Directed Growth of Metal‐Organic Frameworks and Their Derived Carbon‐Based Network for Efficient Electrocatalytic Oxygen Reduction

Li, Zhenhua; Shao, Mingfei; Zhou, Lei; Zhang, Ruikang; Zhang, Cong; Wei, Min; Evans, David G.; Duan, Xue

doi:10.1002/adma.201505086

Cited by 465 publications

(284 citation statements)

References 52 publications

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“…As an important alternative to Pt catalysts, MOF-derived materials exhibit remarkable ORR performance in terms of activity, durability, and tolerance to methanol. [24,[32][33][34][38][39][40][41][42][43][44]47,53,[58][59][60][61][62][63][65][66][67][68][69][70][71][72][73][75][76][77]81,83,97,99,[107][108][109] In particular, some newly developed MOF derivatives achieved highly improved activity that is comparable and even superior to Pt catalysts under identical experimental conditions. Table 1 summarizes the catalytic performances of representative MOF-derived electrocatalysts for the ORR.…”

Section: Orrmentioning

confidence: 99%

“…So far, some MOF-derived materials especially MNC catalysts have been investigated as ORR electrocatalysts in acidic conditions, which exhibited promising activity to satifiy practical demand. [24,38,71,73,107] However, few studies have elucidated the catalytic ORR mechanism on particular MNC configurations in order to understand the structure-performance relationship. Until recently, Lai and co-workers synthesized an FeN/C electrocatalyst derived from Fe-mIm nanoclusters (guest) in ZIF-8 (host) via pyrolysis (900 °C in N 2 for 2 h), acid (0.5 m H 2 SO 4 ) etching, and a second heat treatment (same conditions as pyrolysis), and studied different types of FeN x sites with two-, four-, and five-coordinated configurations on a porous carbon matrix.…”

Section: Orrmentioning

confidence: 99%

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Design Strategies toward Advanced MOF‐Derived Electrocatalysts for Energy‐Conversion Reactions

Liu

Zhu

Guo

et al. 2017

Advanced Energy Materials

609

351

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great potential to meet our ever-growing demand for energy. These devices appear most promising due to their high energyconversion and storage efficiencies, portability, which can mitigate the intermittent distribution of the aforementioned energy in space and time, and environmental benignancy. [6][7][8][9][10] Fundamentally, these electrochemical systems or devices involve different energy-conversion reactions, such as the oxygen reduction reaction (ORR), oxygen evolution reaction (OER), hydrogen evolution reaction (HER) and electrochemical CO 2 reduction (ECR), which provide energy by directly converting chemical energy (e.g., methanol, ethanol, zinc, and hydrogen) into electrical energy, or store energy vice versa. [6][7][8][9][10][11][12] The intrinsically sluggish kinetics of these reactions highlights the critical role of electrocatalysts. In this regard, the development of advanced electrocatalysts has always been the technological bottleneck that hinders the practical applications of these energy techniques at any appreciable scale. [7][8][9][10][11][12] Currently, noble-metal-based materials (e.g., Pt, IrO 2 , RuO 2 , and Au) are considered to be state-of-the-art catalysts for a variety of energy devices, [13][14][15][16] such as proton exchange membrane fuel cells (PEMFCs). [13] In spite of their outstanding catalytic performance for many electrochemical reactions, the high cost and scarcity of these noble metals severely hamper their large-scale commercialization. [17] Further, precious metal catalysts face issues with poisoning when exposed to a range of chemical compounds like methaol and carbon monoxide, leading to significant activity loss. [18] Therefore, extensive studies have focused on the development of alternative electrocatalysts with high activity, long stability, low cost, widespread availability, and facile synthesis. [8][9][10]19,20] To replace precious-metal-based catalysts, a wide range of non-noble-metal materials, especially transition-metal-based materials and metal-free carbon materials, have been intensively investigated as electrocatalysts for different applications. [21] Most of these electrocatalyst candidates show great promise in energy-conversion reactions. Nevertheless, very few alternative materials have yet to achieve superior electrochemical properties to those of noble-metal-based catalysts. Fortunately, the accumulation of experimental and theoretical studies have significantly advanced our knowledge on the chemical and physical nature of various candidate materials. [10][11][12] For example, our group has shed light on the activity origin of The key challenge to developing renewable and clean energy technologies lies in the rational design and synthesis of efficient and earth-abundant catalysts for a wide variety of electrochemical reactions. This review presents materials design strategies for constructing improved electrocatalysts based on MOF precursors/templates, with special emphasis on component manipulation, morphology control, and structure engineering. G...

