Emerging Two-Dimensional Nanomaterials for Electrocatalysis

Chemical Reviews, Journal Year: 2018, Volume and Issue: 118(13), P. 6337 - 6408

Published: March 19, 2018

Over the past few decades, design and development of advanced electrocatalysts for efficient energy conversion technologies have been subjects extensive study. With discovery graphene, two-dimensional (2D) nanomaterials emerged as some most promising candidates heterogeneous due to their unique physical, chemical, electronic properties. Here, we review 2D-nanomaterial-based selected electrocatalytic processes. We first discuss advances in 2D based on different compositions functions followed by specific principles. Following this overview, various processes involved water cycle, carbon nitrogen cycle from fundamental conception functional application. place a significant emphasis engineering strategies influence these intrinsic material performance, such properties adsorption energetics. Finally, feature opportunities challenges ahead electrocatalysts. By considering theoretical calculations, surface characterization, electrochemical tests, describe relationships between structure, energy, apparent activity wide variety with goal providing better understanding emerging at atomic level.

Language: Английский

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Characteristics and performance of two-dimensional materials for electrocatalysis

Nature Catalysis, Journal Year: 2018, Volume and Issue: 1(12), P. 909 - 921

Published: Nov. 21, 2018

Language: Английский

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Recent progress of reinforcement materials: a comprehensive overview of composite materials

Journal of Materials Research and Technology, Journal Year: 2019, Volume and Issue: 8(6), P. 6354 - 6374

Published: Oct. 10, 2019

Emerged in the middle of 20th century, composite materials are now one hotspot research topics modern technology. Their promising characteristics make them suitable for enormous applications industrial field such as aerospace, automotive, construction, sports, bio-medical and many others. These reveal remarkable structural mechanical properties high strength to weight ratio, resistance chemicals, fire, corrosion wear; being economical manufacture. Herein, an overview materials, their characterization, classification main advantages linked physical based on recent studies presented. There, were presented conventional manufacturing techniques applications. It was highlighted tremendous need discovery new generation composites that should incorporate synthetic or natural by implementing efficient processes. In combination matrix reinforcement use constituent compulsory order obtain a complete material degradable environmentally friendly.

Language: Английский

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MXene/Polymer Membranes: Synthesis, Properties, and Emerging Applications

Chemistry of Materials, Journal Year: 2020, Volume and Issue: 32(5), P. 1703 - 1747

Published: Feb. 10, 2020

2D transition metal carbides or nitrides, known as MXenes, are a new family of materials with close to 30 members experimentally synthesized and dozens more theoretically investigated. Because the abundant surface terminations, MXenes have been compounded various by multi-interactions. In addition prevented aggregation oxidation MXene flakes, MXene/polymer membranes exhibit outstanding mechanical, thermal, electrical properties due synergistic effects. However, relatively little is currently about special review on progress synthesis, properties, applications has not reported date. Herein, this Review starts an introduction synthesis MXenes. Then development will be discussed, which aims summarize approaches fabricating their fascinating properties. The focus then turns exciting potential in fields such filtration, electromagnetic interference (EMI) shielding, energy storage devices, wearable electronics, etc. Finally, outlooks perspectives for future challenges prospects provided.

Language: Английский

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Fe-doped mayenite electride composite with 2D reduced Graphene Oxide: As a non-platinum based, highly durable electrocatalyst for Oxygen Reduction Reaction

Scientific Reports, Journal Year: 2019, Volume and Issue: 9(1)

Published: Dec. 24, 2019

Since the last decades, non-precious metal catalysts (NPMC), especially iron based electrocatalysts show sufficient activity, potentially applicant in oxygen reduction reaction (ORR), however they only withstand considerable current densities at low operating potentials. On other hand are not stable elevated cathode potentials, which is essential for high energy competence, and its remains difficult to deal. Therefore, via this research a simple approach demonstrated that allows synthesis of nanosize Fe-doped mayenite electride, [Ca24Al28O64]4+·(e-)4 (can also write as, C12A7-xFex:e-, where doping level, x = 1) (thereafter, C12A7:e-), consist abundantly available elements with gram level powder material production, on citrate sol-gel method. The maximum achieved conductivity first time synthesized C12A7:e- composite materials was 249 S/cm. Consequently, cost-effective, more active highly durable precious-metal free electrocatalyst, 1.03 V onset potential, 0.89 (RHE) half-wave ~5.9 mA/cm2 density, higher than benchmark 20% Pt/C (5.65 mA/cm2, 0.84 V). has selectivity desired 4e- pathway, 20 wt% electrode immunity towards methanol poisoning. loses almost zero original activity after passing 11 h compared absence case, indicates introduce negligible consequence ORR performance, makes it desirable, electrocatalyst ORR. This primarily described due coexistence related sites reduced graphene oxide (rGO) pyridinic-nitrogen, their strong coupling along porous morphology textures. These textures assist rapid diffusion molecules catalyst quickly. In real system power reached 243 275 mW/cm2 composite, respectively.

