Space-confined synthesis of CoNi nanoalloy in N-doped porous carbon frameworks as efficient oxygen reduction catalyst for neutral and alkaline aluminum-air batteries

Jiang, Min; Yang, Jian; Ju, Jiang; Zhang, Wei; Lin, He; Zhang, Jiao; Fu, Chaopeng; Sun, Baode

doi:10.1016/j.ensm.2020.01.016

Cited by 72 publications

(46 citation statements)

References 70 publications

(49 reference statements)

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“…The peak at 503 cm −1 is ascribed to CoO(OH) (Fig. 5e) [48,49]. The reduction of Co 2+ -O peak and appearance of CoO(OH) peak confirm the change of chemical state of CoS 2 @MXene, which is consistent with the XPS results.…”

Section: Electrocatalytic Activitysupporting

confidence: 87%

Multi-dimensional hierarchical CoS2@MXene as trifunctional electrocatalysts for zinc-air batteries and overall water splitting

et al. 2020

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The demanding all-in-one electrocatalyst system for oxygen reduction reaction (ORR), oxygen evolution reaction (OER) and hydrogen evolution reaction (HER) in zinc-air batteries or water splitting requires elaborate material manufacturing, which is usually complicated and time-consuming. Efficient interface engineering between MXene and highly active electrocatalytic species (CoS 2 ) is, herein, achieved by an in situ hydrothermal growth and facile sulfurization process. The CoS 2 @MXene electrocatalyst is composed by one-dimensional CoS 2 nanowires and two-dimensional MXene nanosheets, which lead to a hierarchical structure (large specific surface area and abundant active sites), a spatial electron redistribution (high intrinsic activity), and high anchoring strength (superior performance stability). Therefore, the electrocatalyst achieves enhanced catalytic activity and longtime stability for ORR (a half-wave potential of 0.80 V), OER (an overpotential of 270 mV at 10 mA cm −2 , i.e., η 10 = 270 mV) and HER (η 10 = 175 mV). Furthermore, the asymmetry water splitting system based on the CoS 2 @MXene composites delivers a low overall voltage of 1.63 V at 10 mA cm −2 . The solidstate zinc-air batteries using CoS 2 @MXene as the air cathode display a small charge-discharge voltage gap (0.53 V at 1 mA cm −2 ) and superior stability (60 circles and 20-h continuous test). The energy interconversion between the chemical energy and electricity can be achieved by a self-powered system via integrating the water splitting system and quasisolid-state zinc-air batteries. Supported by in situ Raman analyses, the formation of cobalt oxyhydroxide species provides the active sites for water oxidation. This study paves a promising avenue for the design and application of multifunctional nanocatalysts.

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Section: Electrocatalytic Activitysupporting

confidence: 87%

Multi-dimensional hierarchical CoS2@MXene as trifunctional electrocatalysts for zinc-air batteries and overall water splitting

et al. 2020

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“…The solid‐state Al–air battery and its open circuit voltage (OCV) are shown in Figure S22 in the Supporting Information, while the aqueous Al–air battery with FeCo‐N‐HCN catalysts was tested with Multimeter as shown in Figure S23a in the Supporting Information, revealing a very high OCV of 2.04 V, which was superior as compared to reported Al–air batteries. [ 64 ] Intuitively, two Al‐batteries in parallel were constructed to light up 34 light‐emitting diodes (LEDs) with “HNU” shape, as shown in Figure S23b in the Supporting Information. The LEDs were indeed lighted but not very blinging, since the voltage was not high enough.…”

Section: Resultsmentioning

confidence: 99%

Understanding of Neighboring Fe‐N₄‐C and Co‐N₄‐C Dual Active Centers for Oxygen Reduction Reaction

Wen

Jiang

et al. 2021

Adv Funct Materials

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171

135

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Single atomic dispersed M-N-C (M = Fe, Co, Ni, Cu, etc.) composites display excellent performance for catalytic reactions. However, the analysis and understanding of neighboring M-N-C centers at the atomic level are still insufficient. Here, FeCo-N-doped hollow carbon nanocages (FeCo-N-HCN) with neighboring Fe-N 4 -C and Co-N 4 -C dual active centers as efficient catalysts are reported. Spherical aberration-corrected high angle annular darkfield scanning transmission electron microscopy, small area (1 nm 2 ) electron energy loss spectroscopy, and X-ray absorption spectroscopy data analysis and fitting prove the neighboring Fe-N 4 -C and Co-N 4 -C dual active structure in FeCo-N-HCN. Experimental tests and density functional theory calculation results reveal that the FeCo-N-HCN catalyst displays better catalytic activity than Fe single-metal catalyst for oxygen reduction reaction (ORR), which is attributed to the synergistic effect of Fe-N 4 -C and Co-N 4 -C dual active centers reducing the reaction energy barriers for ORR. Although the catalytic performance of the FeCo-N-HCN catalyst is not comparable to the-state-of-art catalysts reported due to the low metal contents (Fe: 1.96 wt% and Co: 1.31 wt%), these results can refresh the understanding of neighboring M-N-C centers at the atomic level and provide guidance for the design of catalysts in the future.

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“…Very recently, using SACs to catalyze electrochemical reactions in solar cells, fuel cells, secondary batteries, and electrolyzers have emerged. SACs have shown the high activity and selectivity for oxygen reduction reaction (ORR), hydrogen evolution reaction (HER), hydrogen oxidation reaction (HOR) and formic acid oxidation reaction (FAOR) [92][93][94][95]. For metal-sulfur batteries, the sluggish reaction kinetics of sulfur cathode is urgent to be solved.…”

Section: Introductionmentioning

confidence: 99%

Single-atom catalysts for metal-sulfur batteries: Current progress and future perspectives

Xiao

Chen

Zhang

et al. 2021

Journal of Energy Chemistry

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Space-confined synthesis of CoNi nanoalloy in N-doped porous carbon frameworks as efficient oxygen reduction catalyst for neutral and alkaline aluminum-air batteries

Cited by 72 publications

References 70 publications

Multi-dimensional hierarchical CoS2@MXene as trifunctional electrocatalysts for zinc-air batteries and overall water splitting

Multi-dimensional hierarchical CoS2@MXene as trifunctional electrocatalysts for zinc-air batteries and overall water splitting

Understanding of Neighboring Fe‐N₄‐C and Co‐N₄‐C Dual Active Centers for Oxygen Reduction Reaction

Single-atom catalysts for metal-sulfur batteries: Current progress and future perspectives

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Space-confined synthesis of CoNi nanoalloy in N-doped porous carbon frameworks as efficient oxygen reduction catalyst for neutral and alkaline aluminum-air batteries

Cited by 72 publications

References 70 publications

Multi-dimensional hierarchical CoS2@MXene as trifunctional electrocatalysts for zinc-air batteries and overall water splitting

Multi-dimensional hierarchical CoS2@MXene as trifunctional electrocatalysts for zinc-air batteries and overall water splitting

Understanding of Neighboring Fe‐N4‐C and Co‐N4‐C Dual Active Centers for Oxygen Reduction Reaction

Single-atom catalysts for metal-sulfur batteries: Current progress and future perspectives

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Understanding of Neighboring Fe‐N₄‐C and Co‐N₄‐C Dual Active Centers for Oxygen Reduction Reaction