NiCo alloy nanoparticles encapsulated in multi-dimensional N-doped carbon architecture as efficient bifunctional catalyst for rechargeable zinc-air batteries

Deng, Daijie; Tian, Yuhui; Li, Hongping; Qian, Junchao; Pang, Jingyu; Wang, Boxuan; Zhang, Qi; Li, Henan

doi:10.1016/j.jallcom.2019.05.205

Cited by 45 publications

(30 citation statements)

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“…This is perhaps attributed to the higher graphitization degree of Ni 2 Co 2 -CNR 24 (Figure 1m) and optimized electronic structure between NiCo alloy nanoparticles (Figure 3b,c). Additionally, because of the proportion between electrochemical active surface area (ECSA) and electrochemical double-layer capacitance (Cdl), 22,30 CV measurements at different scan rates were conducted to calculate the value of C dl so as to further estimate ECSA. As shown in Figure 5d and Figure S6, Ni 2 Co 2 -CNR displays the largest C dl determined to be 44.9 mF cm −2 , higher than those of other as-synthesized samples, demonstrating that Ni 2 Co 2 -CNR can supply more active sites for redox reactions.…”

Section: Synthesis Of Nimentioning

confidence: 99%

“…As displayed in Figure 5c, the Ni 2 Co 2 -CNR catalyst exhibits a VG of 0.74 V, lower than that of Pt/C + IrO 2 (0.86 V) and some reported transition-metal alloy-based bifunctional catalysts. 16,17,22,24,25,30,36,42,50 3.3. Performance of Zinc-Air Flow Batteries.…”

Section: Synthesis Of Nimentioning

confidence: 99%

“…As an example, Li et al reported a preferable bifunctional electrocatalyst for ORR and OER, which is composed of carbon nanotubes anchored with NiCo alloy nanoparticles. 30 Inspired by the above, in this article, a highly efficient, lowcost, and stable bifunctional electrocatalyst containing NiCo alloy nanoparticles and a small fraction of CNTs, which are tightly anchored and decorated on carbon nanorods, respectively, (Ni x Co y -CNR), is presented. Also, the whole synthetic process is overwhelmingly simple and facile, which only involves an oil bath method and subsequent calcination.…”

Section: Introductionmentioning

confidence: 99%

“…Furthermore, the earth abundance as well as environmental friendliness of nickel and cobalt may contribute to their heavy use. As an example, Li et al reported a preferable bifunctional electrocatalyst for ORR and OER, which is composed of carbon nanotubes anchored with NiCo alloy nanoparticles …”

Section: Introductionmentioning

confidence: 99%

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NiCo Alloy Nanoparticles Anchored on Carbon Nanotube-Decorated Carbon Nanorods as a Durable and Efficient Oxygen Electrocatalyst for Zinc-Air Flow Batteries

Wei

Jin

Yang

et al. 2021

ACS Appl. Energy Mater.

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The exploring of oxygen electrocatalysts with outstanding durability and efficiency toward the oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) is greatly desired for zinc-air flow batteries (ZAFBs). Herein, NiCo alloy-based nanoparticles anchored on carbon nanotube-decorated carbon nanorods (CNRs) used as a durable and efficient oxygen electrocatalyst for ZAFBs were obtained from the pyrolysis of NiCo metal−organic frameworks synthesized by a facile oil bath method. By tailoring the ratio of Ni 2+ and Co 2+ , the prepared sample, Ni 2 Co 2 -CNR, exhibits excellent ORR (E 1/2 = 0.80 V) and OER catalytic performances (a low overpotential of 310 mV at 10 mA cm −2 ). Impressively, the ZAFB assembled with a Ni 2 Co 2 -CNR catalyst shows a narrow voltage gap and remarkable operation durability with 1200 cycles at 5 mA cm −2 with every cycle of 20 min.

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Section: Synthesis Of Nimentioning

confidence: 99%

Section: Synthesis Of Nimentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

NiCo Alloy Nanoparticles Anchored on Carbon Nanotube-Decorated Carbon Nanorods as a Durable and Efficient Oxygen Electrocatalyst for Zinc-Air Flow Batteries

Wei

Jin

Yang

et al. 2021

ACS Appl. Energy Mater.

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“…[ 3,4 ] Although Pt‐based electrocatalysts toward ORR and Ru/Ir oxides catalysts toward OER are traditionally used, respectively, they cannot meet the above requirements due to their high cost, scarcity, and poor stability. [ 5,6 ] Therefore, it is highly desirable to develop efficient and low‐cost bifunctional electrocatalysts with superb electrocatalytic performance and stability toward ORR and OER in ZABs. [ 7–9 ]…”

Section: Introductionmentioning

confidence: 99%

Fe–Ni Alloy Nanoclusters Anchored on Carbon Aerogels as High‐Efficiency Oxygen Electrocatalysts in Rechargeable Zn–Air Batteries

