Selective Hydrogenation over Supported Metal Catalysts: From Nanoparticles to Single Atoms

Chemical Reviews, Год журнала: 2019, Номер 120(2), С. 683 - 733

Опубликована: Сен. 24, 2019

Selective catalytic hydrogenation has wide applications in both petrochemical and fine chemical industries, however, it remains challenging when two or multiple functional groups coexist the substrate. To tackle this challenge, "active site isolation" strategy been proved effective, various approaches to isolation have developed. In review, we summarized these approaches, including adsorption/grafting of N/S-containing organic molecules on metal surface, partial covering active surface by oxides either via doping through strong metal-support interaction, confinement nanoparticles micro- mesopores supports, formation bimetallic alloys intermetallics core@shell structures with a relatively inert (IB IIB) nonmetal element (B, C, S, etc.), construction single-atom catalysts reducible metals. Both advantages disadvantages each approach toward discussed for three types chemoselective reactions, alkynes/dienes monoenes, α,β-unsaturated aldehydes/ketones unsaturated alcohols, substituted nitroarenes corresponding anilines. The key factors affecting activity/selectivity, particular, geometric electronic structure sites, are aim extract fundamental principles development efficient selective as well other transformations.

Язык: Английский

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Metallic nanostructures with low dimensionality for electrochemical water splitting

Chemical Society Reviews, Год журнала: 2020, Номер 49(10), С. 3072 - 3106

Опубликована: Янв. 1, 2020

The recent advances in 1D and 2D metallic nanostructures for electrochemical water splitting (HER OER) are highlighted.

Язык: Английский

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Ultrafast room-temperature synthesis of porous S-doped Ni/Fe (oxy)hydroxide electrodes for oxygen evolution catalysis in seawater splitting

Energy & Environmental Science, Год журнала: 2020, Номер 13(10), С. 3439 - 3446

Опубликована: Янв. 1, 2020

A robust oxygen-evolving electrocatalyst for high-performance seawater splitting was developed using a cost-effective and industrially compatible method.

Язык: Английский

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Defect‐Rich Heterogeneous MoS₂/NiS₂ Nanosheets Electrocatalysts for Efficient Overall Water Splitting

Advanced Science, Год журнала: 2019, Номер 6(14)

Опубликована: Май 20, 2019

Abstract Designing and constructing bifunctional electrocatalysts is vital for water splitting. Particularly, the rational interface engineering can effectively modify active sites promote electronic transfer, leading to improved splitting efficiency. Herein, free‐standing defect‐rich heterogeneous MoS 2 /NiS nanosheets overall are designed. The abundant interfaces in not only provide rich electroactive but also facilitate electron which further cooperate synergistically toward electrocatalytic reactions. Consequently, optimal show enhanced performances as This study may open up a new route rationally maximize their electrochemical performances, help accelerate development of nonprecious

Язык: Английский

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Heteroatom doped graphene engineering for energy storage and conversion

Materials Today, Год журнала: 2020, Номер 39, С. 47 - 65

Опубликована: Май 6, 2020

Язык: Английский

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Interface Engineering of Hierarchical Branched Mo‐Doped Ni₃S₂/Ni_xP_y Hollow Heterostructure Nanorods for Efficient Overall Water Splitting

Advanced Energy Materials, Год журнала: 2020, Номер 10(17)

Опубликована: Март 16, 2020

Abstract Rational design and construction of bifunctional electrocatalysts with excellent activity durability is imperative for water splitting. Herein, a novel top‐down strategy to realize hierarchical branched Mo‐doped sulfide/phosphide heterostructure (Mo‐Ni 3 S 2 /Ni x P y hollow nanorods), by partially phosphating Mo‐Ni /NF flower clusters, proposed. Benefitting from the optimized electronic structure configuration, nanorod structure, abundant heterogeneous interfaces, as‐obtained multisite electrode has remarkable stability electrocatalytic in hydrogen evolution reaction (HER)/oxygen (OER) 1 m KOH solutions. It possesses an extremely low overpotential 238 mV at current density 50 mA cm −2 OER. Importantly, when assembled as anode cathode simultaneously, it merely requires ultralow cell voltage 1.46 V achieve 10 , over 72 h, outperforming most reported Ni‐based materials. Density functional theory results further confirm that doped can synergistically optimize Gibbs free energies H O‐containing intermediates (OH*, O*, OOH*) during HER OER processes, thus accelerating catalytic kinetics electrochemical This work demonstrates importance rational combination metal doping interface engineering advanced

