High-efficiency electroreduction of nitrite to ammonia on a Cu@TiO<sub>2</sub> nanobelt array

Ouyang, Ling; Fan, Xiaoya; Li, Zerong; He, Xun; Sun, Shengjun; Cai, Zhengwei; Luo, Yongsong; Zheng, Dongdong; Ying, Binwu; Zhang, Jing; Alshehri, Abdulmohsen Ali; Wang, Yan; Ma, Ke; Sun, Xuping

doi:10.1039/d2cc06261e

Cited by 38 publications

(23 citation statements)

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“…In addition to carbon materials as supporting substrates, three‐dimensional nanoarray grown on conductive substrate is another attractive one, which is associated with vertically aligned nanoarrays providing sufficient surface area and space to anchor the active nanoparticles, which allows electrolytes arrive to catalytic centers. In this respect, our group fabricated TiO 2 nanobelt array by facile hydrothermal method and adopted as a substrate to support Co, [ 43 ] Ni, [ 44 ] and Cu [ 45 ] nanoparticles (M@TiO 2 ) for direct conversion of NO 2 − /NO 3 − to NH 3 under ambient conditions. Taking Cu as an example, Cu nanoparticles were uniformly dispersed on the surface of TiO 2 nanobelt array (Figure 4f).…”

Section: Advances In No2−rr To Nh3 Electrocatalystsmentioning

confidence: 99%

Recent Advance in Heterogenous Electrocatalysts for Highly Selective Nitrite Reduction to Ammonia Under Ambient Condition

et al. 2023

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Industrial ammonia production mainly relies on the conventional Haber–Bosch process accompanied by high energy consumption and plentiful carbon dioxide emissions, which triggered the recent interest to explore more energy‐efficient and environmentally benign alternatives. Very recently, electrochemical nitrite reduction in an aqueous medium promises new opportunities for advanced, energy‐efficient, and sustainable ammonia production at ambient conditions. The ammonia formation rate and Faradic efficiency are strongly associated with the adopted electrocatalysts; therefore, striving for high‐efficient electrocatalysts is the key to sustainable ammonia production via the electrochemical nitrite reduction reaction. Herein, a critical overview of recent advances in electrochemical nitrite reduction reaction to ammonia is presented, highlighting the latest innovative heterogenous electrocatalysts including noble metal catalysts, transition‐metal‐based catalysts, and their compounds. Meanwhile, the possible reaction pathway of nitrite electroreduction to ammonia, ammonia detection, and catalytic activity descriptor are briefly summarized. Finally, the perspective and research challenges of electrocatalysts that convert nitrite to ammonia are outlined, increasing their contributions in the route of realizing a neutral carbon footprint.

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Section: Advances In No2−rr To Nh3 Electrocatalystsmentioning

confidence: 99%

Recent Advance in Heterogenous Electrocatalysts for Highly Selective Nitrite Reduction to Ammonia Under Ambient Condition

et al. 2023

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“…CuO has inspired industry and scientists because of these unique properties compared to existing metal oxides. − Films made from CuO are used in a wide variety of technological fields, including superconductors, lithium-ion batteries, diodes, photodetectors, gas sensors, catalysis, biosensors, and solar cell applications. In addition, there are electrochemical applications in the literature where copper is used as an electrocatalyst for nitrite-to-ammonium conversion and nitrogen-to-ammonium conversion. − CuO films are especially preferred in sensor applications due to their large surface areas. Larger surface areas in sensors mean a greater probability of adsorption resulting in a better response. − …”

Section: Introductionmentioning

confidence: 99%

Nanostructured CuO Thin-Film-Based Conductometric Sensors for Real-Time Tracking of Sweat Loss

et al. 2023

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Enhanced sweat sensors lead to real-time, sustained, noninvasive tracking of sweat loss, ensure insight into individual health conditions at the molecular level, and have obtained prominent interest for their hopeful implementations in customized health tracking. Metal-oxide-based nanostructured electrochemical amperometric sensing materials are the best selection for continuous sweat monitoring devices owing to their high stability, high-sensing capacity, cost-effectiveness, miniaturization, and wide applicability. In this research, CuO thin films have been fabricated by successive ionic layer adsorption and reaction technique (SILAR) with and without the addition of Lawsonia inermis L. (Henna, (LiL)) leaf extract (C10H6O3, 2-hydroxy-1,4-naphthoquinone) with a high-sensitive and rapid response for sweat solution. Despite the pristine film being responsive to the 65.50 mM sweat solution (S = 2.66), the response characteristic improves to 3.95 for the 1.0% LiL-implemented CuO film. Unmodified, 1.0% LiL and 3.0% LiL-substituted thin-film materials assure considerable linearity with linear regression ranges, R 2, of 0.989, 0.997, and 0.998, respectively. It is noteworthy here that this research aims to determine an enhanced system that could potentially be implemented in real-life sweat-tracking administrations. Real-time sweat loss tracking capabilities of CuO samples was found to be promising. Derived from these outcomes, we concluded that the fabricated nanostructured CuO-based sensing system is a useful application for the continuous observation of sweat loss as a biological argument and compatibility with other microelectronic technologies.

