Single-metal-atom catalysts: An emerging platform for electrocatalytic oxygen reduction

Wang, Yong; Hu, Feilong; Mi, Yan; Li, Huaming; Zhao, Shenlong

doi:10.1016/j.cej.2020.127135

Cited by 71 publications

(35 citation statements)

References 101 publications

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“…Enormous efforts have been made to create low‐cost high‐performance MOF‐based electrocatalysts for ORR. [ 29 ] As an example, a 2D Ni 3 (HITP) 2 MOF (HITP = 2,3,6,7,10,11‐hexaiminotriphenylene) with a decent electrical conductivity of σ = 40 S cm −1 was successfully synthesized and used as the electrocatalyst for ORR ( Figure ). [ 30 ] Remarkably, Ni 3 (HITP) 2 MOF presented a positive E onset of 0.82 V and a small Tafel slope of −128 mV dec −1 in 0.1 m KOH electrolyte, comparable to those of the most active non‐Pt group metal (nPGM) electrocatalysts to date.…”

Section: Recent Progress On Pristine Mofs For Electrocatalysismentioning

confidence: 99%

Metal–Organic Frameworks for Electrocatalysis: Beyond Their Derivatives

et al. 2021

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Electrocatalysis is at the heart of many significant chemical transformation processes and advanced clean energy technologies. Traditional noble/transition metal oxides are widely used as electrocatalysts; however, they often suffer from intrinsic disadvantages, including low atom utilization, small surface area, and unfavorable tunability. Metal–organic frameworks (MOFs), as a new family of catalytic materials, are attracting extensive attention due to their unique physicochemical properties. The tremendous pristine MOF‐based materials are created using various synthetic approaches and further used for important energy conversions. Herein, a systematic overview on the unique merits and the state‐of‐the‐art design of MOF‐based electrocatalysts is offered. This review also presents recent advances in the development of various pristine MOFs and MOF‐based host–guest composite catalysts for electrocatalysis (i.e., oxygen reduction reaction, hydrogen oxidation reaction, hydrogen evolution reaction, oxygen evolution reaction, and CO2 reduction reaction) and discusses the future challenges and opportunities in this emerging field.

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Section: Recent Progress On Pristine Mofs For Electrocatalysismentioning

confidence: 99%

Metal–Organic Frameworks for Electrocatalysis: Beyond Their Derivatives

et al. 2021

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“…At present, several instructive articles have reviewed the SACs fabrication and coordination environment regulation. Most works merely focus on the metal-support interactions and reaction mechanisms for electrochemical or photocatalytic reactions, lacking a comprehensive and systematical understanding of strategies toward promoting various catalytic reactions based on SACs [ 29 – 32 ]. Recently, the extensive exploration of various modulation strategies for SACs extends their application in wider catalysis systems.…”

Section: Introductionmentioning

confidence: 99%

Engineering the Coordination Sphere of Isolated Active Sites to Explore the Intrinsic Activity in Single-Atom Catalysts

et al. 2021

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Reducing the dimensions of metallic nanoparticles to isolated, single atom has attracted considerable attention in heterogeneous catalysis, because it significantly improves atomic utilization and often leads to distinct catalytic performance. Through extensive research, it has been recognized that the local coordination environment of single atoms has an important influence on their electronic structures and catalytic behaviors. In this review, we summarize a series of representative systems of single-atom catalysts, discussing their preparation, characterization, and structure–property relationship, with an emphasis on the correlation between the coordination spheres of isolated reactive centers and their intrinsic catalytic activities. We also share our perspectives on the current challenges and future research promises in the development of single-atom catalysis. With this article, we aim to highlight the possibility of finely tuning the catalytic performances by engineering the coordination spheres of single-atom sites and provide new insights into the further development for this emerging research field.

