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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Precision and correctness in the evaluation of electrocatalytic water splitting: revisiting activity parameters with a critical assessment

Energy & Environmental Science, Journal Year: 2018, Volume and Issue: 11(4), P. 744 - 771

Published: Jan. 1, 2018

To avoid unnoticed errors made by researchers who are working in the area of nanostructured materials for water splitting, correct and precise use evaluation parameters is discussed detail, stating their acceptability validity.

Language: Английский

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Nanoarchitectonics for Transition‐Metal‐Sulfide‐Based Electrocatalysts for Water Splitting

Advanced Materials, Journal Year: 2019, Volume and Issue: 31(17)

Published: Feb. 21, 2019

Abstract Heterogenous electrocatalysts based on transition metal sulfides (TMS) are being actively explored in renewable energy research because nanostructured forms support high intrinsic activities for both the hydrogen evolution reaction (HER) and oxygen (OER). Herein, it is described how researchers working to improve performance of TMS‐based materials by manipulating their internal external nanoarchitectures. A general introduction water‐splitting initially provided explain most important parameters accessing catalytic nanomaterials catalysts. Later, synthetic methods used prepare explained order delve into various strategies achieve higher electrocatalytic HER. Complementary can be increase OER TMS, resulting bifunctional HER OER. Finally, current challenges future opportunities TMS context water splitting summarized. The aim herein provide insights gathered process studying describe valuable guidelines engineering other kinds nanomaterial catalysts conversion storage technologies.

Language: Английский

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Semiconductor polymeric graphitic carbon nitride photocatalysts: the “holy grail” for the photocatalytic hydrogen evolution reaction under visible light

Energy & Environmental Science, Journal Year: 2019, Volume and Issue: 12(7), P. 2080 - 2147

Published: Jan. 1, 2019

Graphitic carbon nitrides and their composites with various morphologies bandgaps engineered for the hydrogen evolution reaction under visible light are reviewed.

Language: Английский

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Bifunctional Heterostructure Assembly of NiFe LDH Nanosheets on NiCoP Nanowires for Highly Efficient and Stable Overall Water Splitting

Advanced Functional Materials, Journal Year: 2018, Volume and Issue: 28(14)

Published: Jan. 31, 2018

Abstract 3D hierarchical heterostructure NiFe LDH@NiCoP/NF electrodes are prepared successfully on nickel foam with special interface engineering and synergistic effects. This research finds that the as‐prepared have a more sophisticated inner structure intensive than simple physical mixture. The require an overpotential as low 120 220 mV to deliver 10 mA cm −2 for hydrogen evolution reaction (HER) oxygen (OER) in 1 m KOH, respectively. Tafel electrochemical impedance spectroscopy further reveal favorable kinetic during electrolysis. Specifically, simultaneously used cathode anode overall water splitting, which requires cell voltage of 1.57 V at . Furthermore, effect improves structural stability promotes generation active phases HER OER, resulting excellent over 100 h continuous operation. Moreover, strategy introduced can also be prepare other bifunctional cost‐efficient electrocatalysts various applications.

Language: Английский

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Hierarchical Nanoassembly of MoS₂/Co₉S₈/Ni₃S₂/Ni as a Highly Efficient Electrocatalyst for Overall Water Splitting in a Wide pH Range

Journal of the American Chemical Society, Journal Year: 2019, Volume and Issue: 141(26), P. 10417 - 10430

Published: June 6, 2019

The design of low-cost yet high-efficiency electrocatalysts for hydrogen evolution reaction (HER) and oxygen (OER) over a wide pH range is highly challenging. We now report hierarchical co-assembly interacting MoS2 Co9S8 nanosheets attached on Ni3S2 nanorod arrays which are supported nickel foam (NF). This tiered structure endows high performance toward HER OER very broad range. By adjusting the molar ratio Co:Mo precursors, we have created CoMoNiS-NF- xy composites ( x: y means ratios ranging from 5:1 to 1:3) with controllable morphology composition. three-dimensional an abundance active sites capable universal catalytic activity. CoMoNiS-NF-31 demonstrates best electrocatalytic activity, giving ultralow overpotentials (113, 103, 117 mV 166, 228, 405 OER) achieve current density 10 mA cm-2 in alkaline, acidic, neutral electrolytes, respectively. It also shows remarkable balance between activity stability. Based distinguished OER, demonstrate two-electrode electrolyzer performing water electrolysis range, low cell voltages 1.54, 1.45, 1.80 V at media, First-principles calculations suggest that arises electron transfer interface, alters binding energies adsorbed species decreases overpotentials. Our results metal sulfides can serve as efficient all-pH (pH = 0-14) overall splitting.

