A Unique Synthesis of Macroporous N-Doped Carbon Composite Catalyst for Oxygen Reduction Reaction

Karunagaran, Ramesh; Tran, Diana; Tùng, Trần Thanh; Shearer, Cameron J.; Lošić, Dušan

doi:10.3390/nano11010043

Cited by 3 publications

(2 citation statements)

References 64 publications

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“…Organized macroporous arrays should exhibit optimal fluxes, and diffusion should not be a limiting problem. This is a key issue for all processes where accessibility is crucial, for instance, delivery, sensing, catalysis, and sorption [40].…”

Section: Classification Based On Porositymentioning

confidence: 99%

Nanoparticle and Nanostructure Synthesis and Controlled Growth Methods

et al. 2022

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Nanomaterials are materials with one or more nanoscale dimensions (internal or external) (i.e., 1 to 100 nm). The nanomaterial shape, size, porosity, surface chemistry, and composition are controlled at the nanoscale, and this offers interesting properties compared with bulk materials. This review describes how nanomaterials are classified, their fabrication, functionalization techniques, and growth-controlled mechanisms. First, the history of nanomaterials is summarized and then the different classification methods, based on their dimensionality (0–3D), composition (carbon, inorganic, organic, and hybrids), origin (natural, incidental, engineered, bioinspired), crystal phase (single phase, multiphase), and dispersion state (dispersed or aggregated), are presented. Then, the synthesis methods are discussed and classified in function of the starting material (bottom-up and top-down), reaction phase (gas, plasma, liquid, and solid), and nature of the dispersing forces (mechanical, physical, chemical, physicochemical, and biological). Finally, the challenges in synthesizing nanomaterials for research and commercial use are highlighted.

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Section: Classification Based On Porositymentioning

confidence: 99%

Nanoparticle and Nanostructure Synthesis and Controlled Growth Methods

et al. 2022

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“…Therefore, the major focus has been to reduce the amount of platinum used in the cathode. Development of Pt-based alloys, low-loadings of platinum, modifications of the support, and alternative metal catalysts have been considered [10][11][12][13][14]. For example, alloys of noble metals (Pt, Pd) and transition metals (Cu, Co) have been widely studied [15][16][17][18][19].…”

Section: Introductionmentioning

confidence: 99%

Pore Modification and Phosphorus Doping Effect on Phosphoric Acid-Activated Fe-N-C for Alkaline Oxygen Reduction Reaction

2021

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The price and scarcity of platinum has driven up the demand for non-precious metal catalysts such as Fe-N-C. In this study, the effects of phosphoric acid (PA) activation and phosphorus doping were investigated using Fe-N-C catalysts prepared using SBA-15 as a sacrificial template. The physical and structural changes caused by the addition of PA were analyzed by nitrogen adsorption/desorption and X-ray diffraction. Analysis of the electronic states of Fe, N, and P were conducted by X-ray photoelectron spectroscopy. The amount and size of micropores varied depending on the PA content, with changes in pore structure observed using 0.066 g of PA. The electronic states of Fe and N did not change significantly after treatment with PA, and P was mainly found in states bonded to oxygen or carbon. When 0.135 g of PA was introduced per 1 g of silica, a catalytic activity which was increased slightly by 10 mV at −3 mA/cm2 was observed. A change in Fe-N-C stability was also observed through the introduction of PA.

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Cobalt Nanoparticles Embedded into Nitrogen‐doped Graphene with Abundant Macropores as a Bifunctional Electrocatalyst for Rechargeable Zinc‐air Batteries

Wang

Chen

Sun

et al. 2022

Chemistry An Asian Journal

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Nitrogen doped carbon materials containing transition metal nanoparticles have attracted much attention as bifunctional oxygen electrocatalysts. In this paper, the template etching method is used to obtain the nitrogendoped graphene with abundant macropores embedded with cobalt nanoparticles (Co@NÀ C). The prepared Co@NC-800 catalyst has a half-wave potential (E 1/2 = 0.835 V) close to Pt/C and good stability in excess of Pt/C for oxygen reduction reaction (ORR). At the same time, the catalyst has good oxygen evolution reaction (OER) performance. In addition, zinc-air batteries (ZABs) based on the Co@NC-800 catalyst show good cycle stability of up to 200000 s and high power density of 73.5 mW cm À 2 . The synergistic effect of the integrated component between nitrogen-doped graphene and cobalt nanoparticles as well as the macroporous structure endow Co@NC-800 with abundant exposed active sites and mass/electron transfer capacity, thus leading to the high electrocatalytic activity. This work shows potential for practical applications in electrochemistry.

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A Unique Synthesis of Macroporous N-Doped Carbon Composite Catalyst for Oxygen Reduction Reaction

Cited by 3 publications

References 64 publications

Nanoparticle and Nanostructure Synthesis and Controlled Growth Methods

Nanoparticle and Nanostructure Synthesis and Controlled Growth Methods

Pore Modification and Phosphorus Doping Effect on Phosphoric Acid-Activated Fe-N-C for Alkaline Oxygen Reduction Reaction

Cobalt Nanoparticles Embedded into Nitrogen‐doped Graphene with Abundant Macropores as a Bifunctional Electrocatalyst for Rechargeable Zinc‐air Batteries

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