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“…[273] In another example, Co-SA doped porous N-doped carbon exhibited good performance in solid-state Zn-Air battery and showed cycling stability of 125 cycles with an open circuit potential of 1.411 V. [274] Metal SA doped M-N x sites are majorly reported and also attract wide attention due to remarkable tuneability, selectivity, high efficiency, and diversity. [71] The coordination between the metal atom and N atoms significantly tunes its electronic environment, which helps to reduce the adsorption energy for intermediates. [275] Although the N coordination has a significant effect on the electronic environment of SA, the electrocatalytic performance may be further tuned with the help of another heteroatom doping such as S, P, B, F, etc.…”

Section: Zinc-air Batteriesmentioning

confidence: 99%

“…Several interesting review articles were published and summarized on various topics. [27,28,[64][65][66][67][68][69][70][71][72][73] In this short report, we mainly focused on the applications of SACs in benign ways of energy production (ORR, OER, HER, and metal-air batteries), and organic transformations (with and without electrochemical setup) which are published recently. [74][75][76][77][78] Apart from these applications, electrochemical applications of SA for hydrogen electro-oxidation, [79] formic acid, [80][81][82] methanol, [83,84] and CO oxidation, [85][86][87][88] CO 2 transformation into value-added chemicals which is now a day is a hot arena, [74,89,90] N 2 activation, [91][92][93][94] and metal-sulfur batteries [95][96][97] are highly desirable, but discussion about these topics are out of the scope of this report.…”

Section: Introductionmentioning

confidence: 99%

Single‐Atom Catalysts: A Sustainable Pathway for the Advanced Catalytic Applications

Singh

Sharma

Gaikwad

et al. 2021

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In order to achieve these goals, it is of fundamental importance to design new catalysts that enable new benign routes to produce/ store and convert renewable energies and to obtain chemicals from waste. [3][4][5] We need to design new chemical pathways that replace traditional petrochemicalbased routes, considering new platform molecules, possibly derived by renewable resources such as agriculture/municipal wastes. This transition must fully involve the energy sector, with the entire redefinition of the pool of energy vectors for transportations, building heating systems, and power production. As the burning of fossil fuels and biomass are not anymore compatible with the dramatic increasing air pollution and global warming.To achieve all these targets, we will need to design nontoxic, earth-abundant, and less-expensive, highly efficient, and selective catalysts that can work under mild reaction conditions without producing significant waste. [6,7] Catalytic activity and selectivity are enabled via the many factors such as accessibility of active sites, interaction with the surface, i.e., varying support and coordinating sphere, composition of metals (bimetallic and many-metallic), size and shape; and chemical states of active sites which can to tailored via developing 2D catalyst [8][9][10] or via developing single atomic sites stabilized on hollow A heterogeneous catalyst is a backbone of modern sustainable green industries; and understanding the relationship between its structure and properties is the key for its advancement. Recently, many upscaling synthesis strategies for the development of a variety of respectable control atomically precise heterogeneous catalysts are reported and explored for various important applications in catalysis for energy and environmental remediation. Precise atomic-scale control of catalysts has allowed to significantly increase activity, selectivity, and in some cases stability. This approach has proved to be relevant in various energy and environmental related technologies such as fuel cell, chemical reactors for organic synthesis, and environmental remediation. Therefore, this review aims to critically analyze the recent progress on single-atom catalysts (SACs) application in oxygen reduction reaction, oxygen evolution reaction, hydrogen evolution reaction, and chemical and/or electrochemical organic transformations. Finally, opportunities that may open up in the future are summarized, along with suggesting new applications for possible exploitation of SACs.

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Single-metal-atom catalysts: An emerging platform for electrocatalytic oxygen reduction

Cited by 71 publications

References 101 publications

Metal–Organic Frameworks for Electrocatalysis: Beyond Their Derivatives

Metal–Organic Frameworks for Electrocatalysis: Beyond Their Derivatives

Engineering the Coordination Sphere of Isolated Active Sites to Explore the Intrinsic Activity in Single-Atom Catalysts

Single‐Atom Catalysts: A Sustainable Pathway for the Advanced Catalytic Applications

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