Sajid Mahmood, Osamah Alduhaish, Muhammad Ammar, Shahid Khan, Niaz Ahmad, Ghulam Abbas Ashraf, Noshin Afshan, Noor Hassan
{"title":"支持镍泡沫纳米复合材料的铂改性 Fe3O4 电催化硝酸盐还原成氨","authors":"Sajid Mahmood, Osamah Alduhaish, Muhammad Ammar, Shahid Khan, Niaz Ahmad, Ghulam Abbas Ashraf, Noshin Afshan, Noor Hassan","doi":"10.1007/s12678-023-00851-w","DOIUrl":null,"url":null,"abstract":"<div><p>Effective and sustainable electrocatalytic reduction of nitrate is greatly desired to solve the problem of global water contamination and provide a promising way to generate fossil-free ammonia. In this regard, Pt-Fe<sub>3</sub>O<sub>4</sub> nanoparticles are decorated on Ni foam (NF) using the hydrothermal method to achieve Pt-Fe<sub>3</sub>O<sub>4</sub>/NF nanocomposite electrocatalyst. Various characterization techniques investigate the structural and morphological properties of Pt-Fe<sub>3</sub>O<sub>4</sub>/NF nanocomposite. Benefiting from the small size of Pt and Fe nanoparticles, the Pt-Fe<sub>3</sub>O<sub>4</sub>/NF nanocomposite reveals excellent performance for electrocatalytic nitrate reduction with an NH<sub>4</sub><sup>+</sup> yield rate of 0.301 mmol h<sup>−1</sup> cm<sup>−2</sup> (5.418 mg h<sup>−1</sup> mg<sup>−1</sup><sub>cat.</sub>) and Faradaic efficiency of 80.7% at − 0.8 V vs. RHE. Pt-Fe<sub>3</sub>O<sub>4</sub>/NF nanocomposite exhibits unique metallic properties and abundant surface sites due to a synergistic effect of Pt-Fe nanostructure favorable for the electrochemical and hydrogenation reduction processes. Moreover, Pt-Fe<sub>3</sub>O<sub>4</sub>/NF nanocomposite reveals outstanding long-term stability and durability. Isotope labeling experiments are performed, and results demonstrate that ammonia originates from nitrate reduction. These favorable outcomes of Pt-Fe<sub>3</sub>O<sub>4</sub>/NF nanocomposite emphasize its potential for treating nitrate wastewater for ammonia recovery and prospects for its industrial applications.</p><h3>Graphical Abstract</h3><p>An efficient electrocatalyst was prepared by fabricating Pt-Fe<sub>3</sub>O<sub>4</sub> on NF using hydrothermal method for electrochemical nitrate reduction to ammonia. Pt-Fe<sub>3</sub>O<sub>4</sub>/NF showed a remarkable NH<sub>4</sub><sup>+</sup> yield rate with high Faradaic efficiency at − 0.8 V vs. RHE. Also, the Pt-Fe<sub>3</sub>O<sub>4</sub>/NF nanocomposite exhibited outstanding stability and durability.</p><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":535,"journal":{"name":"Electrocatalysis","volume":"15 1","pages":"159 - 170"},"PeriodicalIF":2.7000,"publicationDate":"2023-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Pt-modified Fe3O4 Supported on Ni Foam Nanocomposite for Electrocatalytic Nitrate Reduction to Ammonia\",\"authors\":\"Sajid Mahmood, Osamah Alduhaish, Muhammad Ammar, Shahid Khan, Niaz Ahmad, Ghulam Abbas Ashraf, Noshin Afshan, Noor Hassan\",\"doi\":\"10.1007/s12678-023-00851-w\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>Effective and sustainable electrocatalytic reduction of nitrate is greatly desired to solve the problem of global water contamination and provide a promising way to generate fossil-free ammonia. In this regard, Pt-Fe<sub>3</sub>O<sub>4</sub> nanoparticles are decorated on Ni foam (NF) using the hydrothermal method to achieve Pt-Fe<sub>3</sub>O<sub>4</sub>/NF nanocomposite electrocatalyst. Various characterization techniques investigate the structural and morphological properties of Pt-Fe<sub>3</sub>O<sub>4</sub>/NF nanocomposite. Benefiting from the small size of Pt and Fe nanoparticles, the Pt-Fe<sub>3</sub>O<sub>4</sub>/NF nanocomposite reveals excellent performance for electrocatalytic nitrate reduction with an NH<sub>4</sub><sup>+</sup> yield rate of 0.301 mmol h<sup>−1</sup> cm<sup>−2</sup> (5.418 mg h<sup>−1</sup> mg<sup>−1</sup><sub>cat.