Язык: Английский

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Designing MOF Nanoarchitectures for Electrochemical Water Splitting

Advanced Materials, Год журнала: 2021, Номер 33(17)

Опубликована: Март 22, 2021

Abstract Electrochemical water splitting has attracted significant attention as a key pathway for the development of renewable energy systems. Fabricating efficient electrocatalysts these processes is intensely desired to reduce their overpotentials and facilitate practical applications. Recently, metal–organic framework (MOF) nanoarchitectures featuring ultrahigh surface areas, tunable nanostructures, excellent porosities have emerged promising materials highly active catalysts electrochemical splitting. Herein, most pivotal advances in recent research on engineering MOF are presented. First, design catalytic centers MOF‐based/derived summarized compared from aspects chemical composition optimization structural functionalization at atomic molecular levels. Subsequently, fast‐growing breakthroughs activities, identification sites, fundamental mechanisms thoroughly discussed. Finally, comprehensive commentary current primary challenges future perspectives its commercialization hydrogen production provided. Hereby, new insights into synthetic principles electrocatalysis designing utilization offered, thus further promoting prosperity wide range

Язык: Английский

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Electrochemical Oxidation of 5‐Hydroxymethylfurfural on Nickel Nitride/Carbon Nanosheets: Reaction Pathway Determined by In Situ Sum Frequency Generation Vibrational Spectroscopy

Angewandte Chemie International Edition, Год журнала: 2019, Номер 58(44), С. 15895 - 15903

Опубликована: Авг. 27, 2019

2,5-Furandicarboxylic acid was obtained from the electrooxidation of 5-hydroxymethylfurfural (HMF) with non-noble metal-based catalysts. Moreover, combining biomass oxidation hydrogen evolution reaction (HER) increased energy conversion efficiency an electrolyzer and also generated value-added products at both electrodes. Here, pathway on surface a carbon-coupled nickel nitride nanosheet (Ni3 N@C) electrode evaluated by surface-selective vibrational spectroscopy using sum frequency generation (SFG) during electrochemical oxidation. The Ni3 N@C shows catalytic activities for HMF HER. As first in situ SFG study transition-metal upgrade HMF, this work not only demonstrates that but provides opportunity nonprecious metal nitrides to simultaneously produce H2 under ambient conditions.

Язык: Английский

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Electronic Redistribution: Construction and Modulation of Interface Engineering on CoP for Enhancing Overall Water Splitting

Advanced Functional Materials, Год журнала: 2020, Номер 30(14)

Опубликована: Фев. 20, 2020

Abstract Modulating and constructing interface engineering is an efficient strategy to enhance catalytic activity for water splitting. Herein, a hybrid nanoarray structure of V‐CoP@a‐CeO 2 , where “a” represents amorphous, integrated into carbon cloth fabricated The synergy effect between V CeO can increase the electron density Co atoms at active sites, further optimizing Gibbs free energy H* adsorption (Δ G ). Besides, possesses lower adsorption/dissociation energies, enabling accelerated reaction kinetics in alkaline media. As expected, exhibits superior performance toward hydrogen evolution oxygen reaction. More importantly, two‐electrode electrolyzer combined with electrocatalyst V‐CoP@ a‐CeO only demands that voltages electrolytic cell are 1.56 1.71 achieve current densities 10 100 mA cm −2 respectively. This work provides guidance design or optimization materials electrolysis beyond.

Язык: Английский

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Electrochemical oxidation of biomass derived 5-hydroxymethylfurfural (HMF): pathway, mechanism, catalysts and coupling reactions

Green Chemistry, Год журнала: 2021, Номер 23(12), С. 4228 - 4254

Опубликована: Янв. 1, 2021

HMF electrooxidation is emerging as a powerful and promising method to produce wide range of high-value chemicals on account mild operation conditions, controllable selectivity, scalability.

Язык: Английский

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