Fe-Doping induced divergent growth of Ni-Fe alloy nanoparticles for enhancing the electrocatalytic oxygen reduction
Identifikátory výsledku
Kód výsledku v IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11310%2F21%3A10442270" target="_blank" >RIV/00216208:11310/21:10442270 - isvavai.cz</a>
Výsledek na webu
<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=bmAt8VV6mN" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=bmAt8VV6mN</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1039/d1cy00668a" target="_blank" >10.1039/d1cy00668a</a>
Alternativní jazyky
Jazyk výsledku
angličtina
Název v původním jazyce
Fe-Doping induced divergent growth of Ni-Fe alloy nanoparticles for enhancing the electrocatalytic oxygen reduction
Popis výsledku v původním jazyce
Non-noble metal Ni and its alloy based catalysts are promising alternatives to Pt catalysts for the oxygen reduction reaction (ORR). Control of the exposed crystallographic facets of catalysts is an efficient way of tailoring their activity, but the practicability and the investigation of the underlying mechanisms of this protocol still present challenges for Ni and its alloys. Herein, we succeeded in preparing Ni-Fe alloy nanoparticles (NPs) with different exposed facets via pyrolysis of Fe-substituted Ni-bispyrazolate metal-organic frameworks. Fe-doping induces divergent growth in the two kinds of NPs to afford separate (111)- and (200)-faceted NPs with distinguishable diameters. Density functional theory (DFT) calculations were used to simulate the ORR process on the two facets of the Ni-Fe NPs, revealing that the (200)-faceted NPs show the highest activity due to their large compressive strain effect. The experimental results confirm the enhanced ORR activity of the derived catalysts and superior performance of assembled Zn-air batteries.
Název v anglickém jazyce
Fe-Doping induced divergent growth of Ni-Fe alloy nanoparticles for enhancing the electrocatalytic oxygen reduction
Popis výsledku anglicky
Non-noble metal Ni and its alloy based catalysts are promising alternatives to Pt catalysts for the oxygen reduction reaction (ORR). Control of the exposed crystallographic facets of catalysts is an efficient way of tailoring their activity, but the practicability and the investigation of the underlying mechanisms of this protocol still present challenges for Ni and its alloys. Herein, we succeeded in preparing Ni-Fe alloy nanoparticles (NPs) with different exposed facets via pyrolysis of Fe-substituted Ni-bispyrazolate metal-organic frameworks. Fe-doping induces divergent growth in the two kinds of NPs to afford separate (111)- and (200)-faceted NPs with distinguishable diameters. Density functional theory (DFT) calculations were used to simulate the ORR process on the two facets of the Ni-Fe NPs, revealing that the (200)-faceted NPs show the highest activity due to their large compressive strain effect. The experimental results confirm the enhanced ORR activity of the derived catalysts and superior performance of assembled Zn-air batteries.
Klasifikace
Druh
J<sub>imp</sub> - Článek v periodiku v databázi Web of Science
CEP obor
—
OECD FORD obor
10403 - Physical chemistry
Návaznosti výsledku
Projekt
—
Návaznosti
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Ostatní
Rok uplatnění
2021
Kód důvěrnosti údajů
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Údaje specifické pro druh výsledku
Název periodika
Catalysis: Science and Technology
ISSN
2044-4753
e-ISSN
—
Svazek periodika
11
Číslo periodika v rámci svazku
15
Stát vydavatele periodika
GB - Spojené království Velké Británie a Severního Irska
Počet stran výsledku
9
Strana od-do
5171-5179
Kód UT WoS článku
000670228000001
EID výsledku v databázi Scopus
2-s2.0-85112369024