From Bimetallic Metal‐Organic Framework to Porous Carbon: High Surface Area and Multicomponent Active Dopants for Excellent Electrocatalysis

Chen, Yuzhen; Wang, Chengming; Wu, Zhenyu; Xiong, Yujie; Xu, Qiang; Yu, Shu‐Hong; Jiang, Hai‐Long

doi:10.1002/adma.201502315

Cited by 1,283 publications

(627 citation statements)

References 63 publications

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“…300 nm) displayed the best performance toward the ORR, indicating that smaller particle size provides a larger surface area and facile access to catalytic centers, thus promoting enhanced mass and electron transfer. To develop rich and accessible active sites in Co-Nx-C composite catalyst, a series of bimetallic ZIFs (BMZIFs) grouping from ZIF-8 and ZIF-67, have been successfully synthesized in Jiang's group [56]. The BMZIFs-derived nanocarbon possesses both merits of carbon independently from ZIF-8 and ZIF-67, featuring a high degree of graphitization, large surface area, and highly dispersed C-Nx and Co-Nx-C active sites.…”

Section: Mof-derived Cobalt/cobalt Oxide-nanocarbon Electrocatalystsmentioning

confidence: 99%

Recent Progress on MOF-Derived Nanomaterials as Advanced Electrocatalysts in Fuel Cells

et al. 2016

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Developing a low cost, highly active and durable cathode material is a high-priority research direction toward the commercialization of low-temperature fuel cells. However, the high cost and low stability of useable materials remain a considerable challenge for the widespread adoption of fuel cell energy conversion devices. The electrochemical performance of fuel cells is still largely hindered by the high loading of noble metal catalyst (Pt/Pt alloy) at the cathode, which is necessary to facilitate the inherently sluggish oxygen reduction reaction (ORR). Under these circumstances, the exploration of alternatives to replace expensive Pt-alloy for constructing highly efficient non-noble metal catalysts has been studied intensively and received great interest. Metal-organic frameworks (MOFs) a novel type of porous crystalline materials, have revealed potential application in the field of clean energy and demonstrated a number of advantages owing to their accessible high surface area, permanent porosity, and abundant metal/organic species. Recently, newly emerging MOFs materials have been used as templates and/or precursors to fabricate porous carbon and related functional nanomaterials, which exhibit excellent catalytic activities toward ORR or oxygen evolution reaction (OER). In this review, recent advances in the use of MOF-derived functional nanomaterials as efficient electrocatalysts in fuel cells are summarized. Particularly, we focus on the rational design and synthesis of highly active and stable porous carbon-based electrocatalysts with various nanostructures by using the advantages of MOFs precursors. Finally, further understanding and development, future trends, and prospects of advanced MOF-derived nanomaterials for more promising applications of clean energy are presented.

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Section: Mof-derived Cobalt/cobalt Oxide-nanocarbon Electrocatalystsmentioning

confidence: 99%

Recent Progress on MOF-Derived Nanomaterials as Advanced Electrocatalysts in Fuel Cells

et al. 2016

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“…The concept of the synthesis technique is a simple pyrolysis, heat treatment in an inert atmosphere, which carbonizes the MOF towards embedded metal nanoparticles in a porous C matrix (M@C). The resulting nanoparticle-carbon composites possess outstanding properties for application in electrodes, electrocatalysts and H 2 /CO 2 adsorbents [9][10][11][12][13] ; these materials amongst many others have been comprehensively reviewed 14 . Recent investigations into MOF-derived catalysts for FTS by the group of Wang confirmed the high potential of the Fe@C system using the MIL-88B topology as catalyst precursor 15 .…”

