Regulating non-precious transition metal nitrides bifunctional electrocatalysts through surface/interface nanoengineering for air-cathodes of Zn-air batteries

Du, Qixing; Gong, Yanmei; Khan, Muhammad Arif; Ye, Daixin; Fang, Jianhui; Zhao, Hongbin; Zhang, Jiujun

doi:10.1016/j.gee.2021.01.018

Cited by 42 publications

(25 citation statements)

References 111 publications

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“…However, insufficient adsorption energies toward reaction intermediates (O*, OH*, HOO*, etc .) are still issues that hinder the application of transition metal nitrides in the OER under alkaline conditions . CeO 2 can assist in improving the OER performance of metal oxides, , sulfides, − and hydroxides (such as CoO x and NiFe(OH) x ) owing to the fact that the electron-unoccupied d orbital could serve as a Lewis-acid site for adsorbing reaction intermediates efficiently, which ultimately promotes the reaction kinetics for the OER.…”

Section: Introductionmentioning

confidence: 99%

“…are still issues that hinder the application of transition metal nitrides in the OER under alkaline conditions. 21 CeO 2 can assist in improving the OER performance of metal oxides, 22,23 sulfides, 24−26 and hydroxides (such as CoO x and NiFe(OH) x ) owing to the fact that the electron-unoccupied d orbital could serve as a Lewis-acid site for adsorbing reaction intermediates efficiently, which ultimately promotes the reaction kinetics for the OER. Until now, it has been generally recognized that the CeO 2 matrix is favorable for improving the OER performance of metal oxides/ hydroxides.…”

Section: Introductionmentioning

confidence: 99%

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Surface Reconstruction of Co₄N Coupled with CeO₂ toward Enhanced Alkaline Oxygen Evolution Reaction

et al. 2022

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Constructing the active interface in a heterojunction electrocatalyst is critical for the electron transfer and intermediate adsorption (O*, OH*, and HOO*) in alkaline oxygen evolution reaction (OER) but still remains challenging. Herein, a CeO 2 / Co 4 N heterostructure is rationally synthesized through the direct calcination of Ce[Co(CN) 6 ], followed by thermal nitridation. The in situ electrochemically generated CoOOH on the surface of Co 4 N serves as the active site for the OER, and the coupled CeO 2 with oxygen vacancy can optimize the energy barrier of intermediate reactions of the OER, which simultaneously boosts the OER performance. Besides, electrochemical measurement results demonstrate that oxygen vacancies in CeO 2 and optimized absorption free energy originating from the electron transfer between CeO 2 and CoOOH contribute to enhanced OER kinetics. This work provides new insight into regulating the interface heterostructure to rationally design efficient OER electrocatalysts under alkaline conditions.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Surface Reconstruction of Co₄N Coupled with CeO₂ toward Enhanced Alkaline Oxygen Evolution Reaction

et al. 2022

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“…Furthermore, transition metal nitrides are highly resistant to corrosion in acidic and basic medium. [21][22][23] Mo-based nitrides are considered to be an important replacement to noble metals as an electrocatalytic material with exceptional properties attributable to their Pt-like electronic configuration and high electrical conductance. At present, various studies have been done to evaluate the catalytic performance of Mo-based nitrides; for example, Ramesh et al [24] used atomic layer deposition technology to synthesize MoN x thin layer composites on conductive substrates, which is a HER electrocatalyst with an overpotential of 148 mV to achieve a current density of 10 mA cm À 2 .…”

Section: Introductionmentioning

confidence: 99%

“…The contraction of d‐band makes the electronic structure of transition metal nitrides almost similar to Pd and Pt. Furthermore, transition metal nitrides are highly resistant to corrosion in acidic and basic medium [21–23] . Mo‐based nitrides are considered to be an important replacement to noble metals as an electrocatalytic material with exceptional properties attributable to their Pt‐like electronic configuration and high electrical conductance.…”

Section: Introductionmentioning

confidence: 99%

Interfacial Engineering of Two‐Dimensional MoN/MoO₂ Heterostructure Nanosheets as a Bifunctional Electrocatalyst for Overall Water Splitting

Khan

Zhu

et al. 2022

Chemistry An Asian Journal

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It is still a challenge to realize the dream of a hydrogen‐based economy using a robust catalyst for overall water splitting. Here, we introduce two‐dimensional MoN/MoO2 heterostructure nanosheets using nickel foam as a substrate for water splitting. The heterojunction formation was achieved through the partial nitriding of a Mo‐based precursor to MoN in the annealing process under NH3 environment. The heterogeneous interface between MoN and MoO2 as active sites is supposed to improve the surface reaction kinetics and electronic conductivity. Therefore, an excellent performance is achieved when MoN/MoO2 is employed as both cathode and anode electrocatalysts; the corresponding cell voltages are 1.57 and 1.84 V at 10 and 100 mA cm−2 in 1 M KOH, respectively. The promising bifunctional catalytic performance of our catalyst opens up a new way for efficient electrochemical water splitting.

