and Perspectives of Dual-Atom Catalysts Towards Sustainable Energy Utilization

Nano-Micro Letters, Journal Year: 2024, Volume and Issue: 16(1)

Published: Feb. 29, 2024

Abstract The exploration of sustainable energy utilization requires the implementation advanced electrochemical devices for efficient conversion and storage, which are enabled by usage cost-effective, high-performance electrocatalysts. Currently, heterogeneous atomically dispersed catalysts considered as potential candidates a wide range applications. Compared to conventional catalysts, metal atoms in carbon-based have more unsaturated coordination sites, quantum size effect, strong metal–support interactions, resulting exceptional catalytic activity. Of these, dual-atomic (DACs) attracted extensive attention due additional synergistic effect between two adjacent atoms. DACs advantages full active site exposure, high selectivity, theoretical 100% atom utilization, ability break scaling relationship adsorption free on sites. In this review, we summarize recent research advancement DACs, includes (1) comprehensive understanding synergy atomic pairs; (2) synthesis DACs; (3) characterization methods, especially aberration-corrected scanning transmission electron microscopy synchrotron spectroscopy; (4) energy-related last part focuses great catalysis small molecules, such oxygen reduction reaction, CO 2 hydrogen evolution N reaction. future challenges opportunities also raised prospective section.

Language: Английский

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Engineering low-coordination atoms on RhPt bimetallene for 12-electron ethanol electrooxidation

Energy & Environmental Science, Journal Year: 2024, Volume and Issue: 17(6), P. 2219 - 2227

Published: Jan. 1, 2024

The three-dimensional perforated RhPt bimetallene achieves a high exposure ratio of low-coordinated diatomic sites, demonstrating excellent activity and remarkable selectivity for 12-electron ethanol oxidation to CO 2 .

Language: Английский

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Advanced Electrocatalyst Supports for Proton Exchange Membrane Water Electrolyzers

ACS Energy Letters, Journal Year: 2024, Volume and Issue: 9(6), P. 2922 - 2935

Published: May 25, 2024

Large-scale adoption of proton exchange membrane water electrolyzers (PEMWEs) is hindered by limited durability costly anodic iridium (Ir) electrocatalysts. Therefore, it crucial to establish a strategy that can decrease the Ir loadings without compromising performance and stability for extended applications PEMWEs. Employing high-surface-area conductive corrosion-resistant catalyst support enhance dispersion low loading, thereby maximizing active site density stabilizing under harsh operating conditions. In this review, we explore role oxygen evolution electrocatalysts summarizing distinct properties various supports such as composition, surface area, conductivity, anticorrosion strong catalyst–support interactions. Finally, articulate our perspectives on future research directions, emphasizing durability, synergy between electrocatalyst scale-up fabrication

Language: Английский

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RhCuBi Trimetallenes with Composition Segregation Coupled Crystalline‐Amorphous Heterostructure Toward Ethanol Electrooxidation

Advanced Energy Materials, Journal Year: 2024, Volume and Issue: 14(21)

Published: Feb. 19, 2024

Abstract The inefficiency of Pt and Pd benchmark catalysts in achieving complete ethanol oxidation, coupled with their inherent susceptibility to poisoning, poses a significant obstacle the advancement direct fuel cells. In this study, development self‐supported ultrathin RhCuBi trimetallenes, demonstrating exceptional performance electrooxidation through segregation interface engineering is presented. distinctive RhBi‐rich crystalline/RhCu‐rich amorphous heterostructure trimetallenes creates wealth highly active interfacial sites for oxidation reaction (EOR). This results an impressive 43.3% Faradaic efficiency C1 pathway peak mass activity 1.11 A mg Rh −1 at 0.68 V versus reversible hydrogen electrode. Moreover, retain 60% initial after 8.5 h constant potential electrolysis, outperforming commercial (<3%). In/ex situ infrared spectroscopy directly reveals generated products key CH 3 CO* intermediates EOR on trimetallenes. Theoretical calculations confirm that RhBi alloy, particularly lattice‐stretched crystalline/amorphous sites, facilitates adsorption/activation dehydrogenation toward EOR. breakthrough offers promising prospects enhancing stability cell applications.

Language: Английский

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