Recent advances in transition metal-based electrocatalysts for alkaline hydrogen evolution

Journal of Materials Chemistry A, Journal Year: 2019, Volume and Issue: 7(25), P. 14971 - 15005

Published: Jan. 1, 2019

Transition metal-based electrocatalysts for alkaline hydrogen evolution reaction.

Language: Английский

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Transition metal-based bimetallic MOFs and MOF-derived catalysts for electrochemical oxygen evolution reaction

Energy & Environmental Science, Journal Year: 2021, Volume and Issue: 14(4), P. 1897 - 1927

Published: Jan. 1, 2021

The review summarizes transition metal-based bimetallic MOFs and their derived materials as electrocatalytic for the OER. mechanisms of OER probed by DFT calculation andin situcharacterization techniques are also discussed.

Language: Английский

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Bifunctional Heterostructured Transition Metal Phosphides for Efficient Electrochemical Water Splitting

Advanced Functional Materials, Journal Year: 2020, Volume and Issue: 30(34)

Published: June 29, 2020

Abstract Reducing green hydrogen production costs is essential for developing a economy. Developing cost‐effective electrocatalysts water electrolysis thus of great research interest. Among various material candidates, transition metal phosphides (TMP) have emerged as robust bifunctional both the evolution reaction (HER) and oxygen (OER) due to their phases tunable electronic structure. Recently, heterostructured catalysts exhibited significantly enhanced activities toward HER/OER. The enhancement can be attributed increased amount accessible active sites, accelerated mass/charge transfer, optimized adsorption intermediates, which arise from synergistic effects heterostructure. Herein, comprehensive overview recent progress TMP‐based heterostructure introduced provide an insight into preparation corresponding mechanisms. It starts with summarizing general fundamental aspects HER/OER effect heterostructures catalytic activity. Next, innovational strategies design construct overall splitting activity, well related mechanisms, are discussed in detail. Finally, summary perspective further opportunities challenges highlighted development points practical application mechanistic studies.

Language: Английский

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Heterogeneous Bimetallic Phosphide Ni₂P‐Fe₂P as an Efficient Bifunctional Catalyst for Water/Seawater Splitting

Advanced Functional Materials, Journal Year: 2020, Volume and Issue: 31(1)

Published: Sept. 28, 2020

Abstract Developing high‐performance and cost‐effective bifunctional electrocatalysts for large‐scale water electrolysis is desirable but remains a significant challenge. Most existing nano‐ micro‐structured require complex synthetic procedures, making scale‐up highly challenging. Here, heterogeneous Ni 2 P‐Fe P microsheet synthesized by directly soaking foam in hydrochloric acid an iron nitrate solution, followed phosphidation. Benefiting from high intrinsic activity, abundant active sites, superior transfer coefficient, this self‐supported electrocatalyst shows superb catalytic activity toward overall splitting, requiring low voltages of 1.682 1.865 V to attain current densities 100 500 mA cm −2 1 m KOH, respectively. Such performance the benchmark IrO || Pt/C pair also places among best catalysts reported thus far. Furthermore, its enhanced corrosion resistance hydrophilic surface make it suitable seawater splitting. It able achieve KOH at 1.811 2.004 V, respectively, which, together with robust durability, demonstrates great potential realistic electrolysis. This work presents general economic approach fabrication metallic phosphide water/seawater electrocatalysis.

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 transition-metal-sulfide-based bifunctional electrocatalysts for overall water splitting

Journal of Materials Chemistry A, Journal Year: 2021, Volume and Issue: 9(9), P. 5320 - 5363

Published: Jan. 1, 2021

This review summarizes recent advances relating to transition metal sulfide (TMS)-based bifunctional electrocatalysts, providing guidelines for the design and fabrication of TMS-based catalysts practical application in water electrolysis.

Language: Английский

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Metal–organic frameworks and their derivatives as electrocatalysts for the oxygen evolution reaction

Chemical Society Reviews, Journal Year: 2021, Volume and Issue: 50(4), P. 2663 - 2695

Published: Jan. 1, 2021

This review summarizes the recent progress on MOFs and their derivatives used for OER electrocatalysis in terms of morphology, composition structure–performance relationship.

Language: Английский

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Single Atom Ruthenium‐Doped CoP/CDs Nanosheets via Splicing of Carbon‐Dots for Robust Hydrogen Production

Angewandte Chemie International Edition, Journal Year: 2021, Volume and Issue: 60(13), P. 7234 - 7244

Published: Jan. 15, 2021

Abstract Ultrathin two‐dimensional catalysts are attracting attention in the field of electrocatalytic hydrogen evolution. This work describe a composite material design which CoP nanoparticles doped with Ru single‐atom sites supported on carbon dots (CDs) single‐layer nanosheets formed by splicing CDs (Ru 1 CoP/CDs). Small CD fragments bore abundant functional groups, analogous to pieces jigsaw puzzle, and could provide high density binding immobilize CoP. The single‐particle‐thick acted as supports, improved conductivity electrocatalyst stability catalyst during operation. CoP/CDs from doping atomic dispersed showed very efficiency for evolution reaction (HER) over wide pH range. prepared under optimized conditions displayed outstanding activity: overpotential HER at current 10 mA cm −2 was low 51 49 mV alkaline acidic conditions, respectively. Density theory calculations that substituted single atoms lowered proton‐coupled electron transfer energy barrier promoted H−H bond formation, thereby enhancing catalytic performance HER. findings open new avenue developing carbon‐based hybridization materials integrated water splitting.

Language: Английский

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Earth-abundant transition-metal-based bifunctional catalysts for overall electrochemical water splitting: A review

Journal of Alloys and Compounds, Journal Year: 2019, Volume and Issue: 819, P. 153346 - 153346

Published: Dec. 16, 2019

Language: Английский

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Oxygen Evolution/Reduction Reaction Catalysts: From In Situ Monitoring and Reaction Mechanisms to Rational Design

Chemical Reviews, Journal Year: 2023, Volume and Issue: 123(9), P. 6257 - 6358

Published: March 21, 2023

The oxygen evolution reaction (OER) and reduction (ORR) are core steps of various energy conversion storage systems. However, their sluggish kinetics, i.e., the demanding multielectron transfer processes, still render OER/ORR catalysts less efficient for practical applications. Moreover, complexity catalyst–electrolyte interface makes a comprehensive understanding intrinsic mechanisms challenging. Fortunately, recent advances in situ/operando characterization techniques have facilitated kinetic monitoring under conditions. Here we provide selected highlights mechanistic studies with main emphasis placed on heterogeneous systems (primarily discussing first-row transition metals which operate basic conditions), followed by brief outlook molecular catalysts. Key sections this review focused determination true active species, identification sites, reactive intermediates. For in-depth insights into above factors, short overview metrics accurate characterizations is provided. A combination obtained time-resolved information reliable activity data will then guide rational design new Strategies such as optimizing restructuring process well overcoming adsorption-energy scaling relations be discussed. Finally, pending current challenges prospects toward development homogeneous presented.

Language: Английский

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