Recent advances in activating surface reconstruction for the high-efficiency oxygen evolution reaction

Chemical Society Reviews, Год журнала: 2021, Номер 50(15), С. 8428 - 8469

Опубликована: Янв. 1, 2021

The recent progress in activating surface reconstruction by integrating advanced characterizations with theoretical calculations for high-efficiency oxygen evolution reaction is reviewed.

Язык: Английский

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Advanced Transition Metal‐Based OER Electrocatalysts: Current Status, Opportunities, and Challenges

Small, Год журнала: 2021, Номер 17(37)

Опубликована: Июнь 10, 2021

Abstract Oxygen evolution reaction (OER) is an important half‐reaction involved in many electrochemical applications, such as water splitting and rechargeable metal–air batteries. However, the sluggish kinetics of its four‐electron transfer process becomes a bottleneck to performance enhancement. Thus, rational design electrocatalysts for OER based on thorough understanding mechanisms structure‐activity relationship vital significance. This review begins with introduction which include conventional adsorbate mechanism lattice‐oxygen‐mediated mechanism. The pathways related intermediates are discussed detail, several descriptors greatly assist catalyst screen optimization summarized. Some parameters suggested measurement criteria also mentioned discussed. Then, recent developments breakthroughs experimental achievements transition metal‐based reviewed reveal novel principles. Finally, some perspectives future directions proposed further catalytic enhancement deeper design. It believed that iterative improvements fundamental principles essential realize applications efficient energy storage conversion technologies.

Язык: Английский

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Strategies of regulating Zn²⁺solvation structures for dendrite-free and side reaction-suppressed zinc-ion batteries

Energy & Environmental Science, Год журнала: 2021, Номер 15(2), С. 499 - 528

Опубликована: Дек. 21, 2021

This review gives a comprehensive introduction of the solvation structure regulation strategies for dendrite-free and side reaction-suppressed zinc-ion batteries, further proposes potential directions perspectives research.

Язык: Английский

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Heterogeneous Bimetallic Phosphide Ni₂P‐Fe₂P as an Efficient Bifunctional Catalyst for Water/Seawater Splitting

Advanced Functional Materials, Год журнала: 2020, Номер 31(1)

Опубликована: Сен. 28, 2020

Abstract Developing high‐performance and cost‐effective bifunctional electrocatalysts for large‐scale water electrolysis is desirable but remains a significant challenge. Most existing nano‐ micro‐structured require complex synthetic procedures, making scale‐up highly challenging. Here, heterogeneous Ni 2 P‐Fe P microsheet synthesized by directly soaking foam in hydrochloric acid an iron nitrate solution, followed phosphidation. Benefiting from high intrinsic activity, abundant active sites, superior transfer coefficient, this self‐supported electrocatalyst shows superb catalytic activity toward overall splitting, requiring low voltages of 1.682 1.865 V to attain current densities 100 500 mA cm −2 1 m KOH, respectively. Such performance the benchmark IrO || Pt/C pair also places among best catalysts reported thus far. Furthermore, its enhanced corrosion resistance hydrophilic surface make it suitable seawater splitting. It able achieve KOH at 1.811 2.004 V, respectively, which, together with robust durability, demonstrates great potential realistic electrolysis. This work presents general economic approach fabrication metallic phosphide water/seawater electrocatalysis.

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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Transition‐Metal Phosphides: Activity Origin, Energy‐Related Electrocatalysis Applications, and Synthetic Strategies

Advanced Functional Materials, Год журнала: 2020, Номер 30(45)

Опубликована: Сен. 6, 2020

Abstract Developing highly efficient and stable electrocatalysts plays an important role in energy‐related electrocatalysis fields. Transition‐metal phosphides (TMPs) possess a series of advantages, such as high conductivity, earth‐abundance reserves, good physicochemical properties, therefore arousing wide attention. In this review, the electrochemical activity origin TMPs, allowing rational design construction toward various energy‐relevant reactions is first discussed. Subsequently, their unique nature hydrogen evolution reaction (HER), oxygen (OER), reduction (ORR), oxidation (HOR), carbon dioxide (CO 2 RR), nitrogen (NRR), urea (UOR), methanol (MOR), others highlighted. Then, TMPs’ synthetic strategies are analyzed summarized systematically. Finally, existing key issues, countermeasures, future challenges TMPs briefly

Язык: Английский

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Doping regulation in transition metal compounds for electrocatalysis

Chemical Society Reviews, Год журнала: 2021, Номер 50(17), С. 9817 - 9844

Опубликована: Янв. 1, 2021

This review summarizes the recent progress related to field of doping regulation in transition metal compounds, aiming give an overview this strategy for designing high-performance catalysts towards electrocatalytic applications.

Язык: Английский

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Advanced High Entropy Perovskite Oxide Electrocatalyst for Oxygen Evolution Reaction

Advanced Functional Materials, Год журнала: 2021, Номер 31(27)

Опубликована: Май 5, 2021

Abstract A new type of lanthanum‐based high entropy perovskite oxide (HEPO) electrocatalyst for the oxygen evolution reaction is reported. The B‐site lattices in HEPO consist five consecutive first‐row transition metals, including Cr, Mn, Fe, Co, and Ni. Equimolar non‐equimolar electrocatalysts are studied their OER electrocatalytic performance. In HEPOs, concentration one metals doubled individual samples. performances all HEPOs outperform single oxides. optimized La(CrMnFeCo 2 Ni)O 3 exhibits an outstanding overpotential 325 mV at a current density 10 mA cm −2 excellent electrochemical stability after 50 h testing.

Язык: Английский

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Single Atom Ruthenium‐Doped CoP/CDs Nanosheets via Splicing of Carbon‐Dots for Robust Hydrogen Production

Angewandte Chemie International Edition, Год журнала: 2021, Номер 60(13), С. 7234 - 7244

Опубликована: Янв. 15, 2021

Abstract Ultrathin two‐dimensional catalysts are attracting attention in the field of electrocatalytic hydrogen evolution. This work describe a composite material design which CoP nanoparticles doped with Ru single‐atom sites supported on carbon dots (CDs) single‐layer nanosheets formed by splicing CDs (Ru 1 CoP/CDs). Small CD fragments bore abundant functional groups, analogous to pieces jigsaw puzzle, and could provide high density binding immobilize CoP. The single‐particle‐thick acted as supports, improved conductivity electrocatalyst stability catalyst during operation. CoP/CDs from doping atomic dispersed showed very efficiency for evolution reaction (HER) over wide pH range. prepared under optimized conditions displayed outstanding activity: overpotential HER at current 10 mA cm −2 was low 51 49 mV alkaline acidic conditions, respectively. Density theory calculations that substituted single atoms lowered proton‐coupled electron transfer energy barrier promoted H−H bond formation, thereby enhancing catalytic performance HER. findings open new avenue developing carbon‐based hybridization materials integrated water splitting.

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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