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“…This process is extremely energy demanding and produces an extravagant amount of greenhouse gases (CO 2 ) into the atmosphere. , To produce NH 3 in the industrial scale, the Haber–Bosch process is employed, where raw materials (N 2 and H 2 ) are treated at a high temperature (700 K) and pressure (150 atm). This process consumes 1% of the total global energy and produces 1.9 metric ton of greenhouse gas (CO 2 ) per metric ton of NH 3 synthesis. , Current studies on ammonia synthesis (computational study and experimental investigation) may substitute the Haber–Bosch process. − The deletion of the dual step HNO 3 synthesis method forms a mandatory requirement to address the issue and provide an alternate sustainable solution yet catering to the demand of the market . Electrocatalytic dinitrogen oxidation reaction (N 2 OR) using an electrocatalyst under ambient conditions is an optimistically promising alternative to develop a sustainable nitrate product using various heterogeneous catalysts. − Electrocatalytic N 2 oxidation processes follow a two-step pathway.…”

Section: Introductionmentioning

confidence: 99%

Selective Electrocatalytic Oxidation of Nitrogen to Nitric Acid Using Manganese Phthalocyanine

Adalder

Paul

Ghorai

et al. 2023

ACS Appl. Mater. Interfaces

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Ammonia is produced through the energy-intensive Haber–Bosch process, which undergoes catalytic oxidation for the production of commercial nitric acid by the senescent Ostwald process. The two energy-intensive industrial processes demand for process sustainability. Hence, single-step electrocatalysis offers a promising approach toward a more environmentally friendly solution. Herein, we report a 10-electron pathway associated one-step electrochemical dinitrogen oxidation reaction (N2OR) to nitric acid by manganese phthalocyanine (MnPc) hollow nano-structures under ambient conditions. The catalyst delivers a nitric acid yield of 513.2 μmol h–1 gcat –1 with 33.9% Faradaic efficiency @ 2.1 V versus reversible hydrogen electrode. The excellent N2OR performances are achieved due to the specific-selectivity, presence of greater number of exposed active sites, recyclability, and long period stability. The extended X-ray absorption fine structure confirms that Mn atoms are coordinated to the pyrrolic and pyridinic nitrogen via Mn–N4 coordination. Density functional theory-based theoretical calculations confirm that the Mn–N4 site of MnPc is the main active center for N2OR, which suppresses the oxygen evolution reaction. This work provides a new arena about the successful example of one step nitric acid production utilizing a Mn–N4 active site-based metal phthalocyanine electrocatalyst by dinitrogen oxidation for the development of a carbon-neutral sustainable society.

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High-efficiency electroreduction of nitrite to ammonia on a Cu@TiO₂ nanobelt array

Abstract: Electrochemical nitrite (NO2−) reduction is a potential and sustainable route to produce high-value ammonia (NH3), but it requires highly active electrocatalysts. Herein, Cu nanoparticles anchored on TiO2 nanobelt array on...

Cited by 38 publications

References 36 publications

Recent Advance in Heterogenous Electrocatalysts for Highly Selective Nitrite Reduction to Ammonia Under Ambient Condition

Recent Advance in Heterogenous Electrocatalysts for Highly Selective Nitrite Reduction to Ammonia Under Ambient Condition

Nanostructured CuO Thin-Film-Based Conductometric Sensors for Real-Time Tracking of Sweat Loss

Selective Electrocatalytic Oxidation of Nitrogen to Nitric Acid Using Manganese Phthalocyanine

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High-efficiency electroreduction of nitrite to ammonia on a Cu@TiO2 nanobelt array

Abstract: Electrochemical nitrite (NO2−) reduction is a potential and sustainable route to produce high-value ammonia (NH3), but it requires highly active electrocatalysts. Herein, Cu nanoparticles anchored on TiO2 nanobelt array on...

Cited by 38 publications

References 36 publications

Recent Advance in Heterogenous Electrocatalysts for Highly Selective Nitrite Reduction to Ammonia Under Ambient Condition

Recent Advance in Heterogenous Electrocatalysts for Highly Selective Nitrite Reduction to Ammonia Under Ambient Condition

Nanostructured CuO Thin-Film-Based Conductometric Sensors for Real-Time Tracking of Sweat Loss

Selective Electrocatalytic Oxidation of Nitrogen to Nitric Acid Using Manganese Phthalocyanine

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High-efficiency electroreduction of nitrite to ammonia on a Cu@TiO₂ nanobelt array