MoC nanocrystals confined in N-doped carbon nanosheets toward highly selective electrocatalytic nitric oxide reduction to ammonia

Meng, Guangyao; Jin, Mengmeng; Wei, Tianran; Liu, Qian; Zhang, Shusheng; Peng, Xianyun; Luo, Jun; Liu, Xijun

doi:10.1007/s12274-022-4747-y

Cited by 71 publications

(54 citation statements)

References 57 publications

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“…To understand the enhanced NORR performance of np-VN/CF, it is necessary to conduct theoretical simulations. , where these elementary reactions are thermodynamically favorable [31,[48][49][50][51]. Meanwhile, DFT calculations reveal that the NO molecule is easy to adsorb and activate on the V site of VN (200) surface, which is exergonic with an energy change of -0.37 eV (Fig.…”

Section: Resultsmentioning

confidence: 99%

High-efficiency electrocatalytic NO reduction to NH₃by nanoporous VN

Qi¹,

Lv²,

Wei³

et al. 2022

Nano Research Energy

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162

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Electrocatalytic NO reduction reaction to generate NH 3 under ambient conditions offers an attractive alternative to the energy-extensive Haber-Bosch route; however, the challenge still lies in the development of cost-effective and high-performance electrocatalysts. Herein, nanoporous VN film is first designed as a highly selective and stable electrocatalyst for catalyzing reduction of NO to NH 3 with a maximal Faradaic efficiency of 85% and a peak yield rate of 1.05 × 10 -7 mol•cm -2 •s -1 (corresponding to 5,140.8 g•h -1 •mg cat.-1 ) at -0.6 V vs. reversible hydrogen electrode in acid medium. Meanwhile, this catalyst maintains an excellent activity with negligible current density and NH 3 yield rate decays over 40 h. Moreover, as a proof-of-concept of Zn-NO battery, it delivers a high power density of 2.0 mW•cm -2 and a large NH 3 yield rate of 0.22 × 10 -7 mol•cm -2 •s -1 (corresponding to 1,077.1 g•h -1 •mg cat.-1 ), both of which are comparable to the best-reported results. Theoretical analyses confirm that the VN surface favors the activation and hydrogenation of NO by suppressing the hydrogen evolution. This work highlights that the electrochemical NO reduction is an eco-friendly and energy-efficient strategy to produce NH 3 .

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Section: Resultsmentioning

confidence: 99%

High-efficiency electrocatalytic NO reduction to NH₃by nanoporous VN

Qi¹,

Lv²,

Wei³

et al. 2022

Nano Research Energy

Self Cite

199

162

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“…Compared with pioneering works (Table S1), the bifunctional BiPdC cathode successfully achieves CO 2 –HCOOH interconversion and realizes long-time reversible reactions toward CO 2 –HCOOH. In terms of Zn–CO 2 battery discharging performance, many pioneering works of literature display a maximum power density below 0.8 mW cm –2 due to the limited discharging current and voltage causing undesired exporting power density for practical application. ,,− In fact, as a newly viable technology, the rechargeable Zn–CO 2 batteries combine sustainable electricity supplement with value-added chemical production simultaneously, revealing both electrical output and CO 2 fixation applications. ,− …”

Section: Resultsmentioning

confidence: 99%

Bifunctional BiPd Alloy Particles Anchored on Carbon Matrix for Reversible Zn–CO₂ Battery

Gao

Chen

Liu

et al. 2022

ACS Appl. Nano Mater.

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Exploring reversible Zn–CO2 batteries holds great promising potential for future CO2 fixation and energy supply. Herein, the bifunctional PdBi alloy anchoring on carbon substrate (BiPdC) is proposed for simultaneously catalyzing carbon dioxide reduction reaction (CO2RR) and formic acid oxidation (FAO). The synergistic effect between Pd and Bi overcomes the sluggish kinetics of CO2RR and FAO, causing the HCOOH Faraday efficiency (FEHCOOH) of 63.4% and 6.2 mA cm–2 current density for FAO. Benefiting from the CO2–HCOOH interconversion, the homemade reversible Zn–CO2 battery exhibits the optimal 52.6% FEHCOOH and 1.1 V voltage gap within 45 h of cycling.