Section: Introductionmentioning

confidence: 99%

Structural and elemental influence from various MOFs on the performance of Fe@C catalysts for Fischer–Tropsch synthesis

et al. 2017

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The structure and elementary composition of various commercial Fe-based MOFs used as precursors for Fischer–Tropsch synthesis (FTS) catalysts have a large influence on the high-temperature FTS activity and selectivity of the resulting Fe on carbon composites. The selected Fe-MOF topologies (MIL-68, MIL-88A, MIL-100, MIL-101, MIL-127, and Fe-BTC) differ from each other in terms of porosity, surface area, Fe and heteroatom content, crystal density and thermal stability. They are re-engineered towards FTS catalysts by means of simple pyrolysis at 500 °C under a N2 atmosphere and afterwards characterized in terms of porosity, crystallite phase, bulk and surface Fe content, Fe nanoparticle size and oxidation state. We discovered that the Fe loading (36–46 wt%) and nanoparticle size (3.6–6.8 nm) of the obtained catalysts are directly related to the elementary composition and porosity of the initial MOFs. Furthermore, the carbonization leads to similar surface areas for the C matrix (SBET between 570 and 670 m2 g−1), whereas the pore width distribution is completely different for the various MOFs. The high catalytic performance (FTY in the range of 1.9–4.6 × 10−4 molCO gFe−1 s−1) of the resulting materials could be correlated to the Fe particle size and corresponding surface area, and only minor deactivation was found for the N-containing catalysts. Elemental analysis of the catalysts containing deliberately added promoters and inherent impurities from the commercial MOFs revealed the subtle interplay between Fe particle size and complex catalyst composition in order to obtain high activity and stability next to a low CH4 selectivity.

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“…The heteroatoms, especially nitrogen, have the inclination to form heteroatom-metal active sites and increase catalytic efficiency during oxygen reduction [10,13]. In addition, the graphitization of the porous carbon matrix enhances electrical conductivity and therefore the catalytic performance [14,15]. However, in spite of tremendous efforts, ideal materials with excellent electrochemical activity and durability are yet to be developed.…”

Section: Introductionmentioning

confidence: 99%

“…The weak thermal stability of MOFs makes it possible to preserve their porous structure, uniform element distribution, and high porosity when transformed into porous carbon via pyrolysis [15,26,28]. Thus, MOF-derived catalysts have been the actively studied materials with comparable or better ORR catalytic performance than Pt-based catalysts [14,15,29]. Among them, transition metals in porous carbon matrix have been regarded promising to replace Pt-based materials.…”

Section: Introductionmentioning

confidence: 99%

“…In recent years, carbon-based bimetallic ORR catalysts appear and have swiftly become widely studied. Although the hybrid of precious metal and non-precious metal presents excellent performance [31,32], alloys of different non-precious metals, for instance, CuFe, FeCo, CuCo and ZnCo [14,[33][34][35], also have potential because of the abundance and low cost. However, no studies have developed efficient nanocomposites that incorporate Cu and Ni as ORR catalysts.…”

Section: Introductionmentioning

confidence: 99%

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Bimetallic organic frameworks derived CuNi/carbon nanocomposites as efficient electrocatalysts for oxygen reduction reaction

et al. 2017

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Catalysts of oxygen reduction reaction (ORR)play key roles in renewable energy technologies such as metal-air batteries and fuel cells. Despite tremendous efforts, highly active catalysts with low cost remain elusive. This work used metal-organic frameworks to synthesize non-precious bimetallic carbon nanocomposites as efficient ORR catalysts. Although carbon-based Cu and Ni are good candidates, the hybrid nanocomposites take advantage of both metals to improve catalytic activity. The resulting molar ratio of Cu/Ni in the nanocomposites can be finely controlled by tuning the recipe of the precursors. Nanocomposites with a series of molar ratios were produced, and they exhibited much better ORR catalytic performance than their monometallic counterparts in terms of limited current density, onset potential and half-wave potential. In addition, their extraordinary stability in alkaline is superior to that of commercially-available Pt-based materials, which adds to the appeal of the bimetallic carbon nanocomposites as ORR catalysts. Their improved performance can be attributed to the synergetic effects of Cu and Ni, and the enhancement of the carbon matrix.

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From Bimetallic Metal‐Organic Framework to Porous Carbon: High Surface Area and Multicomponent Active Dopants for Excellent Electrocatalysis

Cited by 1,283 publications

References 63 publications

Recent Progress on MOF-Derived Nanomaterials as Advanced Electrocatalysts in Fuel Cells

Recent Progress on MOF-Derived Nanomaterials as Advanced Electrocatalysts in Fuel Cells

Structural and elemental influence from various MOFs on the performance of Fe@C catalysts for Fischer–Tropsch synthesis

Bimetallic organic frameworks derived CuNi/carbon nanocomposites as efficient electrocatalysts for oxygen reduction reaction

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