Structural and Electronic Modulation of Iron-Based Bimetallic Metal–Organic Framework Bifunctional Electrocatalysts for Efficient Overall Water Splitting in Alkaline and Seawater Environment

Luo, Yun; Yang, Xiaodong; He, Li; Zheng, Yang; Pang, Jianxiang; Wang, Liping; Jiang, Rong; Hou, Juan; Guo, Xuhong; Chen, Long

doi:10.1021/acsami.2c05181

Cited by 57 publications

(29 citation statements)

References 56 publications

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“…Chen and co-workers investigated the hydrolysis performance of different divalent metals with Fe-based bimetallic MOFs by a one-pot hydrothermal method in 2022. 42 The highest ECSA of the optimal CdFe-MOF was obtained to be 3.02 mF cm −2 , with a TOF value of 0.325 s −1 at 280 mV, with an overpotential of only 148 mV required to reach 10 mA cm −2 . Also based on DFT calculations, it was revealed that the introduction of Cd atoms greatly reduces the hydrogen adsorption energy.…”

Section: Mof-based Electrocatalysts For the Hydrogen Evolution Reactionmentioning

confidence: 89%

Recent progress in metal–organic frameworks (MOFs) for electrocatalysis

et al. 2023

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Section: Mof-based Electrocatalysts For the Hydrogen Evolution Reactionmentioning

confidence: 89%

Recent progress in metal–organic frameworks (MOFs) for electrocatalysis

et al. 2023

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“…Incorporating additional functional components is recognized as an effective means to modulate the electronic structure and explore synergistic effects of MOF catalysts, thus delivering enhanced catalytic activity that cannot be achieved with MOF alone 108,109 . Luo and colleagues synthesized bimetallic CdFe-MOFs supported on NF with remarkable OER performance in alkaline and seawater media compared with Fe- BOC 110 . Since the introduced Cd atoms were exposed to the surface of MOFs, their dangling bonds were saturated by oxygen atoms, which affected the coordination environment of Fe-BDC, thus resulting in changes in the morphology of Fe-BDC.…”

Section: Other Transition Metal Catalystsmentioning

confidence: 99%

Recent Advances in Self-Supported Transition-Metal-Based Electrocatalysts for Seawater Oxidation

Qian¹,

Qingping²,

Shu³

et al. 2023

Acta Physico Chimica Sinica

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Seawater electrolysis is a promising and sustainable technology for green hydrogen production. However, some disadvantages include sluggish kinetics, competitive chlorine evolution reaction at the anode, chloride ion corrosion, and surface poisoning, which has led to a decline in activity and durability and low oxygen evolution reaction (OER) selectivity of the anodic electrodes. Benefiting from the lower interface resistance, larger active surface, and superior stability, the self-supported nanoarrays have emerged as advanced catalysts compared to conventional powder catalysts. Self-supported catalysts have more advantages than powder catalysts, particularly in practical large-scale hydrogen production applications requiring high current density. During electrolysis, due to the influx of bubbles generated on the electrode surface, the powdered nanomaterial is peeled off easily, resulting in reduced catalytic activity and even frequent replacement of the catalyst. In contrast, self-supported nanoarray possessing strong adhesion between the active species and the substrates ensures good electronic conductivity and high mechanical stability, which is conducive to long-term use and recycling. This minireview summarizes the recent progress of selfsupported transition-metal-based catalysts for seawater oxidation, including (oxy)hydroxides, nitrides, phosphides, and chalcogenides, emphasizing the strategies in response to the corrosion and competitive reactions to ensure high activity and selectivity in OER processes. In general, constructing three-dimensional porous nanostructures with high porosity and roughness can enlarge the surface areas to expose more active sites for oxygen evolution, which is an efficient strategy for improving mass transfer and catalytic efficiency. Furthermore, the Cl − barrier layer on the surface of catalyst, particularly that with both catalytic activity and protection, can effectively inhibit the competitive oxidation and corrosion of Cl − , thereby delivering enhanced catalytic activity, selectivity, and stability of the catalysts. Moreover, developing super hydrophilic and hydrophobic surfaces is a promising strategy to increase the permeability of electrolytes and avoid the accumulation of large amounts of bubbles on the surface of the self-supported electrodes, thus promoting the effective utilization of active sites. Finally, perspectives and suggestions for future research in OER catalysts for seawater electrolysis are provided. In particular, the medium for seawater electrolysis should be transferred from simulated saline water to natural seawater. Considering the challenges faced in natural seawater splitting, in addition to designing and synthesizing self-supported catalysts with high activities, selectivity, and stability, developing simple and low-cost natural seawater pretreatment

