Recent Advances on Water‐Splitting Electrocatalysis Mediated by Noble‐Metal‐Based Nanostructured Materials

Advanced Energy Materials, Journal Year: 2020, Volume and Issue: 10(11)

Published: Feb. 6, 2020

Abstract Electrochemical water splitting plays a crucial role in the development of clean and renewable energy production conversion, which is promising pathway to reduce social dependence on fossil fuels. Thus, highly active, cost‐efficient, robust catalysts must be developed reaction overpotential increase electrocatalytic efficiency. In this review, recent research efforts toward developing advanced electrocatalysts based noble metals with outstanding performance for catalysis, mainly dependent their structure engineering, are summarized. First, simple description water‐splitting mechanism some engineering strategies given, including heteroatom incorporation, strain interface/hybrid single atomic construction. Then, underlying relationship between metal electronic/geometric discussed assistance theoretical simulation. Finally, personal perspective provided order highlight challenges opportunities novel suitable wide range commercial uses structural applications.

Language: Английский

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Advanced Electrocatalysts with Single-Metal-Atom Active Sites

Chemical Reviews, Journal Year: 2020, Volume and Issue: 120(21), P. 12217 - 12314

Published: Nov. 2, 2020

Electrocatalysts with single metal atoms as active sites have received increasing attention owing to their high atomic utilization efficiency and exotic catalytic activity selectivity. This review aims provide a comprehensive summary on the recent development of such single-atom electrocatalysts (SAECs) for various energy-conversion reactions. The discussion starts an introduction different types SAECs, followed by overview synthetic methodologies control dispersion atomically resolved characterization using state-of-the-art microscopic spectroscopic techniques. In recognition extensive applications electrocatalytic studies are dissected in terms important electrochemical reactions, including hydrogen evolution reaction (HER), oxygen (OER), reduction (ORR), carbon dioxide (CO2RR), nitrogen (NRR). Examples SAECs deliberated each case performance, structure-property relationships, enhancement mechanisms. A perspective is provided at end section about remaining challenges opportunities targeted reaction.

Language: Английский

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Toward Active-Site Tailoring in Heterogeneous Catalysis by Atomically Precise Metal Nanoclusters with Crystallographic Structures

Chemical Reviews, Journal Year: 2020, Volume and Issue: 121(2), P. 567 - 648

Published: Sept. 17, 2020

Heterogeneous catalysis involves solid-state catalysts, among which metal nanoparticles occupy an important position. Unfortunately, no two from conventional synthesis are the same at atomic level, though such regular can be highly uniform nanometer level (e.g., size distribution ∼5%). In long pursuit of well-defined nanocatalysts, a recent success is atomically precise nanoclusters protected by ligands in range tens to hundreds atoms (equivalently 1–3 nm core diameter). More importantly, have been crystallographically characterized, just like protein structures enzyme catalysis. Such merge features homogeneous catalysts ligand-protected centers) and enzymes protein-encapsulated clusters few bridged ligands). The with their total available constitute new class model hold great promise fundamental research, including dependent activity, control catalytic selectivity structure surface ligands, structure–property relationships atomic-level, insights into molecular activation mechanisms, identification active sites on nanocatalysts. This Review summarizes progress utilization for These nanocluster-based enabled heterogeneous research single-atom single-electron levels. Future efforts expected achieve more exciting understanding tailoring design high activity under mild conditions.

Language: Английский

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Metal–organic frameworks and their derivatives as electrocatalysts for the oxygen evolution reaction

Chemical Society Reviews, Journal Year: 2021, Volume and Issue: 50(4), P. 2663 - 2695

Published: Jan. 1, 2021

This review summarizes the recent progress on MOFs and their derivatives used for OER electrocatalysis in terms of morphology, composition structure–performance relationship.

Language: Английский

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Single‐Atom Cr−N₄ Sites Designed for Durable Oxygen Reduction Catalysis in Acid Media

Angewandte Chemie International Edition, Journal Year: 2019, Volume and Issue: 58(36), P. 12469 - 12475

Published: July 10, 2019

Single-atom catalysts (SACs) are attracting widespread interest for the catalytic oxygen reduction reaction (ORR), with Fe-Nx SACs exhibiting most promising activity. However, Fe-based suffer serious stability issues as a result of oxidative corrosion through Fenton reaction. Herein, using metal-organic framework an anchoring matrix, we first time obtained pyrolyzed Cr/N/C ORR, where atomically dispersed Cr is confirmed to have Cr-N4 coordination structure. The catalyst exhibits excellent ORR activity optimal half-wave potential 0.773 V versus RHE. More excitingly, substantially reduced and, thus, final show superb stability. innovative and robust active site opens new possibility circumvent issue non-noble metal catalysts.

