Oxygen-evolving catalytic atoms on metal carbides

Li, Shuang; Chen, Bingbing; Wang, Yi; Ye, Mengyang; Aken, Peter A. van; Cheng, Chong; Thomas, Arne

doi:10.1038/s41563-021-01006-2

Cited by 272 publications

(230 citation statements)

References 35 publications

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“…[1][2][3] However, the four electrons, multi O-containing intermediates (i.e., OH*,O*, and OOH*), three phases (i.e., solid catalyst, liquid electrolyte, and gaseous O 2 ) involved process makes the OER kinetically sluggish with a large overpotential loss. [3][4][5] Exploring more active and stable catalysts for OER has become increasingly attractive in recent years.…”

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confidence: 99%

Dense Crystalline–Amorphous Interfacial Sites for Enhanced Electrocatalytic Oxygen Evolution

Qin

Liu

et al. 2021

Adv Funct Materials

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The crystalline-amorphous (c-a) heterostructure is verified as a promising design for oxygen evolution reaction (OER) catalysts due to the concerted advantages of the crystalline and amorphous phase. However, most heterostructures via asynchronous heterophase synthesis suffer from the limited synergistic effect because of the sparse c-a interfaces. Here, a highly efficient and stable OER electrocatalyst with dense c-a interfacial sites is reported by hybridizing crystalline Ag and amorphous NiCoMo oxides (NCMO) on the nickel foam (NF) via synchronous dual-phase synthetic strategy. In 1 m KOH, the as-obtained Ag/NCMO/NF catalyst exhibits a low OER overpotential of 243 mV to attain 10 mA cm −2 and a small Tafel slope of 67 mV dec −1 . Theoretical calculations indicate that the c-a interface can efficiently modulate the electronic structure of the interfacial sites and lower the OER overpotential. Besides, in situ Raman spectroscopy results demonstrate that the c-a interfacial sites can promote the irreversible phase transition to the metal oxy(hydroxide) active phase, and the dense c-a interfaces can stabilize the active phase during the whole OER process.

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confidence: 99%

Dense Crystalline–Amorphous Interfacial Sites for Enhanced Electrocatalytic Oxygen Evolution

Qin

Liu

et al. 2021

Adv Funct Materials

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“…), 8–13 SACs contribute an excellent platform to explore great potential catalysts for different catalytic reactions, e.g. , water splitting, 14–16 nitrogen reduction reaction (NRR) 17–20 and carbon dioxide reduction reaction (CO 2 RR). 21–24 In these SACs, nitrogen (N) atoms are the common ligands used to anchor transition metal centers (TM); thus, the N-coordination environment (denoted as N x , where x is the N-coordination number) is of great importance to determine the catalytic performance of TM SACs.…”

Section: Introductionmentioning

confidence: 99%

Structural rule of N-coordinated single-atom catalysts for electrochemical CO₂ reduction

Lou

Yuan

et al. 2022

J. Mater. Chem. A

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“…Electrochemical energy storage and conversion technology by using a wide range of small molecules containing in the atmosphere such as O 2 or CO 2 have become an important way to develop clean energy devices [3][4][5][6]. Electrochemical reactions mainly involve the following reactions: oxygen reduction reaction (ORR) [7][8][9][10][11][12], oxygen evolution reaction (OER) [13][14][15][16][17][18][19][20], hydrogen evolution reaction (HER) [21][22][23][24][25], and carbon dioxide reduction reaction (CO 2 RR) [26,27]. Electrocatalysts play a key role in these energy conversion reactions, which can reduce the reaction barrier and improve the conversion rate, efficiency and selectivity, promoting the development of efficient catalysts.…”

Section: Introductionmentioning

confidence: 99%

Rational design of Fe-N-C electrocatalysts for oxygen reduction reaction: From nanoparticles to single atoms

Sun

Chen

et al. 2021

Nano Res.

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As an alternative energy, hydrogen can be converted into electrical energy via direct electrochemical conversion in fuel cells. One important drawback of full cells is the sluggish oxygen reduction reaction (ORR) promoted by the high-loading of platinumgroup-metal (PGM) electrocatalysts. Fe-N-C family has been received extensive attention because of its low cost, long service life and high oxygen reduction reaction activity in recent years. In order to further enhance the ORR activity, the synthesis method, morphology regulation and catalytic mechanism of the active sites in Fe-N-C catalysts are investigated. This paper reviews the research progress of Fe-N-C from nanoparticles to single atoms. The structure-activity relationship and catalytic mechanism of the catalyst are studied and discussed, which provide a guidance for rational design of the catalyst, so as to promote the more reasonable design of Fe-N-C materials.

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Oxygen-evolving catalytic atoms on metal carbides

Cited by 272 publications

References 35 publications

Dense Crystalline–Amorphous Interfacial Sites for Enhanced Electrocatalytic Oxygen Evolution

Dense Crystalline–Amorphous Interfacial Sites for Enhanced Electrocatalytic Oxygen Evolution

Structural rule of N-coordinated single-atom catalysts for electrochemical CO₂ reduction

Rational design of Fe-N-C electrocatalysts for oxygen reduction reaction: From nanoparticles to single atoms

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Oxygen-evolving catalytic atoms on metal carbides

Cited by 272 publications

References 35 publications

Dense Crystalline–Amorphous Interfacial Sites for Enhanced Electrocatalytic Oxygen Evolution

Dense Crystalline–Amorphous Interfacial Sites for Enhanced Electrocatalytic Oxygen Evolution

Structural rule of N-coordinated single-atom catalysts for electrochemical CO2 reduction

Rational design of Fe-N-C electrocatalysts for oxygen reduction reaction: From nanoparticles to single atoms

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Structural rule of N-coordinated single-atom catalysts for electrochemical CO₂ reduction