In situ formation of amorphous Fe-based bimetallic hydroxides from metal-organic frameworks as efficient oxygen evolution catalysts

Xu, You; Ren, Kaili; Xu, Rong

doi:10.1016/s1872-2067(20)63741-x

Cited by 41 publications

(28 citation statements)

References 67 publications

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“…Many strategies have been used to overcome these drawbacks, such as doping with metal/noble‐metal ions, [ 43 ] combining high electrical conductivity materials with MOFs, [ 19,20 ] jointing metal oxides/sulfides/phosphides with MOFs, [ 20,40,41 ] modifying the structure and morphology of the MOFs, [ 44 ] etc. In the past several years, the MOFs‐based photocatalysts have been utilized for different energy conversion systems, including hydrogen evolution reaction (HER), [ 58 ] oxygen evolution reaction (OER), [ 59 ] overall water splitting, [ 60 ] nitrogen reduction reaction (NRR), [ 61 ] carbon dioxide reduction reaction (CO 2 RR), [ 62 ] photodegradation of organic pollutants (PDOP), [ 63 ] and so on. Benefiting from their outstanding properties, more and more research works based on MOFs and their composites have been published in the field of photocatalysis.…”

Section: Introductionmentioning

confidence: 99%

A Review of MOFs and Their Composites‐Based Photocatalysts: Synthesis and Applications

Qian

Zhang

Pang

2021

Adv Funct Materials

359

157

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Photocatalysis is considered to be a green and environment‐friendly technology since it can convert solar energy into other types of chemical energies. Over the past several years, metal‐organic frameworks (MOFs)‐based photocatalysts have received remarkable research interest due to their unique morphology, high photocatalytic performance, good chemical stability, easy synthesis, and low cost. In this review, the synthetic strategies of developing MOFs‐based photocatalysts are first introduced. Second, the recent progress in the fabrication of various types of MOFs composites photocatalysts is summarized. Third, the different applications including hydrogen evolution reaction, oxygen evolution reaction, overall water splitting, nitrogen reduction reaction, carbon dioxide reduction reaction as well as photodegradation of organic pollutants of MOFs‐based photocatalysts are summed up. Finally, the challenges and some suggestions for the future development of MOFs‐ and their composites‐based photocatalysts are also highlighted. It is expected that this report will help researchers to systematically devise and develop highly efficient photocatalysts based on MOFs and their composites.

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Section: Introductionmentioning

confidence: 99%

A Review of MOFs and Their Composites‐Based Photocatalysts: Synthesis and Applications

Qian

Zhang

Pang

2021

Adv Funct Materials

359

157

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“…[19] Xu et al reported an amorphous bimetallic hydroxide (NiFe-OH) coated on glassy carbon electrodes with a small overpotential of 270 mV at 10 mA/cm 2 . [20] Yet, the structurerelated electrocatalytic properties of amorphous metal hydroxides are not fully understood.…”

Section: Introductionmentioning

confidence: 99%

“…[21] It was suggested that construction of 3D hierarchical nanostructure is an efficient way to further improve the OER activity due to the large surface areas and increased numbers of exposed active sites. [12][13][14][15][16][17][18][19][20][21][22][23][24] In addition, the synergetic interaction of different components in the heterostructures can regulate the electronic structure, therefore to further optimize the electrocatalytic activity towards OER. [25][26][27][28][29] For example, Gao et al reported that the strongly chemical couplings in CoO/CoFe-LDHs catalyst triggered charge transfer at the hybrid interface and achieved low overpotential of 254 mV toward OER.…”

Section: Introductionmentioning

confidence: 99%

“…For example, tailoring LDHs into few‐layer nanosheets can expose more active edge sites and shorten the diffusion length of ions and electrons, therefore to enhance the catalytic activity towards OER [21] . It was suggested that construction of 3D hierarchical nanostructure is an efficient way to further improve the OER activity due to the large surface areas and increased numbers of exposed active sites [12–24] . In addition, the synergetic interaction of different components in the heterostructures can regulate the electronic structure, therefore to further optimize the electrocatalytic activity towards OER [25–29] .…”

Section: Introductionmentioning

confidence: 99%

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Hierarchical Heterostructure of Amorphous CoFe@CoNi Hydroxides Composite on Nickel Foam as Efficient Electrocatalyst for Oxygen Evolution Reaction

2022

ChemCatChem

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Design of efficient and low-cost electrocatalysts for oxygen evolution reaction (OER) is of great importance for practical energy-related technologies such as hydrogen production. Herein, CoFe@CoNi hydroxides composite supported on nickel foam (NF) as electrocatalyst for OER was prepared via a twostep electrodeposition method. The CoFe@CoNi hydroxides composite has an amorphous structure with a hierarchical nanostructure where small nanosheets of CoNi hydroxide were decorated on the large nanosheet of CoFe hydroxide. The architecture provides abundant electrochemically active surface area with more exposed active sites as well as the small electron-transfer resistance at the interface to promote the catalytic activity for OER. In addition, the core-shell hierarchical nanostructure may further improve the catalytic activity by regulating the electronic structure due to the synergetic interaction of CoFe and CoNi hydroxides. It is noted that the deposition sequence is important to form hierarchical heterostructure, and no hierarchical structure can be obtained by depositing CoFe hydroxide on CoNi hydroxide due to the reconfiguration of the metal ions during the synthesis. CoFe@CoNi hydroxides composite shows efficient electrocatalytic activity toward OER with an overpotential of 0.227 V at a current density of 10 mA/cm 2 and a long-term durability in 1.0 M KOH.

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“…At the same time, research has revealed that defect modification is an effective means of regulating catalyst properties. Defect sites with special electronic structure and unique coordination environment can be used as active sites to achieve the preparation of specific catalyst materials and can also be used to promote the occurrence of catalytic reactions. − Nevertheless, how to introduce defects into nanocatalyst materials with special phase structures easily and conveniently, and how to precisely generate ordered vacancies in ordered structures is still a problem that deserves to be studied in depth.…”

mentioning

confidence: 99%

Ordered Vacancies on the Body-Centered Cubic PdCu Nanocatalysts

Wang

Liu

et al. 2021

Nano Lett.

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Defect engineering has become one of the important considerations in today's electrocatalyst design. However, the vacancies in the ordered crystal structure (especially body-centered cubic (bcc) and the effect of ordered vacancies (OVs) on the electronic fabric have not been researched yet. In this work, we report the inaugural time of the generation of OVs in the bcc architecture and discuss the insight of the modulation system of the material and its part in the electrochemical N 2 reduction reaction (NRR). OV-PdCu-2 achieves the highest Faradaic efficiency value of 21.5% at 0.05 V versus RHE. When the potential increases to 0 V versus RHE, the highest ammonia yield is 55.54 μg h −1 mg cat −1 , which is significantly better than the unetched PdCu nanoparticles (12.83 μg h −1 mg cat −1

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In situ formation of amorphous Fe-based bimetallic hydroxides from metal-organic frameworks as efficient oxygen evolution catalysts

Cited by 41 publications

References 67 publications

A Review of MOFs and Their Composites‐Based Photocatalysts: Synthesis and Applications

A Review of MOFs and Their Composites‐Based Photocatalysts: Synthesis and Applications

Hierarchical Heterostructure of Amorphous CoFe@CoNi Hydroxides Composite on Nickel Foam as Efficient Electrocatalyst for Oxygen Evolution Reaction

Ordered Vacancies on the Body-Centered Cubic PdCu Nanocatalysts

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