Atomically dispersed manganese-based catalysts for efficient catalysis of oxygen reduction reaction

Bai, Lu; Duan, Zhiyao; Wen, Xudong; Si, Rui; Guan, Jingqi

doi:10.1016/j.apcatb.2019.117930

Cited by 131 publications

(60 citation statements)

References 43 publications

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“…Single-atom (SA) catalysts, [14][15][16][17][18][19][20][21][22][23][24] which are isolated metal sites anchored onto appropriate supports, have been reported to exhibit superior catalytic performance and high selectivity for diverse electrochemical reactions. In this regard, the development of trifunctional SA catalysts can not only considerably reduce the use of noble metals required in electrolysis but also achieve optimized electrochemical performance.…”

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confidence: 99%

Trifunctional Single‐Atomic Ru Sites Enable Efficient Overall Water Splitting and Oxygen Reduction in Acidic Media

Peng

Zhao

et al. 2020

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Energy crisis and environmental pollution trigger the development of efficient and robust electrochemical energy conversion and storage technologies. [1-3] The electrocatalytic reactions, such as hydrogen evolution reaction (HER), oxygen evolution reaction (OER), and oxygen reduction reaction (ORR), undoubtedly play key roles in developing renewable energy conversion devices, Development of cost-effective, active trifunctional catalysts for acidic oxygen reduction (ORR) as well as hydrogen and oxygen evolution reactions (HER and OER, respectively) is highly desirable, albeit challenging. Herein, singleatomic Ru sites anchored onto Ti 3 C 2 T x MXene nanosheets are first reported to serve as trifunctional electrocatalysts for simultaneously catalyzing acidic HER, OER, and ORR. A half-wave potential of 0.80 V for ORR and small overpotentials of 290 and 70 mV for OER and HER, respectively, at 10 mA cm −2 are achieved. Hence, a low cell voltage of 1.56 V is required for the acidic overall water splitting. The maximum power density of an H 2-O 2 fuel cell using the as-prepared catalyst can reach as high as 941 mW cm −2. Theoretical calculations reveal that isolated Ru-O 2 sites can effectively optimize the adsorption of reactants/intermediates and lower the energy barriers for the potentialdetermining steps, thereby accelerating the HER, ORR, and OER kinetics.

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confidence: 99%

Trifunctional Single‐Atomic Ru Sites Enable Efficient Overall Water Splitting and Oxygen Reduction in Acidic Media

Peng

Zhao

et al. 2020

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“…The N 1s spectrum for CuZn/NC can be deconvoluted into pyridinic N (398.8 eV), pyrrolic N (400.6 eV), graphitic N (401.4 eV), and oxidized N (403.6 eV), respectively ( Figure S10, Supporting Information). [15,42] In addition, the abundant N doping and defective sites provided many anchor sites for Cu and Zn metal centers, and resulted in the formation of Cu−N (397.9 eV) and Zn−N (399.7 eV) bonds in Figure S10 (Supporting Information).…”

Section: Resultsmentioning

confidence: 99%

“…[7][8][9][10][11] As an important alternative to the expensive platinum-based catalysts, the earthabundant metals anchored on N-doped carbon, [12,13] especially in the form of M−N−C (M = Fe, Co, Ni, Cu, Mn, Zn, etc. ), [14][15][16][17][18] are attracting great attention recently due to their low cost and unexpected ORR reactivity. The efficient performance of these M−N−C centers can be attributed to the atomic-level regulation of metal electronic structures by the N heteroatoms on carbon matrixes.…”

Section: Introductionmentioning

confidence: 99%

Engineering Atomic Sites via Adjacent Dual‐Metal Sub‐Nanoclusters for Efficient Oxygen Reduction Reaction and Zn‐Air Battery

Liu

et al. 2020

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N‐coordinated transition‐metal materials are crucial alternatives to design cost‐effective, efficient, and highly durable catalysts for electrocatalytic oxygen reduction reaction. Herein, the synthesis of uniformly distributed Cu−Zn clusters on porous N‐doped carbon, which are accompanied by Cu/Zn‐Nx single sites, is demonstrated. X‐ray absorption fine structure tests reveal the co‐existence of M−N (M = Cu or Zn) and M−M bonds in the catalyst. The catalyst shows excellent oxygen reduction reaction (ORR) performance in an alkaline medium with a positive half‐wave potential of 0.884 V, a superior kinetic current density of 36.42 mA cm−2 at 0.85 V, and a Tafel slope of 45 mV dec−1, all of which are among the best‐reported results. Furthermore, when employed as an air cathode in Zn‐Air battery, it reveals a high open‐cycle potential of 1.444 V and a peak power density of 164.3 mW cm−2. Comprehensive experiments and theoretical calculations approved that the high activity of the catalyst can be attributed to the collaboration of the Cu/Zn‐N4 sites with CuZn moieties on N‐doped carbons.

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“…The superior electrochemical performance can be attributed to the unique single-atom active sites with efficient mass and electron transfer channels. Bai et al [140] reported atomically dispersed Mn-and N-co-doped graphene (Mn@NG) by annealing Mn 2+ /graphene oxide precursor under an ammonia atmosphere and subsequent acid treatment, and the primary active site for the high ORR activity of asfabricated catalyst was demonstrated to be MnN 4 -G site by the DFT calculations. The electrochemical performance of asfabricated Mn@NG catalyst is evidently improved by the MnN 4 sites dispersed at an atom scale, exhibiting an onset potential of 0.95 V and a half-wave potential of 0.82 V in 0.1 M KOH.…”

Section: Single Atom Strategymentioning

confidence: 99%

Insights into efficient transition metal-nitrogen/carbon oxygen reduction electrocatalysts

Wang

Weng

Yuan

2021

Journal of Energy Chemistry

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Atomically dispersed manganese-based catalysts for efficient catalysis of oxygen reduction reaction

Cited by 131 publications

References 43 publications

Trifunctional Single‐Atomic Ru Sites Enable Efficient Overall Water Splitting and Oxygen Reduction in Acidic Media

Trifunctional Single‐Atomic Ru Sites Enable Efficient Overall Water Splitting and Oxygen Reduction in Acidic Media

Engineering Atomic Sites via Adjacent Dual‐Metal Sub‐Nanoclusters for Efficient Oxygen Reduction Reaction and Zn‐Air Battery

Insights into efficient transition metal-nitrogen/carbon oxygen reduction electrocatalysts

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