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“…The corresponding Tafel plots were calculated and displayed in Figure b. The PtCu-NA has a Tafel slope of 40 mV dec –1 , which is smaller than those of Pt/C (112 mV dec –1 ) and PtCu–Cl (82 mV dec –1 ), indicating that the PtCu-NA also has a favorable reaction kinetics for HzOR. − Thus, at current density of 200 mA cm –2 , the PtCu-NA only needs an overpotential of 668 mV, which is much smaller than that of Pt/C (1081 mV). Additionally, the PtCu-NA delivered a rather flat response over 50 h at 10 mA cm –2 , thus proving its performance stability.…”

Section: Resultsmentioning

confidence: 99%

Cu₂O-Derived PtCu Nanoalloy toward Energy-Efficient Hydrogen Production via Hydrazine Electrolysis under Large Current Density

Zhang

Hou

et al. 2022

ACS Appl. Energy Mater.

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Electrocatalytic overall water splitting (OWS), powered by a renewable energy source, is a promising strategy for hydrogen production. However, the OWS system usually requires large energy consumption due to the sluggish kinetics of the anodic oxygen evolution reaction. Herein, we fabricated a PtCu nanoalloy (PtCu-NA) through a template-assisted method and evaluated its bifunctional activities for both hydrogen evolution reaction (HER) in 1 M KOH and hydrazine oxidation reaction (HzOR) in 1 M KOH + 1 M hydrazine. Remarkably, the interplanar crystal spacing of PtCu-NA was larger than that of standard PtCu and closer to that of Pt, which can be attributed to the template-assisted synthesis method. Thus, the as-prepared PtCu-NA needs low overpotentials of 224 and 668 mV to drive HER and HzOR at 100 and 200 mA cm–2, respectively, which are much better than those of commercial Pt/C (453 and 1081 mV). After coupling the HER and HzOR together, the overall hydrazine splitting (OHzS) cell needs a small voltage of 0.666 V to deliver 200 mA cm–2 in 1 M KOH + 1 M hydrazine, outperforming the Pt/C (0.792 V). Impressively, the assembly OHzS cell could run stably for more than 110 h. These performances can be attributed to the regulation of the crystal structure of the PtCu alloy and the synergistic effect between Pt and Cu.

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MoC nanocrystals confined in N-doped carbon nanosheets toward highly selective electrocatalytic nitric oxide reduction to ammonia

Cited by 71 publications

References 57 publications

High-efficiency electrocatalytic NO reduction to NH₃by nanoporous VN

High-efficiency electrocatalytic NO reduction to NH₃by nanoporous VN

Bifunctional BiPd Alloy Particles Anchored on Carbon Matrix for Reversible Zn–CO₂ Battery

Cu₂O-Derived PtCu Nanoalloy toward Energy-Efficient Hydrogen Production via Hydrazine Electrolysis under Large Current Density

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MoC nanocrystals confined in N-doped carbon nanosheets toward highly selective electrocatalytic nitric oxide reduction to ammonia

Cited by 71 publications

References 57 publications

High-efficiency electrocatalytic NO reduction to NH3by nanoporous VN

High-efficiency electrocatalytic NO reduction to NH3by nanoporous VN

Bifunctional BiPd Alloy Particles Anchored on Carbon Matrix for Reversible Zn–CO2 Battery

Cu2O-Derived PtCu Nanoalloy toward Energy-Efficient Hydrogen Production via Hydrazine Electrolysis under Large Current Density

Contact Info

Product

Resources

About

High-efficiency electrocatalytic NO reduction to NH₃by nanoporous VN

High-efficiency electrocatalytic NO reduction to NH₃by nanoporous VN

Bifunctional BiPd Alloy Particles Anchored on Carbon Matrix for Reversible Zn–CO₂ Battery

Cu₂O-Derived PtCu Nanoalloy toward Energy-Efficient Hydrogen Production via Hydrazine Electrolysis under Large Current Density