3D Co-N-doped hollow carbon spheres as excellent bifunctional electrocatalysts for oxygen reduction reaction and oxygen evolution reaction

Cai, Shichang; Meng, Zihan; Tang, Haolin; Wang, Yi; Tsiakaras, Panagiotis

doi:10.1016/j.apcatb.2017.06.008

Cited by 222 publications

(101 citation statements)

References 51 publications

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“…For C1si nF igure 2a,t he peaks located at 284. [19] Graphitic Na nd pyridinic Na ct as active sites for ORR and possessl one-pair electrons that can coordinate with metals to form MÀNs pecies. [18] The peaks at 398.2, 399.8, 401.1, and 402.2 eV for N1sa re ascribed to pyridinic N, pyrrolic N, graphitic N, and oxidizedN ,r espectively.…”

Section: Resultsmentioning

confidence: 99%

Cobalt–Tannin‐Framework‐Derived Amorphous Co−P/Co−N−C on N, P Co‐Doped Porous Carbon with Abundant Active Moieties for Efficient Oxygen Reactions and Water Splitting

et al. 2019

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It remains a tremendous challenge to develop a low‐cost, earth‐abundant, and efficient catalyst with multifunctional activities for the hydrogen evolution reaction (HER), oxygen evolution reaction (OER), and oxygen reduction reaction (ORR). Herein, a facile and scalable avenue was developed to prepare amorphous Co−P/Co−N−C supported on N, P co‐doped porous carbon (Co−P/Co−N−C/NPC) with a large specific surface area (1462.9 m2 g−1) and abundant reactive sites including Co−P, Co−N and NPC. The prepared electrocatalyst exhibits outstanding catalytic performance for HER (η=234 mV at 10 mA cm−2), OER (η=374 mV at 10 mA cm−2), and ORR (E1/2=0.89 V, vs. reversible hydrogen electrode). Benefiting from the excellent HER performance and outstanding OER activity, the Co−P/Co−N−C/NPC delivers a current density of 10 mA cm−2 for overall water splitting at a cell voltage of 1.59 V, which is comparable with the IrO2–Pt/C couple electrode.

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Section: Resultsmentioning

confidence: 99%

Cobalt–Tannin‐Framework‐Derived Amorphous Co−P/Co−N−C on N, P Co‐Doped Porous Carbon with Abundant Active Moieties for Efficient Oxygen Reactions and Water Splitting

et al. 2019

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“…[79] Notably,d uring the OER process, Ni nanoparticles can facilitate ar eaction through the formation of Ni oxide, which acts as actives ites, and Co achieves the same goal by forming Co-N x . [81] Fortunately, upon forming alloys with Ni or Co, the minimum level of the DOS of the active Ca toms improves, and this leads to improvede lectrocatalytic activity. [81] Fortunately, upon forming alloys with Ni or Co, the minimum level of the DOS of the active Ca toms improves, and this leads to improvede lectrocatalytic activity.…”

Section: Heterojunction Strategies For the Oermentioning

confidence: 99%

“…[82c, 108] Ni [79] and Co [9,81,95,109] nanoparticles and alloys [110] are common materials with efficient electrocatalytic activities for the HER. Its alloys with Ni and Co still exhibit excellent electrocatalytic performance in the HER.…”

Section: Heterojunction Strategies For the Hermentioning

confidence: 99%

Stable and Efficient Nitrogen‐Containing Carbon‐Based Electrocatalysts for Reactions in Energy‐Conversion Systems

et al. 2018

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High activity and stability are crucial for the practical use of electrocatalysts in fuel cells, metal-air batteries, and water electrolysis, including the oxygen reduction reaction, hydrogen evolution reaction, oxygen evolution reaction, and oxidation reactions of formic acid and alcohols. Electrocatalysts based on nitrogen-containing carbon (N-C) materials show promise in catalyzing these reactions; however, there is no systematic review of strategies for the engineering of active and stable N-C-based electrocatalysts. Herein, a comprehensive comparison of recently reported N-C-based electrocatalysts regarding both electrocatalytic activity and long-term stability is presented. In the first part of this review, the relationships between the electrocatalytic reactions and selection of the element to modify the N-C-based materials are discussed. Afterwards, synthesis methods for N-C-based electrocatalysts are summarized, and strategies for the synthesis of highly stable N-C-based electrocatalysts are presented. Multiple tables containing data on crucial parameters for both electrocatalytic activity and stability are displayed in this review. Finally, constructing M-N moieties is proposed as the most promising engineering strategy for stable N-C-based electrocatalysts.