Language: Английский

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Perfecting electrocatalystsviaimperfections: towards the large-scale deployment of water electrolysis technology

Energy & Environmental Science, Journal Year: 2021, Volume and Issue: 14(4), P. 1722 - 1770

Published: Jan. 1, 2021

A tuned electronic structure favors the electrocatalytic water splitting reactionviaaccelerating reaction kinetics, changing rate-determining step, and optimizing adsorption energy for intermediates; this is achievedviaintentionally incorporating imperfections into crystal lattices of electrocatalysts.

Language: Английский

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Rational Design of Better Hydrogen Evolution Electrocatalysts for Water Splitting: A Review

Advanced Science, Journal Year: 2022, Volume and Issue: 9(18)

Published: April 18, 2022

Abstract The excessive dependence on fossil fuels contributes to the majority of CO 2 emissions, influencing climate change. One promising alternative is green hydrogen, which can be produced through water electrolysis from renewable electricity. However, variety and complexity hydrogen evolution electrocatalysts currently studied increases difficulty in integration catalytic theory, catalyst design preparation, characterization methods. Herein, this review first highlights principles for reaction (HER) electrocatalysts, presenting thermodynamics, kinetics, related electronic structural descriptors HER. Second, reasonable design, mechanistic understanding, performance enhancement are deeply discussed based intrinsic extrinsic effects. Third, recent advancements electrocatalytic splitting technology further briefly. Finally, challenges perspectives development highly efficient proposed.

Language: Английский

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High‐Performance Hydrogen Evolution by Ru Single Atoms and Nitrided‐Ru Nanoparticles Implanted on N‐Doped Graphitic Sheet

Advanced Energy Materials, Journal Year: 2019, Volume and Issue: 9(26)

Published: May 28, 2019

Abstract The most efficient electrocatalyst for the hydrogen evolution reaction (HER) is a Pt‐based catalyst, but its high cost and nonperfect efficiency hinder wide‐ranging industrial/technological applications. Here, an of both ruthenium (Ru) single atoms (SAs) N‐doped‐graphitic(G N )‐shell‐covered nitrided‐Ru nanoparticles (NPs) (having Ru‐N x shell) embedded on melamine‐derived G matrix { 1 : [Ru(SA)+Ru(NP)@RuN @G ]/G }, which exhibits superior HER activity in acidic basic media, presented. In 0.5 m H 2 SO 4 /1 KOH solutions, shows diminutive “negative overpotentials” (−η = |η| 10/7 mV at 10 mA cm −2 , lowest ever) exchange current densities (4.70/1.96 ). remarkable performance attributed to near‐zero free energies adsorption/desorption Ru(SAs) increased conductivity sheets by presence nitrided‐Ru(NPs). nitridation process forming nitrided‐Ru(NPs), are imperfectly covered shell, allows superb long‐term operation durability. catalyst splits water into molecular oxygen 1.50/1.40 V (in 0.1 HClO KOH), demonstrating potential as ready‐to‐use, highly effective energy device industrial

Language: Английский

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Recent Progress on NiFe‐Based Electrocatalysts for the Oxygen Evolution Reaction

Small, Journal Year: 2020, Volume and Issue: 16(51)

Published: Nov. 27, 2020

The seriousness of the energy crisis and environmental impact global anthropogenic activities have led to an urgent need develop efficient green fuels. Hydrogen, as a promising alternative resource that is produced in environmentally friendly sustainable manner by water splitting reaction, has attracted extensive attention recent years. However, large-scale application devices hindered predominantly sluggish oxygen evolution reaction (OER) at anode. Therefore, design exploration high-performing OER electrocatalysts critical objective. Considering their low prices, abundant reserves, intrinsic activities, NiFe-based bimetal compounds are widely studied excellent electrocatalysts. Moreover, progress on alkaline environments comprehensively systematically introduced through various catalyst families including NiFe-layered hydroxides, metal-organic frameworks, (oxy)hydroxides, oxides, NiFe alloys, nonoxides. This review briefly introduces advanced materials corresponding mechanisms. Finally, challenges inherent possible strategies for producing extraordinary discussed.

Language: Английский

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Recent advances in ruthenium-based electrocatalysts for the hydrogen evolution reaction

Nanoscale Horizons, Journal Year: 2019, Volume and Issue: 5(1), P. 43 - 56

Published: Sept. 18, 2019

Exploration of electrocatalysts for clean and sustainable hydrogen generation from water splitting has received huge attention due to the depletion fossil fuels environmental pollution.

Language: Английский

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