Ni single atoms anchored on N-doped carbon nanosheets as bifunctional electrocatalysts for Urea-assisted rechargeable Zn-air batteries

Jiang, Hao; Xia, Jing; Jiao, Long; Meng, Xiangmin; Wang, Pengfei; Lee, Chun‐Sing; Zhang, Wenjun

doi:10.1016/j.apcatb.2022.121352

Cited by 102 publications

(51 citation statements)

References 48 publications

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“…Generally, active centers anchored onto mesoporous carbon should be minimized in size (for instance, single-atoms or clusters) to maximize the utilization of the superficial area of the NC substrate [31][32][33][34][35][36][37]. Many pioneering efforts have also demonstrated that atomically dispersed active sites anchored onto NC substrates can effectively enhance ORR performances, indicating a preferable application of NC substrates [38][39][40][41][42][43][44], for instance, isolated single-atom Fe anchored on N-doped porous carbon and Cu-Zn clusters on porous NC [45][46][47]. Furthermore, transition metal-nitrogen-carbon (TM-N-C)-based catalysts have attracted widespread interest for CO 2 RR electrocatalysis because their 3d electron orbitals endow metal-N x (x denotes N coordination number) sites with efficient intrinsic CO 2 RR activity [48][49][50].…”

Section: Introductionmentioning

confidence: 99%

Bifunctional Nb-N-C atomic catalyst for aqueous Zn-air battery driving CO2 electrolysis

et al. 2022

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Designing efficient and cost-effective bifunctional catalysts is desirable for carbon dioxide and oxygen reduction reactions (CO 2 RR and ORR) to address carbon neutralization and energy conversion. Herein, a bifunctional CO 2 RR and ORR catalyst for aqueous Zn-air battery (ZAB) self-driving CO 2 RR electrolysis is developed using atomically dispersed niobium anchored onto N-doped ordered mesoporous carbon (Nb-N-C). The Nb-N-C atomic catalyst demonstrates aqueous CO 2 RR activity with CO Faradaic efficiency up to 90%, ORR activity with a half-wave potential of 0.84 V vs. reversible hydrogen electrode, and ZAB activity with a peak power density of 115.6 mW cm −2 , owing to the high Nb atom-utilization efficiency and ordered mesoporous structure. Furthermore, two-unit ZABs in series, serving as the power source for the self-powered CO 2 electrolysis system, continuously convert CO 2 to CO with average productivity of 3.75 μmol h −1 mg cat −1 during the first 10 h. Moreover, theoretical calculations exhibit that atomic Nb anchored to N-doped carbon can form Nb-N coordination bonds, effectively reducing the energy barriers of potential-determining * COOH for CO 2 RR and * O formation for ORR.

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Section: Introductionmentioning

confidence: 99%

Bifunctional Nb-N-C atomic catalyst for aqueous Zn-air battery driving CO2 electrolysis

et al. 2022

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“…This value is consistent with the onset potential of the oxidation peak in the OER, which corresponds to the preoxidation process of Ni 2+ to Ni 3+ . Therefore, the Ni 3+ can be considered as the main active site for urea oxidation, and the generated Ni 3+ can immediately participate in the electrocatalytic reaction, which is in line with the previous works. ,, In addition, the H 2 –NiFe/Co 3 O 4 electrode only needs a low potential of 1.420 V to reach 1 A cm –2 , which is better than many of the high-end Co-, Ni-, and Fe-based catalysts (Table S5). As mentioned above, the trimetal interaction can promote the formation of high-valent Ni, which can further facilitate the best UOR performance of H 2 –NiFe/Co 3 O 4 .…”

Section: Resultsmentioning

confidence: 99%

Plasma-Induced Surface Reconstruction of NiFe/Co₃O₄ Nanoarrays for High-Current and Ultrastable Oxygen Evolution and the Urea Oxidation Reaction

Liao

Liu

Deng

et al. 2022

Ind. Eng. Chem. Res.

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Low-cost and simple strategies to synthesize highly efficient and robust oxidative electrocatalysts for commercial largescale water electrolysis are still a challenge. Here, we reported a reductive H 2 plasma surface modification strategy, where a defectrich amorphous NiFe coating layer can be anchored and interact with porous Co 3 O 4 nanoarrays. The plasma-modified surface can promote the reconstruction process to generate high-valence and ultra-active species, thus forming abundant active centers and oxygen vacancies with high electrocatalytic activity. The H 2 −NiFe/ Co 3 O 4 composite reveals excellent bifunctional electrocatalytic ability, and ultralow overpotentials of 233 and 273 mV are required to reach 100 and 1000 mA cm −2 , respectively, for oxygen evolution, while the urea oxidation reaction (UOR) requires the potentials of 1.315 and 1.420 V to reach 10 and 1000 mA cm −2 , respectively. The superior electrocatalytic stability is confirmed by a 240 h longterm test at 1 A cm −2 for the oxygen evolution reaction and the consecutive multistep chronoamperometric tests for the UOR. This work provides an easily scalable and energy-efficient surface modification method to fabricate a robust bifunctional catalyst, while the atomic species and configuration can also be flexibly adjusted, which is suitable to be extended to various application fields.

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“…23 However, these reported mono-metallic electrocatalysts tend to catalyze only one kind of electrochemical reaction (ORR or OER), showing the defect of insufficient catalytic function. 24,25 Beyond that, their activities are usually restricted by the relatively fixed positions in the well-known “volcano plots”. 26 Thus, bi-functional electrocatalysts with satisfactory ORR/OER performances are critically important and require ingenious designs for material syntheses.…”

Section: Introductionmentioning

confidence: 99%

Atomic-level orbital coupling in a tri-metal alloy site enables highly efficient reversible oxygen electrocatalysis

Chen

Zhang

et al. 2023

J. Mater. Chem. A

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Ni single atoms anchored on N-doped carbon nanosheets as bifunctional electrocatalysts for Urea-assisted rechargeable Zn-air batteries

Cited by 102 publications

References 48 publications

Bifunctional Nb-N-C atomic catalyst for aqueous Zn-air battery driving CO2 electrolysis

Bifunctional Nb-N-C atomic catalyst for aqueous Zn-air battery driving CO2 electrolysis

Plasma-Induced Surface Reconstruction of NiFe/Co₃O₄ Nanoarrays for High-Current and Ultrastable Oxygen Evolution and the Urea Oxidation Reaction

Atomic-level orbital coupling in a tri-metal alloy site enables highly efficient reversible oxygen electrocatalysis

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Ni single atoms anchored on N-doped carbon nanosheets as bifunctional electrocatalysts for Urea-assisted rechargeable Zn-air batteries

Cited by 102 publications

References 48 publications

Bifunctional Nb-N-C atomic catalyst for aqueous Zn-air battery driving CO2 electrolysis

Bifunctional Nb-N-C atomic catalyst for aqueous Zn-air battery driving CO2 electrolysis

Plasma-Induced Surface Reconstruction of NiFe/Co3O4 Nanoarrays for High-Current and Ultrastable Oxygen Evolution and the Urea Oxidation Reaction

Atomic-level orbital coupling in a tri-metal alloy site enables highly efficient reversible oxygen electrocatalysis

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Plasma-Induced Surface Reconstruction of NiFe/Co₃O₄ Nanoarrays for High-Current and Ultrastable Oxygen Evolution and the Urea Oxidation Reaction