N-, O- and P-doped hollow carbons: Metal-free bifunctional electrocatalysts for hydrogen evolution and oxygen reduction reactions

Huang, Senchuan; Meng, Yuying; Cao, Yangfei; He, Shan; Li, Xiaohui; Tong, Shengfu; Wu, Mingmei

doi:10.1016/j.apcatb.2019.01.080

Cited by 150 publications

(53 citation statements)

References 53 publications

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“…Until now, some common carbon materials doped with phosphorus have attracted the attention of researchers . Due to the larger radius of the phosphorus atom, it is usually grafted on the surface or edge of carbon materials to change the geometry and electronic structure of the carbon material during the doping process.…”

Section: Introductionmentioning

confidence: 99%

“…39 Until now, some common carbon materials doped with phosphorus have attracted the attention of researchers. [40][41][42][43] Due to the larger radius of the phosphorus atom, it is usually grafted on the surface or edge of carbon materials to change the geometry and electronic structure of the carbon material during the doping process. The defective structure on the surface of carbon layer improves electrical conductivity, which is served as promising catalytic for ORR reaction in the fuel cells.…”

Section: Introductionmentioning

confidence: 99%

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High‐performance N, P‐CNL nanocomposites as catalyst for oxygen reduction reaction in fuel cell

et al. 2020

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Summary Transition metal and heteroatom codoped carbon materials have become the most promising materials to replace commercial platinum carbon (Pt / C) catalysts due to their low cost, high stability, and methanol resistance. In this work, iron‐nitrogen and phosphorus codoped carbon nanorod‐layer composites (N, P‐CNL) derived from phosphorus‐doped polyaniline (P‐PANI) by phytic acid (PA) and iron salt were successfully obtained after high‐temperature pyrolysis. As a result, the N, P‐CNL materials exhibited good electrocatalytic performance due to abundant active sites. The N, P‐CNL with 50% mass filling ratio of iron salt (named as N, P‐CNL‐1:1) displayed an enhanced limiting current density of −5.97 mA cm−2 at 1600 rpm and outstanding onset potential (−0.004 V) and oxygen reduction peak potential (−0.144 V). In general, this work can give insights into understanding the mechanism of codoped catalysts and synthesis the catalyst with excellent long‐term stability and resistance to methanol crossover and poisoning better than commercial Pt/C.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

High‐performance N, P‐CNL nanocomposites as catalyst for oxygen reduction reaction in fuel cell

et al. 2020

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“…[18] Recently, heteroatom (such as N, S, P, and B atoms)-doped carbons including nanotubes, graphene and active carbon have raised attention for efficient alternatives to Pt-based catalysts. [19][20][21][22][23] Therefore, a promising strategy is to embed NPs of transition metal into the heteroatom-doped carbons to improve both catalytic activity and durability.…”

Section: Introductionmentioning

confidence: 99%

Optimization of Catalytic Sites in Cobalt‐Modified Nitrogen‐Doped Carbon towards High‐Performance Oxygen Reduction Electrocatalysts for Zinc‐Air Batteries

Xue

Wei

et al. 2019

ChemElectroChem

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Efficient yet low-cost electrocatalysts for the oxygen reduction reaction (ORR) are highly desirable for energy systems such as metal-air batteries and fuel cells. Herein, we report the synthesis of efficient cobalt-modified nitrogen-doped carbon (NÀ C/Co) electrocatalysts by using a one-pot pyrolysis. The abundant source of N in g-C 3 N 4 contributes to the in situ N doping in the carbon matrix, which favors the formation of Co-related catalytic active sites. The NÀ C/Co-1 (prepared with 1 mmol Co salt) sample exhibits the best performance towards the ORR, with a positive half-wave potential of 0.86 V (vs. the reversible hydrogen electrode, RHE), high stability and excellent methanol tolerance, which outperforms the commercial Pt/C catalyst. We find that the high performance is dependent on the optimal content of Co that can achieve the maximum amount of CoÀ N x catalytic species. In addition, we reveal that the size effect of Co nanoparticles is not the determining factor for the ORR activity in the current system, as the kinetics of the ORR reaction is dominantly determined by the active sites derived from CoÀ N x species. By exploiting the NÀ C/Co-1 sample as an air cathode catalyst, the assembled Zn-air battery presents a maximal power density of 153 mW cm À 2 as well as good durability during continuous cycle tests.

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“…To overcome this obstacle, rational design and preparation of electrocatalysts with low‐cost, high efficiency and stability by using earth abundant materials is desirable but challenging. Among them, the Fe‐, Co‐, Ni‐, Mn‐based oxides, sulfides, nitrides and phosphides have been extensively studied because of their high catalytic activity and natural abundance.…”

Section: Introductionmentioning

confidence: 99%

Cobalt Nanoparticles Embedded in N, S Co‐Doped Carbon towards Oxygen Reduction Reaction Derived by in situ Reducing Cobalt Sulfide

Dong

Zhang

et al. 2019

ChemCatChem

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Herein, a novel electrocatalysts of cobalt nanoparticles embedded in N, S co-doped carbon matrix derived by in situ reducing Co 9 S 8 are designed and prepared successfully through two-calcination methods, and applied for oxygen reduction reaction (ORR). Due to the large surface area and pore volume, richness of defects existing the carbon nanotubes, interaction of S species and N species and special direction of electron transfers between Co and S ions, the earth-abundant and lowcost CoSMe-0.5-800 presents a highly efficient ORR activity and stability. The onset potential, half-wave potential and limiting current density of CoSMe-0.5-800 are 0.95 V, 0.85 V, and 4.31 mA cm À 2 , which are higher than that of commercial Pt/C (0.93 V, 0.83 V, 4.19 mA cm À 2 ). More importantly, the interaction between N and S heteroatoms in system gets revealed, that S resources can help to improve the degree of N doping and raise the ratio of pyridinic N species working as the active site for ORR. With the increase of S resources, electrons that should have been transferred from cobalt to sulfur have moved in the opposite direction, which has a negative effect on ORR active performance. This work shows the potential to design advanced Co-based N, S co-doped catalysts with high electrochemical performance and low cost, which could be applied for fuel cells and other devices.[a] Z.

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N-, O- and P-doped hollow carbons: Metal-free bifunctional electrocatalysts for hydrogen evolution and oxygen reduction reactions

Cited by 150 publications

References 53 publications

High‐performance N, P‐CNL nanocomposites as catalyst for oxygen reduction reaction in fuel cell

High‐performance N, P‐CNL nanocomposites as catalyst for oxygen reduction reaction in fuel cell

Optimization of Catalytic Sites in Cobalt‐Modified Nitrogen‐Doped Carbon towards High‐Performance Oxygen Reduction Electrocatalysts for Zinc‐Air Batteries

Cobalt Nanoparticles Embedded in N, S Co‐Doped Carbon towards Oxygen Reduction Reaction Derived by in situ Reducing Cobalt Sulfide

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