Recent Advances in Electrocatalytic Hydrogen Evolution Using Nanoparticles

Chemical Reviews, Journal Year: 2019, Volume and Issue: 120(2), P. 851 - 918

Published: Oct. 28, 2019

Hydrogen fuel is considered as the cleanest renewable resource and primary alternative to fossil fuels for future energy supply. Sustainable hydrogen generation major prerequisite realize economy. The electrocatalytic evolution reaction (HER), vital step of water electrolysis H2 production, has been subject extensive study over past decades. In this comprehensive review, we first summarize fundamentals HER review recent state-of-the-art advances in low-cost high-performance catalysts based on noble non-noble metals, well metal-free electrocatalysts. We systemically discuss insights into relationship among catalytic activity, morphology, structure, composition, synthetic method. Strategies developing an effective catalyst, including increasing intrinsic activity active sites and/or number sites, are summarized highlighted. Finally, challenges, perspectives, research directions electrocatalysis featured.

Language: Английский

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Clean and Affordable Hydrogen Fuel from Alkaline Water Splitting: Past, Recent Progress, and Future Prospects

Advanced Materials, Journal Year: 2021, Volume and Issue: 33(31)

Published: June 12, 2021

Abstract Hydrogen economy has emerged as a very promising alternative to the current hydrocarbon economy, which involves process of harvesting renewable energy split water into hydrogen and oxygen then further utilization clean fuel. The production by electrolysis is an essential prerequisite with zero carbon emission. Among various technologies, alkaline splitting been commercialized for more than 100 years, representing most mature economic technology. Here, historic development overviewed, several critical electrochemical parameters are discussed. After that, advanced nonprecious metal electrocatalysts that recently negotiating evolution reaction (OER) (HER) discussed, including transition oxides, (oxy)hydroxides, chalcogenides, phosphides, nitrides OER, well alloys, carbides HER. In this section, particular attention paid catalyst synthesis, activity stability challenges, performance improvement, industry‐relevant developments. Some recent works about scaled‐up novel electrode designs, seawater also spotlighted. Finally, outlook on future challenges opportunities offered, potential directions speculated.

Language: Английский

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Engineering single-atomic ruthenium catalytic sites on defective nickel-iron layered double hydroxide for overall water splitting

Nature Communications, Journal Year: 2021, Volume and Issue: 12(1)

Published: July 28, 2021

Abstract Rational design of single atom catalyst is critical for efficient sustainable energy conversion. However, the atomic-level control active sites essential electrocatalytic materials in alkaline electrolyte. Moreover, well-defined surface structures lead to in-depth understanding catalytic mechanisms. Herein, we report a single-atomic-site ruthenium stabilized on defective nickel-iron layered double hydroxide nanosheets (Ru 1 /D-NiFe LDH). Under precise regulation local coordination environments catalytically and existence defects, Ru LDH delivers an ultralow overpotential 18 mV at 10 mA cm −2 hydrogen evolution reaction, surpassing commercial Pt/C catalyst. Density functional theory calculations reveal that optimizes adsorption energies intermediates reaction promotes O–O coupling Ru–O site oxygen reaction. The as ideal model reveals superior water splitting performance with potential development promising water-alkali electrocatalysts.

Language: Английский

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Multifunctional Transition Metal‐Based Phosphides in Energy‐Related Electrocatalysis

Advanced Energy Materials, Journal Year: 2019, Volume and Issue: 10(11)

Published: Sept. 24, 2019

Abstract The exploitation of cheap and efficient electrocatalysts is the key to make energy‐related electrocatalytic techniques commercially viable. In recent years, transition metal phosphides (TMPs) have gained a great deal attention owing their multifunctional active sites, tunable structure, composition, as well unique physicochemical properties. This review summarizes up‐to‐date progress on TMPs in electrocatalysis from diversified synthetic methods, ingenious‐modulated strategies, novel applications. order set forth theory–structure–performance relationships upon TMPs, corresponding reaction mechanisms, electrocatalytsts' structure/composition designs desired electrochemical performance are jointly discussed, along with demonstrating practical applications overall water splitting, metal–air batteries, lithium–sulfur etc. end, some underpinning issues research orientations toward briefly proposed.

