Bimetallic porous porphyrin polymer-derived non-precious metal electrocatalysts for oxygen reduction reactions

Brüller, Sebastian; Liang, Haojun; Kramm, Ulrike I.; Krumpfer, Joseph W.; Feng, Xinliang; Müllen, Kläus

doi:10.1039/c5ta06309d

Cited by 97 publications

(40 citation statements)

References 60 publications

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“…The Co content is unambiguously detected by both EDS and XPS, with a bulk and surface Co content being 2.0 at% and 0.6 at%, respectively. Both pyrrolic N at 400.1 eV and CoN at 398.5 eV were observed on the high‐resolution N 1s XPS spectrum (Figure E) 13,21a. The CoN peak provides strong evidence of coordinated porphyrin with Co 2+ in G@POF‐Co.…”

Section: Resultsmentioning

confidence: 96%

“…Substrates for organic framework materials are usually high cost and difficult to obtain because highly symmetrical functional groups are required as knots for linkage. In addition, the procedure of synthesis and purification that commonly involves freeze‐pump‐thaw cycling, Soxhlet extraction, or column chromatography,7b is usually strict and demanding. Such complex operations induce grand challenges in repeatability and expanded large‐scale production.…”

Section: Introductionmentioning

confidence: 99%

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One‐Pot Synthesis of Framework Porphyrin Materials and Their Applications in Bifunctional Oxygen Electrocatalysis

Zhang

Chen

et al. 2019

Adv Funct Materials

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Organic framework materials constructed by covalently linking organic building blocks into framework structures are highly regarded as paragons to precisely control the material structure at the atomic level. Herein, a direct synthesis methodology is proposed as a guidance for the bulk synthesis of organic framework materials. Framework porphyrin (POF) materials are one-pot synthesized to demonstrate the advances of the direct synthesis methodology. The as-synthesized POF materials are intrinsically 2D and exhibit impressive versatility in composition, structure, morphology, and function, delivering a free-standing POF film, hybrids of POF and nanocarbon, and cobalt-coordinated POF. When applied as electrocatalysts for oxygen reduction reaction and oxygen evolution reaction, the cobaltcoordinated POF exhibits excellent bifunctional electrocatalytic performances comparable with noble-metal-based electrocatalysts. The direct synthesis methodology and resultant POF materials demonstrate the ability of controlling materials at the atomic level for energy electrocatalysis.

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Section: Resultsmentioning

confidence: 96%

Section: Introductionmentioning

confidence: 99%

One‐Pot Synthesis of Framework Porphyrin Materials and Their Applications in Bifunctional Oxygen Electrocatalysis

Zhang

Chen

et al. 2019

Adv Funct Materials

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“…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%

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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“…So far, a number of efforts have been devoted to explore various cost‐effective alternatives, such as spinel/perovskite oxides, heteroatom (N, S, P, etc.) doped carbon, carbon materials (porous carbon, carbon nanotube (CNT), carbon nanofiber, graphene/graphene oxide) supported with transition metal/oxides/nitrides/sulfides, and so on. Among them, transition metal and nitrogen codoped carbon (M, N–C) electrocatalysts have dramatically drawn attentions owing to their low‐cost and desirable catalytic activity.…”

Section: Introductionmentioning

confidence: 99%

“…Among them, transition metal and nitrogen codoped carbon (M, N–C) electrocatalysts have dramatically drawn attentions owing to their low‐cost and desirable catalytic activity. One of the most efficient strategies to prepare M, N–C electrocatalysts is the direct pyrolysis of appropriate precursors containing nitrogen, carbon, and transition metals, such as metal–organic frameworks, porphyrin polymer, polyimide, and so on . Another approach involves the post‐treatment of commercially available carbon materials, which usually contains several steps, such as doping/coating with metal precursor and postannealing under NH 3 gas .…”

Section: Introductionmentioning

confidence: 99%

Nitrogen‐Doped Hierarchical Porous Carbon Architecture Incorporated with Cobalt Nanoparticles and Carbon Nanotubes as Efficient Electrocatalyst for Oxygen Reduction Reaction

Chen

Kim

Aoki

et al. 2017

Adv Materials Inter

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Hierarchical porous carbon has attracted great interest because of its distinctive structure and superior properties for designing electrochemical energy storage and conversion devices. In this work, a novel method to fabricate nitrogen‐doped hierarchical porous carbon (NHPC) is reported, which is incorporated with Co nanoparticles and carbon nanotubes (CNTs). The NHPC is prepared using a facile and scalable MgO–Co template method. Metal nitrate–glycine solution combustion synthesis, followed by a high temperature calcination, is used to prepare MgO–Co/N‐doped carbon precursor. CNTs are formed by the in situ Co‐catalytic growth during heat treatment; at the same time, localized graphitic layers are also formed around the Co nanoparticles. After acid washing, NHPC with hierarchical multipores and ultrafine Co nanoparticles is obtained. When applied as oxygen reduction reaction (ORR) catalyst, the NHPC displays high catalytic activity not only in terms of onset potential and current density, but also superior durability and tolerance to methanol crossover in alkaline electrolyte. The remarkable ORR activity is originated from the cooperative effects of high specific surface area, hierarchical pore structure, ultrasmall Co nanocrystals, localized graphitic layers, CNTs, and N‐doping.

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Bimetallic porous porphyrin polymer-derived non-precious metal electrocatalysts for oxygen reduction reactions

Abstract: Bimetallic (Fe/Co) nitrogen-doped carbons as electrocatalysts for oxygen reduction reactions derived from conjugated, microporous metal–porphyrin networks with alternating CoN4- and FeN4-centers.

Cited by 97 publications

References 60 publications

One‐Pot Synthesis of Framework Porphyrin Materials and Their Applications in Bifunctional Oxygen Electrocatalysis

One‐Pot Synthesis of Framework Porphyrin Materials and Their Applications in Bifunctional Oxygen Electrocatalysis

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

Nitrogen‐Doped Hierarchical Porous Carbon Architecture Incorporated with Cobalt Nanoparticles and Carbon Nanotubes as Efficient Electrocatalyst for Oxygen Reduction Reaction

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