Three‐Dimensional Smart Catalyst Electrode for Oxygen Evolution Reaction

Chen, Sheng; Duan, Jingjing; Bian, Pengju; Tang, Youhong; Zheng, Rongkun; Qiao, Shi Zhang

doi:10.1002/aenm.201500936

Cited by 178 publications

(131 citation statements)

References 36 publications

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“…The NGM electrode exhibits a current density of ≈6.0 mA cm −2 and a peak power density of ≈3.0 mW cm −2 , comparable to those of a Pt/C electrode and better than some previous works. [ 54 ] This prototype demonstration without any optimization proves the potential application of such metal-free nanocarbon catalysts for Zn-air batteries.…”

Section: Communicationmentioning

confidence: 70%

“…[ 3 ] Furthermore, primary Zn-air batteries were constructed to investigate the practical application of as-obtained metal-free catalysts. [ 53,54 ] The catalysts were uniformly loaded onto carbon fi ber paper (CFP) with a loading of ≈0.8 mg cm −2 as the cathode, and a Zn foil was paired in 6.0 M KOH as anode. A high open circuit voltage about 1.42 V is achieved for the NGM-based batteries (Figure 5 b).…”

Section: Communicationmentioning

confidence: 99%

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Topological Defects in Metal‐Free Nanocarbon for Oxygen Electrocatalysis

et al. 2016

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A bifunctional graphene catalyst with abundant topological defects is achieved via the carbonization of natural gelatinized sticky rice to probe the underlying oxygen electrocatalytic mechanism. A nitrogen-free configuration with adjacent pentagon and heptagon carbon rings is revealed to exhibit the lowest overpotential for both oxygen reduction and evolution catalysis. The versatile synthetic strategy and novel insights on the activity origin facilitate the development of advanced metal-free carbocatalysts for a wide range of electrocatalytic applications.

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Section: Communicationmentioning

confidence: 70%

Section: Communicationmentioning

confidence: 99%

Topological Defects in Metal‐Free Nanocarbon for Oxygen Electrocatalysis

et al. 2016

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“…[9] Recent reports also demonstrate that N-related species are active for OER. [5,[48][49][50][51][52][53] In this work, the catalysts include both N-and metal-based species. [5,[48][49][50][51][52][53] In this work, the catalysts include both N-and metal-based species.…”

Section: Further Discussion On Electrocatalytic Activity and Vital Romentioning

confidence: 99%

MO‐Co@N‐Doped Carbon (M = Zn or Co): Vital Roles of Inactive Zn and Highly Efficient Activity toward Oxygen Reduction/Evolution Reactions for Rechargeable Zn–Air Battery

Yin

Wang

et al. 2017

Adv Funct Materials

241

140

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A highly efficient bifunctional oxygen catalyst is required for practical applications of fuel cells and metal-air batteries, as oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) are their core electrode reactions. Here, the MO-Co@N-doped carbon (NC, M = Zn or Co) is developed as a highly active ORR/OER bifunctional catalyst via pyrolysis of a bimetal metal-organic framework containing Zn and Co, i.e., precursor (CoZn). The vital roles of inactive Zn in developing highly active bifunctional oxygen catalysts are unraveled. When the precursors include Zn, the surface contents of pyridinic N for ORR and the surface contents of Co-N x and Co 3+ /Co 2+ ratios for OER are enhanced, while the high specific surface areas, high porosity, and high electrochemical active surface areas are also achieved. Furthermore, the synergistic effects between Zn-based and Co-based species can promote the well growth of multiwalled carbon nanotubes (MWCNTs) at high pyrolysis temperatures (≥700 °C), which is favorable for charge transfer. The optimized CoZn-NC-700 shows the highly bifunctional ORR/OER activity and the excellent durability during the ORR/OER processes, even better than 20 wt% Pt/C (for ORR) and IrO 2 (for OER). CoZn-NC-700 also exhibits the prominent Znair battery performance and even outperforms the mixture of 20 wt% Pt/C and IrO 2 .

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“…[1,2] Undoubtedly, the broad application of green energy instead of fossil fuels will be a key avenue to realize the goal of a low-carbon economy, and it has become a crucial part of the fight against climate change. [3][4][5][6] However, most renewable energy is intermittent and cannot meet casual demands.…”

Section: Introductionmentioning

confidence: 99%

Macroscopic‐Scale Three‐Dimensional Carbon Nanofiber Architectures for Electrochemical Energy Storage Devices

Chen

Feng

Liang

et al. 2017

Advanced Energy Materials

170

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Therefore, it is necessary to develop highperformance energy storage devices for facilitating the effective utilization of intermittent renewable energy sources. [7][8][9] Among varieties of electrochemical energy storage devices, supercapacitors (known as electrochemical capacitors) [10,11] and some rechargeable batteries (lithium-ion batteries (LIBs), lithiumsulfur (Li-S) batteries, and metal-O 2 batteries) [12][13][14][15] are at the frontier, because they can transport high power and store high energy. Nowadays, they play an indispensable role in our daily life by powering numerous portable electronic devices (e.g., cell phones and laptops), hybrid electric vehicles, and large-scale electrical grids. [16][17][18][19] It is well accepted that the performance of energy storage devices mainly depended on their electrode materials. [20,21] Owing to the advantages of large surface area, light weight, good electrical conductivity, and high thermal/ chemical stability, carbon materials have been considered as the most important electrode materials of supercapacitors and rechargeable batteries [8,20,21] Hence, various nanostructured carbons, such as carbon/graphene quantum dots, [22,23] carbon nanofiber (CNFs), [16,24] carbon nanotubes (CNTs), [13,25] graphene [26][27][28][29][30][31][32] carbon nanosheets, [33,34] 3D carbon nanostructures, [35][36][37] and porous carbon, [38,39] have gained great attention. Among these materials, 3D carbon nanomaterials have some advantages. The interlinked architecture not only shortens transport distances for ions in the well-interconnected wall structure, but also provides a continuous pathway endowing for the fast electron transport. [40] Moreover, the structural interconnectivities guarantee higher electrical conductivity and better mechanical stability. [36,41] Thereby, the design and fabrication of various 3D carbonbased nanostructures, including carbon nanotube networks, graphene gels, graphene foams, and 3D CNFs, have been intensively investigated.Over the past few years, there are many reviews summarizing the progress of fabricating 3D carbon-based nanomaterials. For example, Schneider et al. overviewed the recent advance in the synthesis of 3D arranged carbon nanotube architectures. [42] Li et al. reviewed the carbon-based 3D nanostructures for supercapacitors. [36] Cao and Gui et al. comprehensively reviewed the recent progress in synthesis, properties, and energy applications of CNT sponges, aerogels, and hierarchical composites. [43] The development of high-performance electrochemical energy storage devices is critical for addressing energy crises and environmental pollution.

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Three‐Dimensional Smart Catalyst Electrode for Oxygen Evolution Reaction

Cited by 178 publications

References 36 publications

Topological Defects in Metal‐Free Nanocarbon for Oxygen Electrocatalysis

Topological Defects in Metal‐Free Nanocarbon for Oxygen Electrocatalysis

MO‐Co@N‐Doped Carbon (M = Zn or Co): Vital Roles of Inactive Zn and Highly Efficient Activity toward Oxygen Reduction/Evolution Reactions for Rechargeable Zn–Air Battery

Macroscopic‐Scale Three‐Dimensional Carbon Nanofiber Architectures for Electrochemical Energy Storage Devices

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