Collaborative Interface Optimization Strategy Guided Ultrafine RuCo and MXene Heterostructure Electrocatalysts for Efficient Overall Water Splitting

ACS Nano, Journal Year: 2023, Volume and Issue: 17(11), P. 10947 - 10957

Published: May 18, 2023

Developing highly active and robust electrocatalysts for the hydrogen/oxygen evolution reaction (HER/OER) is crucial large-scale utilization of green hydrogen. In this study, a collaborative interface optimization guided strategy was employed to prepare metal-organic framework (MOF) derived heterostructure electrocatalyst (MXene@RuCo NPs). The obtained requires overpotentials only 20 mV HER 253 OER deliver current density 10 mA/cm2 in alkaline media, respectively, it also exhibits great performance at high density. Experiments theoretical calculations reveal that doped Ru introduces second sites decreases diameter nanoparticles, which greatly enhances number sites. More importantly, MXene/RuCo NPs heterogeneous interfaces catalysts exhibit synergistic effects, decreasing work function catalyst improving charge transfer rate, thus reducing energy barrier catalytic reaction. This represents promising development MOF-derived achieve efficient conversion industrial applications.

Language: Английский

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Unraveling the Synergistic Mechanism of Bi‐Functional Nickel–Iron Phosphides Catalysts for Overall Water Splitting

Advanced Functional Materials, Journal Year: 2023, Volume and Issue: 33(33)

Published: April 27, 2023

Abstract Ni–Fe bimetallic electrocatalysts are expected to replace existing precious metal catalysts for water splitting and achieve industrial applications due their high intrinsic activity low cost. However, the mechanism by which Ni Fe species synergistically enhance catalytic remains obscure, still needs further in‐depth study. In this study, a highly active bi‐functional electrocatalyst of 2 P/FeP heterostructures is constructed on foam (Ni P/FeP‐FF), clearly illustrating effect oxygen evolution reaction (OER) revealing true phase hydrogen (HER). The P/FeP‐FF only overpotentials 217 42 mV reach 10 mA cm −2 OER HER, respectively, exhibiting superior overall splitting. can elevate strength FeO surface promote formation high‐valence FeOOH during OER, thus enhancing performance. Based first‐principles calculations Raman characterizations, P/Ni(OH) heterojunction evolved from identified as real HER. This study not builds near‐commercial bifunctional splitting, but also provides deep insight synergistic species.

Language: Английский

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Modulating Electronic Metal‐Support Interactions to Boost Visible‐Light‐Driven Hydrolysis of Ammonia Borane: Nickel‐Platinum Nanoparticles Supported on Phosphorus‐Doped Titania

Angewandte Chemie International Edition, Journal Year: 2023, Volume and Issue: 62(40)

Published: June 9, 2023

Abstract Ammonia borane (AB) is a promising material for chemical H 2 storage owing to its high density (up 19.6 wt %). However, the development of an efficient catalyst driving evolution through AB hydrolysis remains challenging. Therefore, visible‐light‐driven strategy generating was implemented in this study using Ni−Pt nanoparticles supported on phosphorus‐doped TiO (Ni‐Pt/P‐TiO ) as photocatalysts. Through surface engineering, P‐TiO prepared by phytic‐acid‐assisted phosphorization and then employed ideal support immobilizing via facile co‐reduction strategy. Under visible‐light irradiation at 283 K, Ni 40 Pt 60 /P‐TiO exhibited improved recyclability turnover frequency 967.8 mol −1 min . Characterization experiments functional theory calculations indicated that enhanced performance originated from combination alloying effect, Mott–Schottky junction metal‐semiconductor interface, strong metal‐support interactions. These findings not only underscore benefits utilizing multipronged effects construct highly active AB‐hydrolyzing catalysts, but also pave path toward designing high‐performance catalysts engineering modulate electronic interactions other visible‐light‐induced reactions.

