Active hydrogen boosts electrochemical nitrate reduction to ammonia

Nature Communications, Год журнала: 2022, Номер 13(1)

Опубликована: Дек. 27, 2022

Electrochemical nitrate reduction to ammonia is a promising alternative strategy the traditional Haber-Bosch process but suffers from low Faradaic efficiency and limited yield due sluggish multi-electron/proton-involved steps. Herein, we report typical hollow cobalt phosphide nanosphere electrocatalyst assembled on self-supported carbon nanosheet array synthesized with confinement that exhibits an extremely high rate of 8.47 mmol h

Язык: Английский

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Progress in Hydrogen Production Coupled with Electrochemical Oxidation of Small Molecules

Angewandte Chemie International Edition, Год журнала: 2022, Номер 61(51)

Опубликована: Окт. 6, 2022

Abstract The electrochemical oxidation of small molecules to generate value‐added products has gained enormous interest in recent years because the advantages benign operation conditions, high conversion efficiency and selectivity, absence external oxidizing agents, eco‐friendliness. Coupling replace oxygen evolution reaction (OER) at anode hydrogen (HER) cathode an electrolyzer would simultaneously realize generation high‐value chemicals or pollutant degradation highly efficient production hydrogen. This Minireview presents introduction on small‐molecule choice design strategies electrocatalysts as well breakthroughs achieved Finally, challenges future orientations are highlighted.

Язык: Английский

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Electrocatalytic Hydrogenation of 5‐Hydroxymethylfurfural Promoted by a Ru₁Cu Single‐Atom Alloy Catalyst

Angewandte Chemie International Edition, Год журнала: 2022, Номер 61(37)

Опубликована: Июль 25, 2022

Electrochemical reduction of biomass-derived 5-hydroxymethylfurfural (HMF) represents an elegant route toward sustainable value-added chemicals production that circumvents the use fossil fuel and hydrogen. However, reaction efficiency is hampered by high voltage low activity electrodes (Cu, Bi, Pb). Herein, we report a Ru1 Cu single-atom alloy (SAA) catalyst with isolated Ru atoms on nanowires exhibits electrochemical HMF to 2,5-dihydroxymethylfuran (DHMF) promoted productivity (0.47 vs. 0.08 mmol cm-2 h-1 ) faradic (FE) (85.6 71.3 %) at -0.3 V (vs. RHE) compared counterpart. More importantly, FE (87.5 largely retained concentration (100 mM). Kinetic studies using combined techniques suggest disparate mechanisms over Cu, revealing promotes dissociation water produce H* species effectively react via electrocatalytic hydrogenation (ECH) mechanism.

Язык: Английский

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Rational design of porous Ni-Co-Fe ternary metal phosphides nanobricks as bifunctional electrocatalysts for efficient overall water splitting

Applied Catalysis B Environment and Energy, Год журнала: 2022, Номер 310, С. 121353 - 121353

Опубликована: Март 28, 2022

Язык: Английский

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Hydrogen production coupled with water and organic oxidation based on layered double hydroxides

Exploration, Год журнала: 2021, Номер 1(3)

Опубликована: Дек. 1, 2021

Hydrogen production via electrochemical water splitting is one of the most green and promising ways to produce clean energy address resource crisis, but still suffers from low efficiency high cost mainly due sluggish oxygen evolution reaction (OER) process. Alternatively, hydrogen-evolution coupled with alternative oxidation (EHCO) has been proposed as a considerable strategy improve hydrogen combined value-added chemicals. Although these merits, high-efficient electrocatalysts are always needed in practical operation. Typically, layered double hydroxides (LDHs) have developed large class advanced toward both OER EHCO stability. In this review, we summarized latest progress perspectives designing efficient LDHs-based for EHCO. Particularly, influence structure design component regulation on their electrocatalytic process discussed detail. Finally, look forward challenges field organic oxidation, such mechanism, selected well system design, hoping provide certain inspiration development low-cost technology.

Язык: Английский

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Ni(OH)2 nanoparticles encapsulated in conductive nanowire array for high-performance alkaline seawater oxidation

Nano Research, Год журнала: 2022, Номер 15(7), С. 6084 - 6090

Опубликована: Апрель 21, 2022

Язык: Английский

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Bifunctional integrated electrode for high-efficient hydrogen production coupled with 5-hydroxymethylfurfural oxidation

Applied Catalysis B Environment and Energy, Год журнала: 2022, Номер 312, С. 121400 - 121400

Опубликована: Апрель 13, 2022

Язык: Английский

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Innovative Electrochemical Strategies for Hydrogen Production: From Electricity Input to Electricity Output

Angewandte Chemie International Edition, Год журнала: 2022, Номер 62(16)

Опубликована: Ноя. 28, 2022

Renewable H2 production by water electrolysis has attracted much attention due to its numerous advantages. However, the energy consumption of conventional is high and mainly driven kinetically inert anodic oxygen evolution reaction. An alternative approach coupling different half-cell reactions use redox mediators. In this review, we, therefore, summarize latest findings on innovative electrochemical strategies for production. First, we address mediators utilized in splitting, including soluble insoluble species, corresponding cell concepts. Second, discuss involving organic inorganic chemical transformations. Then, at both cathode anode, or even together with electricity generation, presented. Finally, remaining challenges prospects future development research field are highlighted.

Язык: Английский

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Electronic Modulation of Metal–Organic Frameworks by Interfacial Bridging for Efficient pH‐Universal Hydrogen Evolution

Advanced Functional Materials, Год журнала: 2022, Номер 33(1)

Опубликована: Окт. 26, 2022

Abstract Designing well‐defined interfacial chemical bond bridges is an effective strategy to optimize the catalytic activity of metal–organic frameworks (MOFs), but it remains challenging. Herein, a facile in situ growth reported for synthesis tightly connected 2D/2D heterostructures by coupling MXene with CoBDC nanosheets. The multifunctional nanosheets high conductivity and ideal hydrophilicity as bridging carriers can ensure structural stability sufficient exposure active sites. Moreover, Co–O–Ti formed at interface effectively triggers charge transfer modulates electronic structure Co‐active site, which enhances reaction kinetics. As result, optimized CoBDC/MXene exhibits superior hydrogen evolution (HER) low overpotentials 29, 41, 76 mV 10 mA cm −2 alkaline, acidic, neutral electrolytes, respectively, comparable commercial Pt/C. Theoretical calculation demonstrates that bridging‐induced electron redistribution optimizes free energy water dissociation adsorption, resulting improved evolution. This study not only provides novel electrocatalyst efficient HER all pH conditions also opens up new avenue designing highly systems.

Язык: Английский

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Recent Advances on Transition‐Metal‐Based Layered Double Hydroxides Nanosheets for Electrocatalytic Energy Conversion

Advanced Science, Год журнала: 2023, Номер 10(13)

Опубликована: Март 3, 2023

Abstract Transition‐metal‐based layered double hydroxides (TM‐LDHs) nanosheets are promising electrocatalysts in the renewable electrochemical energy conversion system, which regarded as alternatives to noble metal‐based materials. In this review, recent advances on effective and facile strategies rationally design TM‐LDHs electrocatalysts, such increasing number of active sties, improving utilization sites (atomic‐scale catalysts), modulating electron configurations, controlling lattice facets, summarized compared. Then, these fabricated for oxygen evolution reaction, hydrogen urea oxidation nitrogen reduction small molecule oxidations, biomass derivatives upgrading is articulated through systematically discussing corresponding fundamental principles reaction mechanism. Finally, existing challenges density catalytically future prospects nanosheets‐based each application also commented.

Язык: Английский

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