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Enhancement mechani...
Enhancement mechanism of P dopant on atomically distributed FeN 4 P-C electrocatalyst over a wide pH range
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- Javed, Rida (författare)
- Shanghai University
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Zhao, Hongbin (författare)
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Ye, Daixin (författare)
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Javed, Mehwish (författare)
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- Chen, Jingkui (författare)
- Shanghai University
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Sun, Congli (författare)
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- Khan, Muhammad Arif (författare)
- Shanghai University
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- Chen, Lin, 1990 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology
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Shah, Luqman Ali (författare)
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Zhang, Jiujun (författare)
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(creator_code:org_t)
- Elsevier BV, 2022
- 2022
- Engelska.
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Ingår i: Electrochimica Acta. - : Elsevier BV. - 0013-4686. ; 436
- Relaterad länk:
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https://doi.org/10.1...
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https://research.cha...
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Abstract
Ämnesord
Stäng
- Heteroatom doping plays an essential role in improving the catalytic performance of electrocatalysts for oxygen reduction reaction (ORR). However, how to regulate heteroatom doping remains a significant challenge. This paper develops an efficient strategy by using a novel versatile chelating ligand to enhance P loading and expose more metal single Fe atom active sites of FeN4P-C catalyst. The electron distribution of active center is considerably changed by P doping, which significantly influences the catalytic ORR performance. The dopant P in the FeN4P-C catalyst induces a small number of d-electrons from t2g-orbitals around the Fermi level, making the interaction between Fe active site and O2 slightly more robust than in the FeN4[sbnd]C catalyst, as studied by DFT calculations. The as-prepared FeN4P-C catalyst exhibits excellent catalytic ORR activity in both acidic (with a half-wave potential of 0.760 V vs. RHE) and basic (with a half-wave potential of 0.885 V vs. RHE) conditions, which are superior to those of the commercial Pt/C (20 wt%) catalyst. Furthermore, this catalyst also demonstrates outstanding stability and good hydrogen peroxide and methanol tolerance. A Zinc-air battery(ZAB) assembled using the cathode catalyst has validated the high performance of this catalyst. This study provides an efficient method for generating well-defined single-atom active sites to improve catalytic performance and paves the way to identify coordinated single metal atom sites for electrocatalysis applications.
Ämnesord
- NATURVETENSKAP -- Kemi -- Oorganisk kemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Inorganic Chemistry (hsv//eng)
- TEKNIK OCH TEKNOLOGIER -- Kemiteknik -- Annan kemiteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Chemical Engineering -- Other Chemical Engineering (hsv//eng)
- NATURVETENSKAP -- Kemi -- Organisk kemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Organic Chemistry (hsv//eng)
Nyckelord
- Oxygen reduction reaction (ORR)
- Active sites
- Non-noble electrocatalyst
- Nitrogen & phosphorous co-doping
- Single Fe atom
- Ligand
- Willow catkin
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Till lärosätets databas
- Av författaren/redakt...
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Javed, Rida
-
Zhao, Hongbin
-
Ye, Daixin
-
Javed, Mehwish
-
Chen, Jingkui
-
Sun, Congli
-
visa fler...
-
Khan, Muhammad A ...
-
Chen, Lin, 1990
-
Shah, Luqman Ali
-
Zhang, Jiujun
-
visa färre...
- Om ämnet
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- NATURVETENSKAP
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NATURVETENSKAP
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och Kemi
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och Oorganisk kemi
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- TEKNIK OCH TEKNOLOGIER
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TEKNIK OCH TEKNO ...
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och Kemiteknik
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och Annan kemiteknik
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- NATURVETENSKAP
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NATURVETENSKAP
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och Kemi
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och Organisk kemi
- Artiklar i publikationen
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Electrochimica A ...
- Av lärosätet
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Chalmers tekniska högskola