Language: Английский

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Engineering strategies and active site identification of MXene-based catalysts for electrochemical conversion reactions

Chemical Society Reviews, Journal Year: 2023, Volume and Issue: 52(9), P. 3215 - 3264

Published: Jan. 1, 2023

This review summarizes engineering strategies to modify MXene-based catalysts and their active site identification for applications in electrochemical conversion reactions.

Language: Английский

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Recent Advances and Perspectives of Lewis Acidic Etching Route: An Emerging Preparation Strategy for MXenes

Nano-Micro Letters, Journal Year: 2023, Volume and Issue: 15(1)

Published: March 15, 2023

Abstract Since the discovery in 2011, MXenes have become rising star field of two-dimensional materials. Benefiting from metallic-level conductivity, large and adjustable gallery spacing, low ion diffusion barrier, rich surface chemistry, superior mechanical strength, exhibit great application prospects energy storage conversion, sensors, optoelectronics, electromagnetic interference shielding biomedicine. Nevertheless, two issues seriously deteriorate further development MXenes. One is high experimental risk common preparation methods such as HF etching, other difficulty obtaining with controllable groups. Recently, Lewis acidic a brand-new strategy for MXenes, has attracted intensive attention due to its safety ability endow uniform terminations. However, comprehensive review etching method not been reported yet. Herein, we first introduce following four aspects: mechanism, terminations regulation, in-situ formed metals delamination multi-layered Further, applications MXene-based hybrids obtained by route sensors microwave absorption are carefully summarized. Finally, some challenges opportunities also presented.

Language: Английский

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Surface engineering of MXenes for energy and environmental applications

Journal of Materials Chemistry A, Journal Year: 2022, Volume and Issue: 10(19), P. 10265 - 10296

Published: Jan. 1, 2022

This paper reviews the surface engineering, including termination groups, functionalization, defects and oxidation, of MXenes, their impact on energy environmental applications MXenes.

Language: Английский

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Recent advances of MXenes Mo2C-based materials for efficient photocatalytic hydrogen evolution reaction

Carbon letters, Journal Year: 2022, Volume and Issue: 33(5), P. 1381 - 1394

Published: Sept. 18, 2022

Language: Английский

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Why do Single‐Atom Alloys Catalysts Outperform both Single‐Atom Catalysts and Nanocatalysts on MXene?

Angewandte Chemie International Edition, Journal Year: 2023, Volume and Issue: 63(4)

Published: Dec. 1, 2023

Abstract Single‐atom alloys (SAAs), combining the advantages of single‐atom and nanoparticles (NPs), play an extremely significant role in field heterogeneous catalysis. Nevertheless, understanding catalytic mechanism SAAs catalysis reactions remains a challenge compared with single atoms NPs. Herein, ruthenium‐nickel (RuNi ) synthesized by embedding atomically dispersed Ru Ni NPs are anchored on two‐dimensional Ti 3 C 2 T x MXene. The RuNi SAA‐3 −Ti catalysts exhibit unprecedented activity for hydrogen evolution from ammonia borane (AB, NH BH hydrolysis mass‐specific (r mass value 333 L min −1 g . Theoretical calculations reveal that anchoring optimizes dissociation AB H O as well binding ability H* intermediates during due to d‐band structural modulation caused alloying effect metal‐supports interactions (MSI) This work provides useful design principles developing optimizing efficient hydrogen‐related demonstrates over energy

Language: Английский

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Rational design of MXene-MoS2 heterostructure with rapid ion transport rate as an advanced anode for sodium-ion batteries

Chemical Engineering Journal, Journal Year: 2023, Volume and Issue: 457, P. 141363 - 141363

Published: Jan. 6, 2023

Language: Английский

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Recent developments of MXene-based catalysts for hydrogen production by water splitting

Green Chemistry, Journal Year: 2023, Volume and Issue: 25(5), P. 1749 - 1789

Published: Jan. 1, 2023

In the application of electrolytic water splitting, MXenes can achieve performance optimization by doping, surface functional group regulation, construction defect/vacancy, 3D/porous structure, or compounding with other materials.

Language: Английский

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