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Section: Orrmentioning

confidence: 99%

Section: Orrmentioning

confidence: 99%

Design Strategies toward Advanced MOF‐Derived Electrocatalysts for Energy‐Conversion Reactions

Liu

Zhu

Guo

et al. 2017

Advanced Energy Materials

609

351

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“…Zeolitic imidazolate framework (ZIF) constitutes another precursor used often for the preparation of 2D/3D controllable structures More precisely, this is a zeolite-type nanoscale metalorganic framework (MOF), which is used as a self-sacrificing template as well as both carbon and nitrogen source [43]. A 2D carbon-based network electrocatalyst (Co-Al-LDH@ZIF67-800 °C), consisting of well-defined metal-organic framework (MOF) arrays on layered double hydroxides (LHDs) exhibited a limiting current density of 5.2 mA•cm −2 , with half-wave potential of 0.675 V vs. RHE; no reaction was observed in the presence of 2.0 M methanol [39]. Moreover, the as-prepared electrocatalyst presented superior durability as it lost only 1% of its activity after 5.5 h of operation at −0.5 V vs. RHE; under the same operation conditions, Pt/C lost 40% of its activity [39].…”

Section: D and 3d Doped-carbon Electrocatalystsmentioning

confidence: 99%

“…A 2D carbon-based network electrocatalyst (Co-Al-LDH@ZIF67-800 °C), consisting of well-defined metal-organic framework (MOF) arrays on layered double hydroxides (LHDs) exhibited a limiting current density of 5.2 mA•cm −2 , with half-wave potential of 0.675 V vs. RHE; no reaction was observed in the presence of 2.0 M methanol [39]. Moreover, the as-prepared electrocatalyst presented superior durability as it lost only 1% of its activity after 5.5 h of operation at −0.5 V vs. RHE; under the same operation conditions, Pt/C lost 40% of its activity [39].…”

Section: D and 3d Doped-carbon Electrocatalystsmentioning

confidence: 99%

“…However, they differ in their kinetic current values: the 3D nanosheets Co 3 O 4 -doped-graphene [38] exhibited a kinetic current density of 34 mA·cm −2 at 0.75 V vs. RHE, while the 3D-structured Co-N-doped highly ordered macro-mesoporous carbon of 23.2 mA·cm −2 . [38], [29], [27], [41], [28], [40], [35], [39], [34]). …”

Section: D and 3d Doped-carbon Electrocatalystsmentioning

confidence: 99%

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Non-Precious Electrocatalysts for Oxygen Reduction Reaction in Alkaline Media: Latest Achievements on Novel Carbon Materials

et al. 2016

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Low temperature fuel cells (LTFCs) are considered as clean energy conversion systems and expected to help address our society energy and environmental problems. Up-to-date, oxygen reduction reaction (ORR) is one of the main hindering factors for the commercialization of LTFCs, because of its slow kinetics and high overpotential, causing major voltage loss and short-term stability. To provide enhanced activity and minimize loss, precious metal catalysts (containing expensive and scarcely available platinum) are used in abundance as cathode materials. Moreover, research is devoted to reduce the cost associated with Pt based cathode catalysts, by identifying and developing Pt-free alternatives. However, so far none of them has provided acceptable performance and durability with respect to Pt electrocatalysts. By adopting new preparation strategies and by enhancing and exploiting synergetic and multifunctional effects, some elements such as transition metals supported on highly porous carbons have exhibited reasonable electrocatalytic activity. This review mainly focuses on the very recent progress of novel carbon based materials for ORR, including: (i) development of three-dimensional structures; (ii) synthesis of novel hybrid (metal oxide-nitrogen-carbon) electrocatalysts; (iii) use of alternative raw precursors characterized from three-dimensional structure; and (iv) the co-doping methods adoption for novel metal-nitrogen-doped-carbon electrocatalysts. Among the examined materials, reduced graphene oxide-based hybrid electrocatalysts exhibit both excellent activity and long term stability.

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CuCo Hybrid Oxides as Bifunctional Electrocatalyst for Efficient Water Splitting

Kuang

Han

Wang

et al. 2016

Adv Funct Materials

267

163

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Solar-driven water splitting is a promising approach for renewable energy, where the development of efficient and stable bifunctional electrocatalysts for simultaneously producing hydrogen and oxygen is still challenging. Herein, combined with the hydrogen evolution reaction (HER) activity of a copper(I) complex and oxygen evolution reaction (OER) activity of cobalt-based oxides, a type of 1D copper-cobalt hybrid oxide nanowires (CuCoO-NWs) is developed via a facile two-step growth-conversion process toward a bifunctional water splitting catalyst. The CuCoO-NWs exhibit excellent catalytic performances for both HER and OER in the same basic electrolyte, with optimized low onset overpotentials and high current densities. The efficient HER activity is ascribed to the formation of Cu 2 O, while the activity for OER is primarily enabled by Co-based oxides and abundant oxygen vacancies. The CuCoO-NWs allow for the assembly of a water electrolyzer with strong alkaline media, with a current density of 10 mA cm −2 at 1.61 V. Further combination with a commercial silicon photovoltaic allows the direct use of solar energy for spontaneous water splitting with excellent stability for over 72 h, suggesting the potential as a promising bifunctional electrocatalyst for efficient solar-driven water splitting.

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Directed Growth of Metal‐Organic Frameworks and Their Derived Carbon‐Based Network for Efficient Electrocatalytic Oxygen Reduction

Cited by 465 publications

References 52 publications

Design Strategies toward Advanced MOF‐Derived Electrocatalysts for Energy‐Conversion Reactions

Design Strategies toward Advanced MOF‐Derived Electrocatalysts for Energy‐Conversion Reactions

Non-Precious Electrocatalysts for Oxygen Reduction Reaction in Alkaline Media: Latest Achievements on Novel Carbon Materials

CuCo Hybrid Oxides as Bifunctional Electrocatalyst for Efficient Water Splitting

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