Shu

Tong

et al. 2021

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In this work, Fe–Ni alloy nanoclusters (Fe–Ni ANCs) anchored on N, S co‐doped carbon aerogel (Fe–Ni ANC@NSCA catalysts) are successfully prepared by the optimal pyrolysis of polyaniline (PANI) aerogels derived from the freeze‐drying of PANI hydrogel obtained by the polymerization of aniline monomers in the co‐presence of tannic acid (TA), Fe3+, and Ni2+ ions. In addition, the optimal molar ratio of the TA, Fe3+, and Ni2+ ions for synthesis of Fe–Ni ANC@NSCA catalysts are 1:2:5, which can guarantee the formation of carbon aerogel composed of quasi‐2D porous carbon sheets and the formation of high‐density Fe–Ni ANCs with an ultrasmall size between 2 to 2.8 nm. These Fe–Ni ANCs consisting of N4–Fe–O–Ni–N4 moiety are proposed as a new type of active species for the first time, to the best of the authors’ knowledge. Thanks to their unique features, the Fe–Ni ANC@NSCA catalysts show excellent performance in oxygen reduction reaction with a half‐wave potential (E1/2) of 0.891 V and oxygen evolution reaction (260 mV @ 10 mA cm−2) in alkaline media as bifunctional catalysts, which are better than the state‐of‐the‐art commercial Pt/C catalysts and RuO2 catalysts. Moreover, Zn–air battery assembled with the Fe–Ni ANC@NSCA catalysts also shows a remarkable performance and exceptionally high stability over 500 h at 5 mA cm−2.

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Hetero‐Diatomic CoN₄‐NiN₄ Site Pairs with Long‐Range Coupling as Efficient Bifunctional Catalyst for Rechargeable Zn–Air Batteries

Yang,

Li,

Liang

et al. 2024

Advanced Science

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In this study, Co/Ni‐NC catalyst with hetero‐diatomic Co/Ni active sites dispersed on nitrogen‐doped carbon matrix is synthesized via the controlled pyrolysis of ZIF‐8 containing Co2+ and Ni2+ compounds. Experimental characterizations and theoretical calculations reveal that Co and Ni are atomically and uniformly dispersed in pairs of CoN4‐NiN4 with an intersite distance ≈0.41 nm, and there is long‐range d–d coupling between Co and Ni with more electron delocalization for higher bifunctional activity. Besides, the in situ grown carbon nanotubes at the edges of the catalyst particles allow high electronic conductivity for electrocatalysis process. Electrochemical evaluations demonstrate the superior ORR and OER bifunctionality of Co/Ni‐NC catalyst with a narrow potential gap of only 0.691 V and long‐term durability, significantly prevailing over the single‐atom Co‐NC and Ni‐NC catalysts and the benchmark Pt/C and RuO2 catalysts. Co/Ni‐NC catalyzed Zn–air batteries achieve a high specific capacity of 771 mAh g−1 and a long continuous operation period up to 340 h with a small voltage gap of ≈0.65 V, also much superior to Pt/C‐RuO2.

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NiCo alloy nanoparticles encapsulated in multi-dimensional N-doped carbon architecture as efficient bifunctional catalyst for rechargeable zinc-air batteries

Cited by 45 publications

References 49 publications

NiCo Alloy Nanoparticles Anchored on Carbon Nanotube-Decorated Carbon Nanorods as a Durable and Efficient Oxygen Electrocatalyst for Zinc-Air Flow Batteries

NiCo Alloy Nanoparticles Anchored on Carbon Nanotube-Decorated Carbon Nanorods as a Durable and Efficient Oxygen Electrocatalyst for Zinc-Air Flow Batteries

Fe–Ni Alloy Nanoclusters Anchored on Carbon Aerogels as High‐Efficiency Oxygen Electrocatalysts in Rechargeable Zn–Air Batteries

Hetero‐Diatomic CoN₄‐NiN₄ Site Pairs with Long‐Range Coupling as Efficient Bifunctional Catalyst for Rechargeable Zn–Air Batteries

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NiCo alloy nanoparticles encapsulated in multi-dimensional N-doped carbon architecture as efficient bifunctional catalyst for rechargeable zinc-air batteries

Cited by 45 publications

References 49 publications

NiCo Alloy Nanoparticles Anchored on Carbon Nanotube-Decorated Carbon Nanorods as a Durable and Efficient Oxygen Electrocatalyst for Zinc-Air Flow Batteries

NiCo Alloy Nanoparticles Anchored on Carbon Nanotube-Decorated Carbon Nanorods as a Durable and Efficient Oxygen Electrocatalyst for Zinc-Air Flow Batteries

Fe–Ni Alloy Nanoclusters Anchored on Carbon Aerogels as High‐Efficiency Oxygen Electrocatalysts in Rechargeable Zn–Air Batteries

Hetero‐Diatomic CoN4‐NiN4 Site Pairs with Long‐Range Coupling as Efficient Bifunctional Catalyst for Rechargeable Zn–Air Batteries

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Hetero‐Diatomic CoN₄‐NiN₄ Site Pairs with Long‐Range Coupling as Efficient Bifunctional Catalyst for Rechargeable Zn–Air Batteries