Composition-optimized manganese phosphide nanoparticles anchored on porous carbon network for efficiently electrocatalytic hydrogen evolution

Chemical Engineering Journal, Год журнала: 2023, Номер 469, С. 143879 - 143879

Опубликована: Июнь 2, 2023

Язык: Английский

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Ir Nanoparticles Anchored on Metal‐Organic Frameworks for Efficient Overall Water Splitting under pH‐Universal Conditions

Angewandte Chemie, Год журнала: 2023, Номер 135(17)

Опубликована: Март 2, 2023

Abstract The construction of high‐activity and low‐cost electrocatalysts is critical for efficient hydrogen production by water electrolysis. Herein, we developed an advanced electrocatalyst anchoring well‐dispersed Ir nanoparticles on nickel metal‐organic framework (MOF) Ni‐NDC (NDC: 2,6‐naphthalenedicarboxylic) nanosheets. Benefiting from the strong synergy between MOF through interfacial Ni−O−Ir bonds, synthesized Ir@Ni‐NDC showed exceptional electrocatalytic performance evolution reaction (HER), oxygen (OER) overall splitting in a wide pH range, superior to commercial benchmarks most reported electrocatalysts. Theoretical calculations revealed that charge redistribution bridge induced optimization H 2 O, OH* H* adsorption, thus leading accelerated electrochemical kinetics HER OER. This work provides new clue exploit bifunctional pH‐universal splitting.

Язык: Английский

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Dual roles of sub-nanometer NiO in alkaline hydrogen evolution reaction: breaking the Volmer limitation and optimizing d-orbital electronic configuration

Materials Horizons, Год журнала: 2023, Номер 10(8), С. 2913 - 2920

Опубликована: Янв. 1, 2023

Pt-based nanoclusters toward the hydrogen evolution reaction (HER) remain most promising electrocatalysts. However, sluggish alkaline Volmer-step kinetics and high-cost have hampered progress in developing high-performance HER catalysts. Herein, we propose to construct sub-nanometer NiO tune d-orbital electronic structure of nanocluster-level Pt for breaking limitation reducing Pt-loading. Theoretical simulations firstly suggest that electron transfer from could downshift Ed-band result well-optimized adsorption/desorption strength intermediate (H*), therefore accelerating generation rate. confined into inherent pores N-doped carbon derived ZIF-8 (Pt/NiO/NPC) were designed realize computational prediction boost evolution. The optimal 1.5%Pt/NiO/NPC exhibited an excellent performance stability with a low Tafel slope (only 22.5 mv dec-1) overpotential 25.2 mV at 10 mA cm-2. Importantly, possesses mass activity 17.37 A mg-1 20 mV, over 54 times higher than benchmark wt% Pt/C. Furthermore, DFT calculations illustrate be accelerated owing high OH- attraction nanoclusters, leading exhibiting balance H* adsorption desorption (ΔGH* = -0.082 eV). Our findings provide new insights water dissociation limit catalysts by coupling metal oxide.

Язык: Английский

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A Highly Active and Durable Hierarchical Electrocatalyst for Large-Current-Density Water Splitting

Nano Letters, Год журнала: 2023, Номер 23(19), С. 9087 - 9095

Опубликована: Сен. 25, 2023

Designing bifunctional catalysts with high current densities under industrial circumstances is crucial to propelling hydrogen energy a boost from fundamental practical application. In this work, heterojunction nanowire arrays consisting of manganese oxide and cobalt phosphide (denoted as MnO-CoP/NF) are designed meet the demand by regulating synergic mass transport electronic structure coupling numerous nano-heterogeneous interfaces. The optimal MnO-CoP/NF electrode exhibits remarkable electrocatalytic performance overpotentials 259.5 mV for evolution at large density 1000 mA cm-2 392.2 oxygen 1500 cm-2. Moreover, demonstrates superior durability an ultralow voltage 1.76 V 500 cm-2, outperforming that commercial RuO2||Pt/C electrode. This work sheds light on design metallic heterostructures optimized interfacial structures abundance active sites water splitting applications.