Language: Английский

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Single Atoms and Clusters Based Nanomaterials for Hydrogen Evolution, Oxygen Evolution Reactions, and Full Water Splitting

Advanced Energy Materials, Journal Year: 2019, Volume and Issue: 9(22)

Published: May 2, 2019

Abstract The sustainable and scalable production of hydrogen through evolution reaction (HER) oxygen (OER) in water splitting demands efficient robust electrocatalysts. Currently, state‐of‐the‐art electrocatalysts Pt IrO 2 /RuO exhibit the benchmark catalytic activity toward HER OER, respectively. However, expanding their practical application is hindered by exorbitant price scarcity. Therefore, development alternative effective for crucial. In last few decades, substantial effort has been devoted to HER/OER catalysts based on various transition metals (including Fe, Co, Ni, Mo, atomic Pt) which show promising activities durability. this review, after a brief introduction basic mechanism HER/OER, authors systematically discuss recent progress design, synthesis, single atom cluster‐based catalysts. Moreover, crucial factors that can tune such as morphology, crystal defects, hybridization with nonmetals, heteroatom doping, alloying, formation inside graphitic layered materials are discussed. Finally, existing challenges future perspectives improving performance addressed.

Language: Английский

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Structural Design and Electronic Modulation of Transition‐Metal‐Carbide Electrocatalysts toward Efficient Hydrogen Evolution

Advanced Materials, Journal Year: 2018, Volume and Issue: 31(2)

Published: Aug. 21, 2018

As the key of hydrogen economy, electrocatalytic evolution reactions (HERs) depend on availability cost-efficient electrocatalysts. Over past years, there is a rapid rise in noble-metal-free Among them, transition metal carbides (TMCs) are highlighted due to their structural and electronic merits, e.g., high conductivity, metallic band states, tunable surface/bulk architectures, etc. Herein, representative efforts progress made TMCs comprehensively reviewed, focusing noble-metal-like configuration relevant structural/electronic modulation. Briefly, specific nanostructures carbon-based hybrids introduced increase active-site abundance promote mass transportation, heteroatom doping heterointerface engineering encouraged optimize chemical configurations active sites toward intrinsically boosted HER kinetics. Finally, perspective future development TMC electrocatalysts offered. The overall aim shed some light exploration emerging materials energy chemistry.

Language: Английский

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3D Nitrogen‐Anion‐Decorated Nickel Sulfides for Highly Efficient Overall Water Splitting

Advanced Materials, Journal Year: 2017, Volume and Issue: 29(30)

Published: June 9, 2017

Developing non‐noble‐metal electrocatalysts with high activity and low cost for both the oxygen evolution reaction (OER) hydrogen (HER) is of paramount importance improving generation H 2 fuel by electrocatalytic water‐splitting. This study puts forward a new N‐anion‐decorated Ni 3 S material synthesized simple one‐step calcination route, acting as superior bifunctional electrocatalyst OER/HER first time. The introduction N anions significantly modifies morphology electronic structure , bringing surface active sites exposure, enhanced electrical conductivity, optimal HER Gibbs free‐energy (ΔG H* ), water adsorption energy change H2O* ). Remarkably, obtained N‐Ni /NF 3D electrode exhibits extremely overpotentials 330 110 mV to reach current density 100 10 mA cm −2 OER in 1.0 m KOH, respectively. Moreover, an overall water‐splitting device comprising this delivers at very cell voltage 1.48 V. Our finding introduces way design advanced catalysts splitting.

Language: Английский

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Anion‐Modulated HER and OER Activities of 3D Ni–V‐Based Interstitial Compound Heterojunctions for High‐Efficiency and Stable Overall Water Splitting

Advanced Materials, Journal Year: 2019, Volume and Issue: 31(23)

Published: April 16, 2019

Overall water splitting driven by a low voltage is crucial for practical H2 evolution, but it challenging. Herein, anion-modulation of 3D Ni-V-based transition metal interstitial compound (TMIC) heterojunctions supported on nickel foam (Ni3 N-VN/NF and Ni2 P-VP2 /NF) as coupled hydrogen evolution reaction (HER) oxygen (OER) catalysts efficient overall demonstrated. The heterointerface in Ni3 N-VN has suitable H* absorption energy, being favorable enhancing HER activity with onset overpotential (ηonset ) zero Tafel slope 37 mV dec-1 1 m KOH (close to that Pt/C/NF). For the OER, synergy oxide species can give enhanced ηonset 220 49 . good ascribed activating intermediates, conductivity TMICs electron-transfer, porous structure facilitation mass-transport. Additionally, minimal mutual influence /NF allows easy coupling driving (≥1.43 V), 1.51 V at 10 mA cm-2 , remarkable durability 100 h. It be solar cell (1.5 indicating its potential store intermittent energy.

Language: Английский

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