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20 results on '"Ping, Kefeng"'

7. Bimetallic metal-organic-framework-derived porous cobalt manganese oxide bifunctional oxygen electrocatalyst

Author

Yusibova, Gulnara, primary, Assafrei, Jürgen-Martin, additional, Ping, Kefeng, additional, Aruväli, Jaan, additional, Paiste, Päärn, additional, Käärik, Maike, additional, Leis, Jaan, additional, Piirsoo, Helle-Mai, additional, Tamm, Aile, additional, Kikas, Arvo, additional, Kisand, Vambola, additional, Starkov, Pavel, additional, and Kongi, Nadezda, additional

Published
2023
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8. CO2 reduction to formate on an affordable bismuth metal-organic framework based catalyst

Author

Universidad de Alicante. Departamento de Química Física, Universidad de Alicante. Instituto Universitario de Electroquímica, Avila-Bolivar, Beatriz, Cepitis, Ritums, Alam, Mahboob, Assafrei, Jürgen-Martin, Ping, Kefeng, Aruväli, Jaan, Kikas, Arvo, Kisand, Vambola, Vlassov, Sergei, Käärik, Maike, Leis, Jaan, Ivaništštev, Vladislav, Starkov, Pavel, Montiel, Vicente, Solla-Gullón, José, Kongi, Nadezda, Universidad de Alicante. Departamento de Química Física, Universidad de Alicante. Instituto Universitario de Electroquímica, Avila-Bolivar, Beatriz, Cepitis, Ritums, Alam, Mahboob, Assafrei, Jürgen-Martin, Ping, Kefeng, Aruväli, Jaan, Kikas, Arvo, Kisand, Vambola, Vlassov, Sergei, Käärik, Maike, Leis, Jaan, Ivaništštev, Vladislav, Starkov, Pavel, Montiel, Vicente, Solla-Gullón, José, and Kongi, Nadezda

Abstract

Electrochemical reduction of carbon dioxide (CO2) into green fuels and valuable chemicals is an up-and-coming method of CO2 valorization. Formate/formic acid is one the most desirable product among the many other possible chemicals that can be generated from CO2. Herein, we report on a simple and tunable method to prepare Bi-based electrocatalyst. An affordable metal-organic framework (MOF) precursor TAL-33 has been utilized upon carbonization. This MOF was fabricated from a novel modular carbon-rich ligand 1H-benzo[d]imidazole-5,6-diol and bismuth chloride. Cyclic voltammetry and chronoamperometric measurements were performed to investigate the electrocatalytic activity and selectivity towards the formate. The most promising samples have shown high Faradaic efficiency and stability. The in-depth physical characterization of catalyst structure (XPS, XRD, SEM, and TEM) was performed to investigate the structure-activity relationships. Theoretical studies have been performed to confirm that the enhanced CO2 electroreduction to formate is linked to the presence of metallic bismuth sites.

Published
2022

10. Multi-purpose heterogeneous catalyst material from an amorphous cobalt metal–organic framework

Author

Ping, Kefeng, primary, Alam, Mahboob, additional, Kahnert, Sean Ray, additional, Bhadoria, Rohit, additional, Mere, Arvo, additional, Mikli, Valdek, additional, Käärik, Maike, additional, Aruväli, Jaan, additional, Paiste, Päärn, additional, Kikas, Arvo, additional, Kisand, Vambola, additional, Järving, Ivar, additional, Leis, Jaan, additional, Kongi, Nadežda, additional, and Starkov, Pavel, additional

Published
2021
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15. Fused Hybrid Linkers for Metal–Organic Framework-Derived Bifunctional Oxygen Electrocatalysts

Author

Ping, Kefeng, primary, Braschinsky, Alan, additional, Alam, Mahboob, additional, Bhadoria, Rohit, additional, Mikli, Valdek, additional, Mere, Arvo, additional, Aruväli, Jaan, additional, Paiste, Päärn, additional, Vlassov, Sergei, additional, Kook, Mati, additional, Rähn, Mihkel, additional, Sammelselg, Väino, additional, Tammeveski, Kaido, additional, Kongi, Nadežda, additional, and Starkov, Pavel, additional

Published
2019
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16. Sorption of humic acid to layered double hydroxides prepared through ion thermal method

Author

Qiu Xinhong, Ping KeFeng, Chen Fengxi, and Zhong Pei

Subjects
chemistry.chemical_classification, Materials science, Kinetics, Layered double hydroxides, Sorption, 02 engineering and technology, engineering.material, 010402 general chemistry, 021001 nanoscience & nanotechnology, 01 natural sciences, 0104 chemical sciences, law.invention, Ion, Chemical engineering, chemistry, law, engineering, Humic acid, Calcination, Water treatment, Particle size, 0210 nano-technology
Published
2017

20. CO2Reduction to Formate on an Affordable Bismuth Metal-Organic Framework Based Catalyst

Author

Ávila-Bolívar, Beatriz, Cepitis, Ritums, Alam, Mahboob, Assafrei, Jürgen-Martin, Ping, Kefeng, Aruväli, Jaan, Kikas, Arvo, Kisand, Vambola, Vlassov, Sergei, Käärik, Maike, Leis, Jaan, Ivaništštev, Vladislav, Starkov, Pavel, Montiel, Vicente, Solla-Gullón, José, and Kongi, Nadezda

Abstract

Electrochemical reduction of carbon dioxide (CO2) into green fuels and valuable chemicals is an up-and-coming method of CO2valorization. Formate/formic acid is one the most desirable product among the many other possible chemicals that can be generated from CO2. Herein, we report on a simple and tunable method to prepare Bi-based electrocatalyst. An affordable metal-organic framework (MOF) precursor TAL-33 has been utilized upon carbonization. This MOF was fabricated from a novel modular carbon-rich ligand 1H-benzo[d]imidazole-5,6-diol and bismuth chloride. Cyclic voltammetry and chronoamperometric measurements were performed to investigate the electrocatalytic activity and selectivity towards the formate. The most promising samples have shown high Faradaic efficiency and stability. The in-depth physical characterization of catalyst structure (XPS, XRD, SEM, and TEM) was performed to investigate the structure-activity relationships. Theoretical studies have been performed to confirm that the enhanced CO2electroreduction to formate is linked to the presence of metallic bismuth sites.

Published
2022
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