Language: Английский

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Recent advances in electrocatalysts for neutral and large-current-density water electrolysis

Nano Energy, Journal Year: 2020, Volume and Issue: 80, P. 105545 - 105545

Published: Oct. 28, 2020

Language: Английский

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Iridium-based nanomaterials for electrochemical water splitting

Nano Energy, Journal Year: 2020, Volume and Issue: 78, P. 105270 - 105270

Published: Aug. 14, 2020

Language: Английский

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Design and application of active sites in g-C3N4-based photocatalysts

Journal of Material Science and Technology, Journal Year: 2020, Volume and Issue: 56, P. 69 - 88

Published: May 11, 2020

Language: Английский

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Metallic Co Nanoarray Catalyzes Selective NH₃ Production from Electrochemical Nitrate Reduction at Current Densities Exceeding 2 A cm⁻²

Advanced Science, Journal Year: 2021, Volume and Issue: 8(7)

Published: Feb. 1, 2021

Abstract Electrochemical nitrate reduction (NITRR) offers a promising alternative toward nitrogen recycling and ammonia production under ambient conditions, for which highly active selective electrocatalyst is desired. In this study, metallic cobalt nanoarrays as facilely prepared from the electrochemical of Co(OH) 2 (NAs) are demonstrated to exhibit unprecedented NH 3 producing capability catalyzing NITRR. Benefitting high intrinsic activity Co 0 , intimate contact between species conductive substrate nanostructure exposes large number sites, Co‐NAs electrode exhibits current density −2.2 A cm −2 rate 10.4 mmol h −1 at −0.24 V versus RHE alkaline condition significantly surpasses reported counterparts. Moreover, close‐to‐unity (≥96%) Faradaic efficiency (FE) achieved over wide application range (potential, NO − concentration pH). Density function theory calculation reveals optimized adsorption energy NITRR intermediates on surface . Furthermore, it proposed that despite sluggish kinetics Volmer step (H O → *H + *OH) provides protons in conventional hydrogenation mechanism, proton‐supplying water dissociation process drastically facilitated following concerted dissociation–hydrogenation pathway.

Language: Английский

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Reconstructed Water Oxidation Electrocatalysts: The Impact of Surface Dynamics on Intrinsic Activities

Advanced Functional Materials, Journal Year: 2020, Volume and Issue: 31(12)

Published: Oct. 29, 2020

Abstract Electroreduction of small molecules such as H 2 O, CO , and N for producing clean fuels or valuable chemicals provides a sustainable approach to meet the increasing global energy demands alleviate concern on climate change resulting from fossil fuel consumption. On path implement this purpose, however, several scientific hurdles remain, one which is low efficiency due sluggish kinetics paired oxygen evolution reaction (OER). In response, it highly desirable synthesize high‐performance cost‐effective OER electrocatalysts. Recent advances have witnessed surface reconstruction engineering salient tool significantly improve catalytic performance review, recent progress reconstructed electrocatalysts future opportunities are discussed. A brief introduction fundamentals experimental approaches generating characterizing active sites in nanocatalysts given first, followed by an expanded discussion with improved activities, particular emphasis understanding correlation between dynamics activities. Finally, prospect communities harnessing reconstruction‐promoted electrochemical water oxidation will be provided.

Language: Английский

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Self-supported bimetallic phosphides with artificial heterointerfaces for enhanced electrochemical water splitting

Applied Catalysis B Environment and Energy, Journal Year: 2021, Volume and Issue: 304, P. 120914 - 120914

Published: Nov. 15, 2021

Language: Английский

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