Язык: Английский

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In-situ fabrication of carbon compound NiFeMo-P anchored on nickel foam as bi-functional catalyst for boosting overall water splitting

Deleted Journal, Год журнала: 2023, Номер 2, С. e9120086 - e9120086

Опубликована: Июнь 30, 2023

The efficient non-noble metal-based bifunctional electrocatalyst for hydrogen evolution reaction (HER) and oxygen (OER) has attracted great interest, which is highly significant to enhance the efficiency of production from water electrolysis. Herein, inspired by appropriate adsorption free energy transition metal alloy strong corrosion resistance phosphide in alkaline electrolyte, carbon compound NiFeMo-P anchored on nickel foam (NiFeMo-P-C) obtained simple one-pot hydrothermal subsequent reduction treatment. Remarkably, NiFeMo-P-C exhibits excellent electrocatalytic performances toward HER OER with low overpotentials 87 196 mV at 10 mA·cm^–2, respectively. Moreover, electrolyzer using as both cathode anode only requires a cell voltage 1.50 V reach current density along an outstanding long-term stability 50 h. synergistic effect among alloys phosphide, partially broken hollow morphology porous substrate jointly impart high activity superior durability.

Язык: Английский

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Creating High‐entropy Single Atoms on Transition Disulfides through Substrate‐induced Redox Dynamics for Efficient Electrocatalytic Hydrogen Evolution

Angewandte Chemie International Edition, Год журнала: 2024, Номер 63(32)

Опубликована: Май 16, 2024

The controllable anchoring of multiple metal single-atoms (SAs) into a single support exhibits scientific and technological opportunities, while marrying the concentration-complex multimetallic SAs high-entropy (HESAs) one SAC system remains substantial challenge. Here, we present substrate-mediated formation strategy to successfully fabricate library HESAs on MoS

Язык: Английский

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General Synthesis of Composition‐Tunable High‐Entropy Amorphous Oxides Toward High Efficiency Oxygen Evolution Reaction

Small, Год журнала: 2024, Номер 20(28)

Опубликована: Фев. 5, 2024

Abstract High‐entropy materials have attracted much attention in the electrocatalysis field due to their unique structure, high chemical activity, and compositional tunability. However, harsh complex synthetic methods limit application of such materials. Herein, a universal non‐equilibrium liquid‐phase synthesis strategy is reported prepare high‐entropy amorphous oxide nanoparticles (HEAO‐NPs), composition HEAO‐NPs can be precisely controlled from tri‐ ten‐component. The environment provided by an excessively strong reducing agent overcomes difference reduction potentials various metal ions, resulting formation with nearly equimolar ratio. oxygen evolution reaction (OER) performance further improved adjusting optimizing electronic structure. Fe 16 Co 32 Ni Mn 10 Cu BO y exhibits smaller overpotential (only 259 mV at mA cm −2 ) higher stability OER compared commercial RuO 2 . structure optimized concentration iron makes binding energy CoNi shift direction, promotes generation high‐valence active intermediates, accelerates kinetic process. promising potential catalysis, biology, storage, this work provides general method for composition‐controllable

Язык: Английский

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Transition metal phosphides as noble-metal-alternative co-catalysts for solar hydrogen production

Coordination Chemistry Reviews, Год журнала: 2024, Номер 521, С. 216145 - 216145

Опубликована: Авг. 25, 2024

Язык: Английский

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Electrochemical Synthesis of High-Efficiency Water Electrolysis Catalysts

Electrochemical Energy Reviews, Год журнала: 2025, Номер 8(1)

Опубликована: Фев. 6, 2025

Язык: Английский

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Designing Efficient Non‐Precious Metal Electrocatalysts for High‐Performance Hydrogen Production: A Comprehensive Evaluation Strategy

Small, Год журнала: 2023, Номер 20(14)

Опубликована: Ноя. 21, 2023

Abstract Developing abundant Earth‐element and high‐efficient electrocatalysts for hydrogen production is crucial in effectively reducing the cost of green production. Herein, a strategy by comprehensively considering computational chemical indicators H* adsorption/desorption dehydrogenation kinetics to evaluate evolution performance proposed. Guided proposed strategy, series catalysts are constructed through dual transition metal doping strategy. Density Functional Theory (DFT) calculations experimental chemistry demonstrate that cobalt‐vanadium co‐doped Ni 3 N an exceptionally ideal catalyst from electrolyzed alkaline water. Specifically, Co,V‐Ni requires only 10 41 mV electrolytes seawater, respectively, achieve current density mA cm −2 . Moreover, it can operate steadily at large industrial 500 extended periods. Importantly, this evaluation single‐metal‐doped found still exhibits significant universality. This study not presents efficient non‐precious metal‐based electrocatalyst water/seawater electrolysis but also provides design high‐performance

Язык: Английский

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