Nitrogen-doped graphene-supported cobalt carbonitride@oxide core–shell nanoparticles as a non-noble metal electrocatalyst for an oxygen reduction reaction

Wu, Yingsi; Shi, Qianqian; Li, Yuhang; Lai, Zhuangchai; Yu, Hao; Wang, Hongjuan

doi:10.1039/c4ta03850a

Cited by 54 publications

(30 citation statements)

References 60 publications

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“…These include (I) gas sensor by B dopant [25], transistor by B dopant [94], N dopant [40,41], NO2 dopant [69]; (II) biosensor by N dopant [86]; (III) solar cell by HNO3 dopant [51,52], SoCl2 dopant [50,51], B dopant [26], HCl dopant [51], H2O2 dopant [51]; (IV) fuel cell by B dopant [27], N dopant [38,96]; (V) Li-ion battery by SnO2/N codopant [35], MoS2/N co-dopant [36], O2 dopant [84]; (VI) supercapacitor by N dopant [39]; (VII) FET by N dopant [44,88], diazonium salt and PEI dopants [74], NH3 dopant [73], N2H4 dopant [61,62], oMeO-DMBI dopant [63]; (VIII) photovoltaic cells by AuCl3 dopant [29]; electrocatalyst for ORR by S/N co-dopant [34], FeN4 dopant [32], N dopant [37,89], P dopant [79,80], N2/P co-dopant [76]; (IX) PLED by TFSA dopant [48]; (X) Free-radical scavenging by P dopant [77]; and (XI) energy storage and conversion by S dopant [33]. In general, the doped-graphene exhibited the diverse potentials with physical and chemical characteristics in further improvement the unexploited and unexplored potential in graphene.…”

Section: Applications Of Doped-graphenesmentioning

confidence: 99%

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A Library of Doped-Graphene Images via Transmission Electron Microscopy

Pham

2018

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Much recent work has focused on improving the performance of graphene by various physical and chemical modification approaches. In particular, chemical doping of n-type and p-type dopants through substitutional and surface transfer strategies have been carried out with the aim of electronic and band-gap tuning. In this field, the visualization of (i) The intrinsic structure and morphology of graphene layers after doping by various chemical dopants, (ii) the formation of exotic and new chemical bonds at surface/interface between the graphene layers and the dopants is highly desirable. In this short review, recent advances in the study of doped-graphenes and of the n-type and p-type doping techniques through transmission electron microscopy (TEM) analysis and observation at the nanoscale will be addressed.

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Section: Applications Of Doped-graphenesmentioning

confidence: 99%

“…As the result, it showed the improved catalytic activity in ORR. In 2015, a new catalyst was discovered for ORR by Wu et al (Figure 11a-k) [89]. It based on N-doped graphene and additional supported by CoCN@CoO x as a superior non-noble metal electrocatalyst for ORR.…”

Section: Introductionmentioning

confidence: 99%

A Library of Doped-Graphene Images via Transmission Electron Microscopy

Pham

2018

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“…Among the examined hybrid electrocatalysts, the mesoporous hybrid shell of carbonized polyaniline Mn 2 O 3 (C PANI /Mn 2 O 3 ) [59] and the CoCN(carbonnitirde)@CoO x supported on the graphene maintained more than 90% of their initial activity for about 20 h of operation [54]; both electrocatalysts have mesoporous core-shell structure offering more active sites and mass transfer. Thus, the strategy of intervening in carbon nanostructure by deliberately introducing in its main structure metal-organic frameworks develops hybrid materials/electrocatalysts.…”

Section: Hybrid (Metal Oxide-nitrogen-carbon) Electrocatalystsmentioning

confidence: 99%

“…A new hybrid catalyst in the form of core-shell type, CoCN(carbonnitirde)@CoO x NPs, supported on N-doped graphene was designed for the ORR in an alkaline solution [54]. The oxide 2 nm thin layer (CoO x ) played a protective role preventing the oxidation corrosion of CoCN.…”

Section: Hybrid (Metal Oxide-nitrogen-carbon) Electrocatalystsmentioning

confidence: 99%

“…Its excellent activity was mainly attributed to the following factors: (i) the doping effect of N and Co; (ii) the porous structure; and (iii) the good contact between N/Co-doped carbon polyhedron and nitrogen-doped reduced graphene oxide. Catalysts 2016, 6, 159 9 of 22 [58], [53], [55], [56], [49], [47], [50], [51], [59], [54], [57], [48], [52]). …”

Section: Hybrid (Metal Oxide-nitrogen-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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Pyridinic‐Nitrogen‐Dominated Graphene Aerogels with Fe–N–C Coordination for Highly Efficient Oxygen Reduction Reaction

Cui

Yang

Yan

et al. 2016

Adv Funct Materials

379

206

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Here, pyridinic nitrogen dominated graphene aerogels with/without iron incorporation (Fe‐NG and NG) are prepared via a facile and effective process including freeze‐drying of chemically reduced graphene oxide with/without iron precursor and thermal treatment in NH3. A high doping level of nitrogen has been achieved (up to 12.2 at% for NG and 11.3 at% for Fe‐NG) with striking enrichment of pyridinic nitrogen (up to 90.4% of the total nitrogen content for NG, and 82.4% for Fe‐NG). It is found that the Fe‐NG catalysts display a more positive onset potential, higher current density, and better four‐electron selectivity for ORR than their counterpart without iron incorporation. The most active Fe‐NG exhibits outstanding ORR catalytic activity, high durability, and methanol tolerance ability that are comparable to or even superior to those of the commercial Pt/C catalyst at the same catalyst loading in alkaline environment. The excellent ORR performance can be ascribed to the synergistic effect of pyridinic N and Fe‐N x sites (where iron probably coordinates with pyridinic N) that serve as active centers for ORR. Our Fe‐NG can be developed into cost‐effective and durable catalysts as viable replacements of the expensive Pt‐based catalysts in practical fuel cell applications.

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Nitrogen-doped graphene-supported cobalt carbonitride@oxide core–shell nanoparticles as a non-noble metal electrocatalyst for an oxygen reduction reaction

Abstract: Cobalt carbonitride@oxide core–shell nanoparticles supported on nitrogen-doped graphene present excellent activity in ORR, benefiting from the electronic modification of cobalt oxide by carbonitride from within.

Cited by 54 publications

References 60 publications

A Library of Doped-Graphene Images via Transmission Electron Microscopy

A Library of Doped-Graphene Images via Transmission Electron Microscopy

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

Pyridinic‐Nitrogen‐Dominated Graphene Aerogels with Fe–N–C Coordination for Highly Efficient Oxygen Reduction Reaction

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