Language: Английский

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Applications of Phosphorene and Black Phosphorus in Energy Conversion and Storage Devices

Advanced Energy Materials, Journal Year: 2017, Volume and Issue: 8(8)

Published: Dec. 1, 2017

Abstract The successful isolation of phosphorene (atomic layer thick black phosphorus) in 2014 has currently aroused the interest 2D material researchers. In this review, first, fundamentals phosphorus allotropes, phosphorene, and phosphorus, are briefly introduced, along with their structures, properties, synthesis methods. Second, readers presented an overview energy applications. Particularly electrochemical storage, large interlayer spacing (0.53 nm) allows intercalation/deintercalation larger ions as compared to its graphene counterpart. Therefore, may possess greater potential for high performance. addition, status lithium ion batteries well secondary sodium is reviewed. Next, each application generation, conversion, storage described detail milestones challenges. These emerging applications include supercapacitors, photovoltaic devices, water splitting, photocatalytic hydrogenation, oxygen evolution, thermoelectric generators. Finally fast‐growing dynamic field research summarized perspectives on future possibilities calling efforts chemists, physicists, scientists

Language: Английский

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Recent advances in two-dimensional-material-based sensing technology toward health and environmental monitoring applications

Nanoscale, Journal Year: 2020, Volume and Issue: 12(6), P. 3535 - 3559

Published: Jan. 1, 2020

Low dimensional materials based sensors have improved the detection strategy for sensing complex substances present in environment and human body.

Language: Английский

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Recent Progress of Two-Dimensional Thermoelectric Materials

Nano-Micro Letters, Journal Year: 2020, Volume and Issue: 12(1)

Published: Jan. 23, 2020

Abstract Thermoelectric generators have attracted a wide research interest owing to their ability directly convert heat into electrical power. Moreover, the thermoelectric properties of traditional inorganic and organic materials been significantly improved over past few decades. Among these compounds, layered two-dimensional (2D) materials, such as graphene, black phosphorus, transition metal dichalcogenides, IVA–VIA MXenes, generated large attention group potentially high-performance materials. Due unique electronic, mechanical, thermal, optoelectronic properties, devices based on can be applied in variety applications. Herein, comprehensive review development 2D for applications, well theoretical simulations experimental preparation, is presented. In addition, nanodevice new applications are also introduced. At last, current challenges discussed several prospects this field proposed.

Language: Английский

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Self‐Powered Photodetectors Based on 2D Materials

Advanced Optical Materials, Journal Year: 2019, Volume and Issue: 8(1)

Published: Sept. 24, 2019

Abstract Self‐powered photodetectors are considered as a new type of enabling self‐powered photodetection without external power. The excellent photoresponsivity, fast photoresponse rate, low dark current, and large light on/off ratio these have attracted wide interest among scholars. 2D materials widely used in due to their optical electrical properties, unique structures, capabilities exhibit performance. According the self‐driving mechanism material‐based photodetectors, they divided into three categories: p–n junction Schottky photoelectrochemical photodetectors. From perspectives, research progress is summarized detail here. Research reports indicate that behavior, good characteristics, wideband spectral response ranges. performance facilitates potential applications field optoelectronic devices. In particular, great novel emerging self‐driven Finally, directions for further development anticipated.

Language: Английский

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Degradation Chemistry and Stabilization of Exfoliated Few-Layer Black Phosphorus in Water

Journal of the American Chemical Society, Journal Year: 2018, Volume and Issue: 140(24), P. 7561 - 7567

Published: March 25, 2018

Exfoliated black phosphorus (BP), as a monolayer or few-layer material, has attracted tremendous attention owing to its unique physical properties for applications ranging from optoelectronics photocatalytic hydrogen production. Approaching intrinsic been, however, challenged by chemical reactions and structure degradation of BP under ambient conditions. Surface passivation capping agents been proposed extend the processing time window, yet contamination damage rise challenges applications. Here, we report experiments combined with first-principle calculations that address chemistry BP. Our results show reacts oxygen in water even without light illumination. The reaction follows pseudo-first-order parallel kinetics, produces PO23–, PO33–, PO43– rate constants 0.019, 0.034, 0.023 per day, respectively, occurs preferentially P atoms locating at edges, which yields structural decay nanoflake edges water. In addition, negligible ratio (0.9 ± 0.3 mol %) preserved activity are observed after storage deoxygenated 15 days surface light. reveal provide practical approach exfoliation, delivery, application

Language: Английский

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