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Copper confined in ...
Copper confined in vesicle-like BCN cavities promotes electrochemical reduction of nitrate to ammonia in water
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- Zhao, Xue (författare)
- Wuhan Univ, Coll Chem & Mol Sci, Wuhan 430072, Peoples R China.;Yunnan Univ, Sch Ecol & Environm Sci, Kunming 650504, Yunnan, Peoples R China.
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- Hu, Guangzhi (författare)
- Yunnan Univ, Sch Ecol & Environm Sci, Kunming 650504, Yunnan, Peoples R China.;Zhengzhou Univ, Coll Chem & Mol Engn, Zhengzhou 450000, Peoples R China.
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- Tan, Fang (författare)
- Yunnan Univ, Sch Ecol & Environm Sci, Kunming 650504, Yunnan, Peoples R China.
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- Zhang, Shusheng (författare)
- Zhengzhou Univ, Coll Chem & Mol Engn, Zhengzhou 450000, Peoples R China.
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- Wang, Xinzhong (författare)
- Shenzhen Inst Informat Technol, Shenzhen 518172, Guangdong, Peoples R China.
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- Hu, Xun (författare)
- Univ Jinan, Sch Mat Sci & Engn, Jinan 250022, Shandong, Peoples R China.
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- Kuklin, Artem V. (författare)
- Uppsala universitet,Institutionen för fysik och astronomi,Siberian Fed Univ, Int Res Ctr Spect & Quantum Chem IRC SQC, 79 Svobodny Pr, Krasnoyarsk 660041, Russia.;Uppsala Univ, Dept Phys & Astron, Box 516, SE-75120 Uppsala, Sweden.
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- Baryshnikov, Glib (författare)
- Linköpings universitet,Laboratoriet för organisk elektronik,Tekniska fakulteten,Linköping Univ, ITN, Lab Organ Elect, S-60174 Norrköping, Sweden.
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- Ågren, Hans (författare)
- Uppsala universitet,Kemisk och biomolekylär fysik
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- Zhou, Xiaohai (författare)
- Wuhan Univ, Coll Chem & Mol Sci, Wuhan 430072, Peoples R China.
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- Zhang, Haibo (författare)
- Wuhan Univ, Coll Chem & Mol Sci, Wuhan 430072, Peoples R China.
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Wuhan Univ, Coll Chem & Mol Sci, Wuhan 430072, Peoples R China;Yunnan Univ, Sch Ecol & Environm Sci, Kunming 650504, Yunnan, Peoples R China. Yunnan Univ, Sch Ecol & Environm Sci, Kunming 650504, Yunnan, Peoples R China.;Zhengzhou Univ, Coll Chem & Mol Engn, Zhengzhou 450000, Peoples R China. (creator_code:org_t)
- 2021
- 2021
- Engelska.
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Ingår i: Journal of Materials Chemistry A. - : ROYAL SOC CHEMISTRY. - 2050-7488 .- 2050-7496. ; 9:41, s. 23675-23686
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https://doi.org/10.1...
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https://urn.kb.se/re...
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Abstract
Ämnesord
Stäng
- Electrochemical methods to convert high-concentration nitrates present in sewage into high-value-added ammonia do not just alleviate the problem of environmental pollution but also provide less energy-intensive alternatives to the Haber-Bosch process. In this work, a metal-boron organic polymer precursor was annealed at high temperature to obtain copper nanoparticles encapsulated in a vesicle-like BCN matrix (BCN@Cu). In the electrochemical reduction of nitrate (E-NIRR), this species exhibited excellent catalytic activity. Specifically, the ammonia yields of BCN@Cu under applied potentials of -0.3 V, -0.4 V, -0.5 V, and -0.6 V versus the reversible hydrogen electrode were 271.1 mu mol h(-1) mg(cat.)(-1), 354.8 mu mol h(-1) mg(cat.)(-1), 435.6 mu mol h(-1) mg(cat.)(-1), and 576.2 mu mol h(-1) mg(cat.)(-1), respectively, and the corresponding Faraday efficiencies were 86.3%, 88.0%, 89.3%, and 88.9%. Isotope labeling experiments with (NO3-)-N-15 confirmed that the detected ammonia had originated from the electrochemical reduction of NO3- on the catalyst surface. Moreover, the E-NIRR activity of BCN@Cu remained high even after using it ten consecutive times or 20 h of continuous operation, suggesting the practicality of the industrial application of BCN@Cu. The presence of copper was key in determining BCN@Cus E-NIRR activity, while the presence of boron greatly improved its catalytic performance. Furthermore, density functional theory calculations indicated that BCN does not itself promote the reaction but rather assists the dispersion of Cu nanoparticles, thereby expanding the catalysts active surface area.
Ämnesord
- NATURVETENSKAP -- Kemi -- Annan kemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Other Chemistry Topics (hsv//eng)
- NATURVETENSKAP -- Kemi -- Materialkemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Materials Chemistry (hsv//eng)
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Till lärosätets databas
- Av författaren/redakt...
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Zhao, Xue
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Hu, Guangzhi
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Tan, Fang
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Zhang, Shusheng
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Wang, Xinzhong
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Hu, Xun
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visa fler...
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Kuklin, Artem V.
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Baryshnikov, Gli ...
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Ågren, Hans
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Zhou, Xiaohai
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Zhang, Haibo
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- Om ämnet
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- NATURVETENSKAP
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NATURVETENSKAP
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och Kemi
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och Annan kemi
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- NATURVETENSKAP
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NATURVETENSKAP
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och Kemi
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och Materialkemi
- Artiklar i publikationen
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Journal of Mater ...
- Av lärosätet
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Linköpings universitet
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Uppsala universitet