Confined growth of pyridinic N–Mo₂C sites on MXenes for hydrogen evolution
Developing low-cost and high-performance hydrogen evolution reaction (HER) electrocatalysts is a key research area for scalable hydrogen production from water electrolysis. Here, a hybrid of nitrogen-doped carbon encapsulated Mo₂C nanodots on Ti₃C₂Tx MXene (Mo₂C/Ti₃C₂Tx@NC) is developed through in s...
| Main Authors: | , , , , , , , , , |
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| Format: | Journal Article |
| Language: | English |
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2022
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| Online Access: | https://hdl.handle.net/10356/154914 |
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| author | Wang, Hao Lin, Yanping Liu, Shuyuan Li, Jianmin Bu, Liangmin Chen, Jianmei Xiao, Xu Choi, Jin-Ho Gao, Lijun Lee, Jong-Min |
| author2 | School of Chemical and Biomedical Engineering |
| author_facet | School of Chemical and Biomedical Engineering Wang, Hao Lin, Yanping Liu, Shuyuan Li, Jianmin Bu, Liangmin Chen, Jianmei Xiao, Xu Choi, Jin-Ho Gao, Lijun Lee, Jong-Min |
| author_sort | Wang, Hao |
| collection | NTU |
| description | Developing low-cost and high-performance hydrogen evolution reaction (HER) electrocatalysts is a key research area for scalable hydrogen production from water electrolysis. Here, a hybrid of nitrogen-doped carbon encapsulated Mo₂C nanodots on Ti₃C₂Tx MXene (Mo₂C/Ti₃C₂Tx@NC) is developed through in situ polymerization of dopamine and a Mo precursor on the Ti₃C₂Tx MXene surface. During the annealing treatment, the polydopamine plays multiple roles in forming N-doped carbon, confining MoO₄²⁻ ions into ultrasmall Mo₂C nanodots, and stabilizing the MXene flakes against spontaneous oxidation. The as-synthesized hybrid exhibits excellent HER activity in acidic electrolyte with an overpotential of 53 mV at 10 mA cm(⁻²) and excellent stability over 30 hours. The combination of experiments and simulations demonstrates that pyridinic N-doped carbon coated Mo₂C nanodots serve as the active sites and Ti₃C₂Tx MXene facilitates the charge transfer, synergistically contributing to the superior HER performance. |
| first_indexed | 2024-10-01T04:30:28Z |
| format | Journal Article |
| id | ntu-10356/154914 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T04:30:28Z |
| publishDate | 2022 |
| record_format | dspace |
| spelling | ntu-10356/1549142022-01-14T06:16:41Z Confined growth of pyridinic N–Mo₂C sites on MXenes for hydrogen evolution Wang, Hao Lin, Yanping Liu, Shuyuan Li, Jianmin Bu, Liangmin Chen, Jianmei Xiao, Xu Choi, Jin-Ho Gao, Lijun Lee, Jong-Min School of Chemical and Biomedical Engineering Engineering::Chemical engineering Oxygen Evolution Doped Carbon Developing low-cost and high-performance hydrogen evolution reaction (HER) electrocatalysts is a key research area for scalable hydrogen production from water electrolysis. Here, a hybrid of nitrogen-doped carbon encapsulated Mo₂C nanodots on Ti₃C₂Tx MXene (Mo₂C/Ti₃C₂Tx@NC) is developed through in situ polymerization of dopamine and a Mo precursor on the Ti₃C₂Tx MXene surface. During the annealing treatment, the polydopamine plays multiple roles in forming N-doped carbon, confining MoO₄²⁻ ions into ultrasmall Mo₂C nanodots, and stabilizing the MXene flakes against spontaneous oxidation. The as-synthesized hybrid exhibits excellent HER activity in acidic electrolyte with an overpotential of 53 mV at 10 mA cm(⁻²) and excellent stability over 30 hours. The combination of experiments and simulations demonstrates that pyridinic N-doped carbon coated Mo₂C nanodots serve as the active sites and Ti₃C₂Tx MXene facilitates the charge transfer, synergistically contributing to the superior HER performance. Ministry of Education (MOE) This work was nancially supported by the AcRF Tier 1 grant (RG105/19) from the Ministry of Education in Singapore and the National Natural Science Foundation of China (U1401248, 11874044). The DFT calculations were supported by TianHe-1(A) at the NSCC in Tianjin. The authors also thank Prof. Yury Gogotsi from Drexel University for helpful comments on the manuscript. 2022-01-14T06:16:41Z 2022-01-14T06:16:41Z 2020 Journal Article Wang, H., Lin, Y., Liu, S., Li, J., Bu, L., Chen, J., Xiao, X., Choi, J., Gao, L. & Lee, J. (2020). Confined growth of pyridinic N–Mo₂C sites on MXenes for hydrogen evolution. Journal of Materials Chemistry A, 8(15), 7109-7116. https://dx.doi.org/10.1039/D0TA01697G 2050-7488 https://hdl.handle.net/10356/154914 10.1039/D0TA01697G 15 8 7109 7116 en RG105/19 Journal of Materials Chemistry A © The Royal Society of Chemistry 2020. All rights reserved. |
| spellingShingle | Engineering::Chemical engineering Oxygen Evolution Doped Carbon Wang, Hao Lin, Yanping Liu, Shuyuan Li, Jianmin Bu, Liangmin Chen, Jianmei Xiao, Xu Choi, Jin-Ho Gao, Lijun Lee, Jong-Min Confined growth of pyridinic N–Mo₂C sites on MXenes for hydrogen evolution |
| title | Confined growth of pyridinic N–Mo₂C sites on MXenes for hydrogen evolution |
| title_full | Confined growth of pyridinic N–Mo₂C sites on MXenes for hydrogen evolution |
| title_fullStr | Confined growth of pyridinic N–Mo₂C sites on MXenes for hydrogen evolution |
| title_full_unstemmed | Confined growth of pyridinic N–Mo₂C sites on MXenes for hydrogen evolution |
| title_short | Confined growth of pyridinic N–Mo₂C sites on MXenes for hydrogen evolution |
| title_sort | confined growth of pyridinic n mo₂c sites on mxenes for hydrogen evolution |
| topic | Engineering::Chemical engineering Oxygen Evolution Doped Carbon |
| url | https://hdl.handle.net/10356/154914 |
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