</sub>) and Faradaic efficiency of 80.7% at − 0.8 V vs. RHE. Pt-Fe<sub>3</sub>O<sub>4</sub>/NF nanocomposite exhibits unique metallic properties and abundant surface sites due to a synergistic effect of Pt-Fe nanostructure favorable for the electrochemical and hydrogenation reduction processes. Moreover, Pt-Fe<sub>3</sub>O<sub>4</sub>/NF nanocomposite reveals outstanding long-term stability and durability. Isotope labeling experiments are performed, and results demonstrate that ammonia originates from nitrate reduction. These favorable outcomes of Pt-Fe<sub>3</sub>O<sub>4</sub>/NF nanocomposite emphasize its potential for treating nitrate wastewater for ammonia recovery and prospects for its industrial applications.</p><h3>Graphical Abstract</h3><p>An efficient electrocatalyst was prepared by fabricating Pt-Fe<sub>3</sub>O<sub>4</sub> on NF using hydrothermal method for electrochemical nitrate reduction to ammonia. Pt-Fe<sub>3</sub>O<sub>4</sub>/NF showed a remarkable NH<sub>4</sub><sup>+</sup> yield rate with high Faradaic efficiency at − 0.8 V vs. RHE. 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Pt-modified Fe3O4 Supported on Ni Foam Nanocomposite for Electrocatalytic Nitrate Reduction to Ammonia
Effective and sustainable electrocatalytic reduction of nitrate is greatly desired to solve the problem of global water contamination and provide a promising way to generate fossil-free ammonia. In this regard, Pt-Fe3O4 nanoparticles are decorated on Ni foam (NF) using the hydrothermal method to achieve Pt-Fe3O4/NF nanocomposite electrocatalyst. Various characterization techniques investigate the structural and morphological properties of Pt-Fe3O4/NF nanocomposite. Benefiting from the small size of Pt and Fe nanoparticles, the Pt-Fe3O4/NF nanocomposite reveals excellent performance for electrocatalytic nitrate reduction with an NH4+ yield rate of 0.301 mmol h−1 cm−2 (5.418 mg h−1 mg−1cat.) and Faradaic efficiency of 80.7% at − 0.8 V vs. RHE. Pt-Fe3O4/NF nanocomposite exhibits unique metallic properties and abundant surface sites due to a synergistic effect of Pt-Fe nanostructure favorable for the electrochemical and hydrogenation reduction processes. Moreover, Pt-Fe3O4/NF nanocomposite reveals outstanding long-term stability and durability. Isotope labeling experiments are performed, and results demonstrate that ammonia originates from nitrate reduction. These favorable outcomes of Pt-Fe3O4/NF nanocomposite emphasize its potential for treating nitrate wastewater for ammonia recovery and prospects for its industrial applications.
Graphical Abstract
An efficient electrocatalyst was prepared by fabricating Pt-Fe3O4 on NF using hydrothermal method for electrochemical nitrate reduction to ammonia. Pt-Fe3O4/NF showed a remarkable NH4+ yield rate with high Faradaic efficiency at − 0.8 V vs. RHE. Also, the Pt-Fe3O4/NF nanocomposite exhibited outstanding stability and durability.
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Electrocatalysis is cross-disciplinary in nature, and attracts the interest of chemists, physicists, biochemists, surface and materials scientists, and engineers. Electrocatalysis provides the unique international forum solely dedicated to the exchange of novel ideas in electrocatalysis for academic, government, and industrial researchers. Quick publication of new results, concepts, and inventions made involving Electrocatalysis stimulates scientific discoveries and breakthroughs, promotes the scientific and engineering concepts that are critical to the development of novel electrochemical technologies.
Electrocatalysis publishes original submissions in the form of letters, research papers, review articles, book reviews, and educational papers. Letters are preliminary reports that communicate new and important findings. Regular research papers are complete reports of new results, and their analysis and discussion. Review articles critically and constructively examine development in areas of electrocatalysis that are of broad interest and importance. Educational papers discuss important concepts whose understanding is vital to advances in theoretical and experimental aspects of electrochemical reactions.
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