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“…Precious noble-metal-based cathodes such as Pt, IrO 2, and RuO 2 are the state-of-the-art oxygen electrocatalysts, [5] but their scarcity, moderate durability, and unsatisfactory bifunctional performance severely undermine the economic benefits of ZABs. [6][7][8] With this in mind, significant efforts have been focused on exploring non-noble metal cathode for rechargeable ZABs, such as transition metal oxides/phosphides/sulfides/nitrides, [9][10][11] perovskites, [12] spinel oxides, [13] and carbons, [14] many of which are emerging as highly promising substitutes to benchmark noble metal cathodes. Particularly, cobalt (Co), as a representative transition metal with potential activities toward both ORR and OER, has attracted intensive interests.…”

mentioning

confidence: 99%

Highly Dispersive Co@N‐C Catalyst as Freestanding Bifunctional Cathode for Flexible and Rechargeable Zinc–air Batteries

Chen

et al. 2022

Energy & Environ Materials

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The commercial applications of wearable electronics require the rapid growth of flexible, reliable energy-storage systems with high energy density and long shelf life. Rechargeable Zn-air batteries (ZABs) have promising applications in wearable electrochemical electronics, owing to a high theoretical energy density of 1086 Wh kg −1 , inherent safety, environmental friendliness, and low cost. [1][2][3] One pivotal task is the efficient interconversion of chemicals and electricity via oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) processes taken place at the air cathode of the rechargeable ZABs, [4] which requires the use of highly active, stable bifunctional cathode for both reactions. Precious noble-metal-based cathodes such as Pt, IrO 2, and RuO 2 are the state-of-the-art oxygen electrocatalysts, [5] but their scarcity, moderate durability, and unsatisfactory bifunctional performance severely undermine the economic benefits of ZABs. [6][7][8] With this in mind, significant efforts have been focused on exploring non-noble metal cathode for rechargeable ZABs, such as transition metal oxides/phosphides/sulfides/nitrides, [9][10][11] perovskites, [12] spinel oxides, [13] and carbons, [14] many of which are emerging as highly promising substitutes to benchmark noble metal cathodes. Particularly, cobalt (Co), as a representative transition metal with potential activities toward both ORR and OER, has attracted intensive interests. However, around 70% Co is found in the Democratic Republic of the Congo (DRC). The increasing demand for Co has put great pressure on local artisanal miners, where the child labor and unsafe working practices are rife. [15] To reduce such unintended consequences, it is encouraged to improve the utilization of Co, meanwhile develop other high-performance alternatives with rich abundance.Carbon-based bifunctional cathode has become a hot research focus because of their fast electron/mass transfer competence and tunable chemical/porous properties, such as metal organic framework derivatives, [16,17] biomass-derived carbon, [18] graphene or carbon nanotube based hybrids, [19,20] and so forth. However, most research witnesses a dilemma in cathode design, that is, how to achieve a balanced improvement of overall activity for ORR and OER in view of their distinctive catalytic sites. [21,22] Doping strategy and inclusion of highly dispersed

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Regulating non-precious transition metal nitrides bifunctional electrocatalysts through surface/interface nanoengineering for air-cathodes of Zn-air batteries

Cited by 42 publications

References 111 publications

Surface Reconstruction of Co₄N Coupled with CeO₂ toward Enhanced Alkaline Oxygen Evolution Reaction

Surface Reconstruction of Co₄N Coupled with CeO₂ toward Enhanced Alkaline Oxygen Evolution Reaction

Interfacial Engineering of Two‐Dimensional MoN/MoO₂ Heterostructure Nanosheets as a Bifunctional Electrocatalyst for Overall Water Splitting

Highly Dispersive Co@N‐C Catalyst as Freestanding Bifunctional Cathode for Flexible and Rechargeable Zinc–air Batteries

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Regulating non-precious transition metal nitrides bifunctional electrocatalysts through surface/interface nanoengineering for air-cathodes of Zn-air batteries

Cited by 42 publications

References 111 publications

Surface Reconstruction of Co4N Coupled with CeO2 toward Enhanced Alkaline Oxygen Evolution Reaction

Surface Reconstruction of Co4N Coupled with CeO2 toward Enhanced Alkaline Oxygen Evolution Reaction

Interfacial Engineering of Two‐Dimensional MoN/MoO2 Heterostructure Nanosheets as a Bifunctional Electrocatalyst for Overall Water Splitting

Highly Dispersive Co@N‐C Catalyst as Freestanding Bifunctional Cathode for Flexible and Rechargeable Zinc–air Batteries

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Surface Reconstruction of Co₄N Coupled with CeO₂ toward Enhanced Alkaline Oxygen Evolution Reaction

Surface Reconstruction of Co₄N Coupled with CeO₂ toward Enhanced Alkaline Oxygen Evolution Reaction

Interfacial Engineering of Two‐Dimensional MoN/MoO₂ Heterostructure Nanosheets as a Bifunctional Electrocatalyst for Overall Water Splitting