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“…Accommodation of several different metal ions and organic linkers into a single framework has been realized in the multivariate MOFs, leading to complicated sequences and modulated properties . MOFs have also been proven to be useful precursors and templates to prepare various derivatives through postsynthetic structure transformation under either physical or chemical treatments. , These derivatives include a large family of nanosized electrocatalysts as complex chemical systems, showing a great potential to promote efficient energy conversion. − …”

Section: Introductionmentioning

confidence: 99%

Multicomponent 3d-Metal Nanoparticles in Amorphous Carbon Sponge for Electrocatalysis Water Splitting

Yin

Huang

et al. 2023

ACS Appl. Nano Mater.

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Design and understanding of complex material systems represent an intriguing pursuit for chemical research and could lead to functional materials with superior performance and new applications. Here, a highly porous amorphous carbon sponge incorporating uniformly dispersed multicomponent 3d-metal nanoparticles was prepared from heterometal cluster-based metal−organic frameworks (MOFs) of [M 3 (bpt) 2 (DMF) 2 (H 2 O) 2 ] (M = Fe 2+ , Co 2+ , and Ni 2 ) through controllable structural transformation under mild temperature. The octahedral coordination geometry of metal ions in the [M 3 (COO) 6 ] nodes is highly versatile and compatible with various metal ions, thus rendering the metal mode as an ideal platform to assemble mono-, bi-, and trimetallic clusters as precursors for heterometallic nanoparticles. A mild temperature of 400 °C was found to be optimal to produce NiCoFeO x @C-400, featuring extremely small particles as low as 5 nm in diameter, high-content amorphous carbon, and coexistence of different metal oxide phases covering M 3 O 4 , M 2 O 3 , and MO besides the metal alloy nanoparticles. In contrast, higher annealing temperatures of 600 and 800 °C lead to aggregated particles above 100 nm, low-content and dense graphitized carbon, and simple oxide phases. The presence of heterometals, multicomponent synergism, rich heterojunctions, phase boundaries, and porous carbon promotes mass transport and contributes to the prominent electrocatalyst performance of NiCoFeO x @C-400, which is better than that of bi/ monometallic species and high-temperature derivatives. When coated on nickel foam, NiCoFeO x @C-400 realizes small overpotentials of 253 and 84 mV for the oxygen evolution reaction (OER) and hydrogen evolution reaction (HER), respectively, and can work with a cell voltage of merely 1.63 V for durable overall water splitting, under a current density of 10 mA cm −2 using 1 M KOH as the electrolyte. This study presents an efficient strategy to prepare and expand chemically complex systems for energy conversion application.

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Structural and Electronic Modulation of Iron-Based Bimetallic Metal–Organic Framework Bifunctional Electrocatalysts for Efficient Overall Water Splitting in Alkaline and Seawater Environment

Cited by 57 publications

References 56 publications

Recent progress in metal–organic frameworks (MOFs) for electrocatalysis

Recent progress in metal–organic frameworks (MOFs) for electrocatalysis

Recent Advances in Self-Supported Transition-Metal-Based Electrocatalysts for Seawater Oxidation

Multicomponent 3d-Metal Nanoparticles in Amorphous Carbon Sponge for Electrocatalysis Water Splitting

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