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“…[1][2][3][4][5][6] Among these nonprecious metal catalysts, nitrogen and transition metal co-doped carbons (M/NÀ C, M = transition metals, Fe or Co in most case) had gained increasing concern because of their high ORR electrocatalytic activity, excellent stability, and economic advantage. [1][2][3][4][5][6] Among these nonprecious metal catalysts, nitrogen and transition metal co-doped carbons (M/NÀ C, M = transition metals, Fe or Co in most case) had gained increasing concern because of their high ORR electrocatalytic activity, excellent stability, and economic advantage.…”

Section: Introductionmentioning

confidence: 99%

Nitrogen/Cobalt Co‐doped Mesoporous Carbon Microspheres Derived from Amorphous Metal‐Organic Frameworks as a Catalyst for the Oxygen Reduction Reaction in Both Alkaline and Acidic Electrolytes

Bai

Yang

et al. 2019

ChemElectroChem

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Nitrogen/cobalt co-doped carbon (Co/NÀ C) catalysts are the best candidates to replace their Fe-based analogues for the oxygen reduction reaction (ORR) in proton exchange membrane fuel cells (PEMFCs), owing to the absence of radical-induced PEMFC membrane/ionomer degradations that are commonly encountered in the Fe/NÀ C system. Herein, we present an amorphous Co-metal organic framework (MOF) route for the fabrication of N/Co co-doped mesoporous carbon spheres by directly pyrolyzing amorphous Co-MOF microspheres. The assynthesized Co/NÀ C-800 catalyst (heat-treated at 800°C) has a unique spherical architecture with short nanotubes on its surface and simultaneously possesses a relatively large Brunauer-Emmett-Teller surface area (381 m 2 g À 1 ) and a high N content (4.95 at%). Owing to these benefits, the Co/NÀ C-800 catalyst displays good ORR performance in both alkaline and acidic electrolytes, that is, the ORR onset potential (E o ), halfwave potential (E 1/2 ), and current density at 0.4 V (vs. RHE, J @0.4 ) are 0.981 V (vs. RHE), 0.872 V (vs. RHE), and 5.47 mA cm À 2 , respectively, in alkaline media, and 0.863 V (vs. RHE), 0.707 V (vs. RHE), and 5.29 mA cm À 2 , respectively, in acidic electrolyte. More importantly, the Co/NÀ C-800 catalyst also exhibits excellent poison tolerance in acidic electrolytes.

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3D Co-N-doped hollow carbon spheres as excellent bifunctional electrocatalysts for oxygen reduction reaction and oxygen evolution reaction

Cited by 222 publications

References 51 publications

Cobalt–Tannin‐Framework‐Derived Amorphous Co−P/Co−N−C on N, P Co‐Doped Porous Carbon with Abundant Active Moieties for Efficient Oxygen Reactions and Water Splitting

Cobalt–Tannin‐Framework‐Derived Amorphous Co−P/Co−N−C on N, P Co‐Doped Porous Carbon with Abundant Active Moieties for Efficient Oxygen Reactions and Water Splitting

Stable and Efficient Nitrogen‐Containing Carbon‐Based Electrocatalysts for Reactions in Energy‐Conversion Systems

Nitrogen/Cobalt Co‐doped Mesoporous Carbon Microspheres Derived from Amorphous Metal‐Organic Frameworks as a Catalyst for the Oxygen Reduction Reaction in Both Alkaline and Acidic Electrolytes

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