Multilayered Molybdate Microflowers Fabricated by One‐Pot Reaction for Efficient Water Splitting
Abstract The development of high‐performance, low‐cost and rapid‐production bifunctional electrocatalysts towards overall water splitting still poses huge challenges. Herein, the authors utilize a facile hydrothermal method to synthesize a novel structure of Co‐doped ammonium lanthanum molybdate on...
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| Format: | Article |
| Language: | English |
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Wiley
2023-05-01
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| Series: | Advanced Science |
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| Online Access: | https://doi.org/10.1002/advs.202206952 |
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| author | Jingyi Wang Jianrui Feng Yuying Li Feili Lai Gui‐Chang Wang Tianxi Liu Jiajia Huang Guanjie He |
| author_facet | Jingyi Wang Jianrui Feng Yuying Li Feili Lai Gui‐Chang Wang Tianxi Liu Jiajia Huang Guanjie He |
| author_sort | Jingyi Wang |
| collection | DOAJ |
| description | Abstract The development of high‐performance, low‐cost and rapid‐production bifunctional electrocatalysts towards overall water splitting still poses huge challenges. Herein, the authors utilize a facile hydrothermal method to synthesize a novel structure of Co‐doped ammonium lanthanum molybdate on Ni foams (Co‐ALMO@NF) as self‐supported electrocatalysts. Owing to large active surfaces, lattice defect and conductive channel for rapid charge transport, Co‐ALMO@NF exhibits good electrocatalytic performances which requires only 349/341 mV to achieve a high current density of 600 mA cm−2 for hydrogen evolution reaction (HER) and oxygen evolution reaction (OER), respectively. Besides, a low cell voltage of 1.52 V is required to reach the current density of 10 mA cm−2 in alkaline medium along with an excellent long‐term stability for two‐electrode configurations. Density functional theory calculations are performed to reveal the reaction mechanism on Co‐ALMO@NF, which shows that the Mo site is the most favorable ones for HER, while the introduction of Co is beneficial to reduce the adsorption intensity on the surface of Co‐ALMO@NF, thus accelerating OER process. This work highlighted the importance of the structural design for self‐supporting electrocatalysts. |
| format | Article |
| id | doaj-art-8154fece92cd470b97c3308666a3483f |
| institution | DOAJ |
| issn | 2198-3844 |
| language | English |
| publishDate | 2023-05-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advanced Science |
| spelling | doaj-art-8154fece92cd470b97c3308666a3483f2025-08-20T03:04:57ZengWileyAdvanced Science2198-38442023-05-011014n/an/a10.1002/advs.202206952Multilayered Molybdate Microflowers Fabricated by One‐Pot Reaction for Efficient Water SplittingJingyi Wang0Jianrui Feng1Yuying Li2Feili Lai3Gui‐Chang Wang4Tianxi Liu5Jiajia Huang6Guanjie He7School of Chemical Engineering Zhengzhou University Zhengzhou 450001 P. R. ChinaDepartment of Chemical Engineering University College London London WC1E 6 EB UKSchool of Chemical Engineering Zhengzhou University Zhengzhou 450001 P. R. ChinaDepartment of Chemistry KU Leuven Celestijnenlaan 200F Leuven 3001 BelgiumKey Laboratory of Advanced Energy Materials Chemistry (Ministry of Education) and the Tianjin Key Lab and Molecule‐Based Material Chemistry College of Chemistry Nankai University Tianjin 300071 ChinaKey Laboratory of Synthetic and Biological Colloids Ministry of Education School of Chemical and Material Engineering International Joint Research Laboratory for Nano Energy Composites Jiangnan University Wuxi 214122 P. R. ChinaSchool of Chemical Engineering Zhengzhou University Zhengzhou 450001 P. R. ChinaDepartment of Chemical Engineering University College London London WC1E 6 EB UKAbstract The development of high‐performance, low‐cost and rapid‐production bifunctional electrocatalysts towards overall water splitting still poses huge challenges. Herein, the authors utilize a facile hydrothermal method to synthesize a novel structure of Co‐doped ammonium lanthanum molybdate on Ni foams (Co‐ALMO@NF) as self‐supported electrocatalysts. Owing to large active surfaces, lattice defect and conductive channel for rapid charge transport, Co‐ALMO@NF exhibits good electrocatalytic performances which requires only 349/341 mV to achieve a high current density of 600 mA cm−2 for hydrogen evolution reaction (HER) and oxygen evolution reaction (OER), respectively. Besides, a low cell voltage of 1.52 V is required to reach the current density of 10 mA cm−2 in alkaline medium along with an excellent long‐term stability for two‐electrode configurations. Density functional theory calculations are performed to reveal the reaction mechanism on Co‐ALMO@NF, which shows that the Mo site is the most favorable ones for HER, while the introduction of Co is beneficial to reduce the adsorption intensity on the surface of Co‐ALMO@NF, thus accelerating OER process. This work highlighted the importance of the structural design for self‐supporting electrocatalysts.https://doi.org/10.1002/advs.202206952bifunctional electrocatalystdopinglanthanum ammonium molybdatelattice defectsmicroflowerswater splitting |
| spellingShingle | Jingyi Wang Jianrui Feng Yuying Li Feili Lai Gui‐Chang Wang Tianxi Liu Jiajia Huang Guanjie He Multilayered Molybdate Microflowers Fabricated by One‐Pot Reaction for Efficient Water Splitting Advanced Science bifunctional electrocatalyst doping lanthanum ammonium molybdate lattice defects microflowers water splitting |
| title | Multilayered Molybdate Microflowers Fabricated by One‐Pot Reaction for Efficient Water Splitting |
| title_full | Multilayered Molybdate Microflowers Fabricated by One‐Pot Reaction for Efficient Water Splitting |
| title_fullStr | Multilayered Molybdate Microflowers Fabricated by One‐Pot Reaction for Efficient Water Splitting |
| title_full_unstemmed | Multilayered Molybdate Microflowers Fabricated by One‐Pot Reaction for Efficient Water Splitting |
| title_short | Multilayered Molybdate Microflowers Fabricated by One‐Pot Reaction for Efficient Water Splitting |
| title_sort | multilayered molybdate microflowers fabricated by one pot reaction for efficient water splitting |
| topic | bifunctional electrocatalyst doping lanthanum ammonium molybdate lattice defects microflowers water splitting |
| url | https://doi.org/10.1002/advs.202206952 |
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