2020
DOI: 10.1002/advs.202000407
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Fe3O4@N‐Doped Interconnected Hierarchical Porous Carbon and Its 3D Integrated Electrode for Oxygen Reduction in Acidic Media

Abstract: The rational design of electrode structure with catalysts adequately utilized is of vital importance for future fuel cells. Herein, a novel 3D oriented wholly integrated electrode comprising core–shell Fe 3 O 4 @N‐doped‐C (Fe 3 O 4 @NC) nanoparticles embedded into N‐doped ordered interconnected hierarchical porous carbon (denoted as Fe 3 O 4 @NC/NHPC) is developed for the ox… Show more

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Cited by 55 publications
(35 citation statements)
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“…In addition, the presence of Fe-N demonstrates the interaction between the Fe3O4 nanoparticles and the N-doped graphene. In the spectrum of Fe 2p in Figure 4c, there are two characteristic peaks at 711.45 and 724.8 eV corresponding to the Fe 2p3/2 and Fe 2p1/2 units of Fe3O4, respectively [31,32]. The absence of satellite peaks demonstrates that the Fe species is present as Fe3O4 in the catalyst [14,24,32].…”
Section: Resultsmentioning
confidence: 94%
“…In addition, the presence of Fe-N demonstrates the interaction between the Fe3O4 nanoparticles and the N-doped graphene. In the spectrum of Fe 2p in Figure 4c, there are two characteristic peaks at 711.45 and 724.8 eV corresponding to the Fe 2p3/2 and Fe 2p1/2 units of Fe3O4, respectively [31,32]. The absence of satellite peaks demonstrates that the Fe species is present as Fe3O4 in the catalyst [14,24,32].…”
Section: Resultsmentioning
confidence: 94%
“…After the poisoning test, the ORR activity of NC‐950 did not decrease, signifying that the effect of a single Zn species on ORR activity was negligible (Figure S13). According to previous reports, the composite of Fe 3 O 4 and N‐doped carbon materials was an effective way to prepare catalysts with high oxygen reduction activity 72,78 . The Fe 3 O 4 leaching experiment of Fe‐NC‐950 was performed by soaking in 5 M hydrochloric acid, as shown in Figure S14.…”
Section: Resultsmentioning
confidence: 99%
“…According to previous reports, the composite of Fe 3 O 4 and N-doped carbon materials was an effective way to prepare catalysts with high oxygen reduction activity. 72,78 The Fe 3 O 4 leaching experiment of Fe-NC-950 was performed by soaking in 5 M hydrochloric acid, as shown in Figure S14. When the Fe 3 O 4 moieties were removed (XRD pattern in Figure S7), the E 1/2 negatively shifted 0.20 V of Fe-NC-950.…”
Section: Electrochemical Evaluation For Orrmentioning
confidence: 99%
“…Special 3D hierarchical structure could also have synergy effect for ORR catalytic process. Song et al [141] reported a 3D oriented electrode comprising core-shell Fe 3 O 4 @N-doped-C (Fe 3 O 4 @NC) nanoparticles embedded into N-doped ordered interconnected hierarchical porous carbon (Figure 7(d)). Due to the optimization of mass transfer and active site exposure, the electrocatalysts exhibit good ORR activity.…”
Section: Synergy Effect From Hierarchical Structurementioning
confidence: 99%
“…As well known in PEMFC system, all constituent parts could be divided into four parts: current collectors [141], gas channels [142], air electrodes [143] and proton exchange membrane [144]. For the function of each part, the current collectors are used for electron transfer between electrochemical reaction and external circuit [145].…”
Section: Local Structure Engineering For Electrodesmentioning
confidence: 99%