A Highly Active Porous Mo<sub>2</sub>C-Mo<sub>2</sub>N Heterostructure on Carbon Nanowalls/Diamond for a High-Current Hydrogen Evolution Reaction
Developing non-precious metal-based electrocatalysts operating in high-current densities is highly demanded for the industry-level electrochemical hydrogen evolution reaction (HER). Here, we report the facile preparation of binder-free Mo<sub>2</sub>C-Mo<sub>2</sub>N heterost...
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MDPI AG
2024-01-01
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| Series: | Nanomaterials |
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| Online Access: | https://www.mdpi.com/2079-4991/14/3/243 |
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| author | Zhaofeng Zhai Chuyan Zhang Bin Chen Lusheng Liu Haozhe Song Bing Yang Ziwen Zheng Junyao Li Xin Jiang Nan Huang |
| author_facet | Zhaofeng Zhai Chuyan Zhang Bin Chen Lusheng Liu Haozhe Song Bing Yang Ziwen Zheng Junyao Li Xin Jiang Nan Huang |
| author_sort | Zhaofeng Zhai |
| collection | DOAJ |
| description | Developing non-precious metal-based electrocatalysts operating in high-current densities is highly demanded for the industry-level electrochemical hydrogen evolution reaction (HER). Here, we report the facile preparation of binder-free Mo<sub>2</sub>C-Mo<sub>2</sub>N heterostructures on carbon nanowalls/diamond (CNWs/D) via ultrasonic soaking followed by an annealing treatment. The experimental investigations and density functional theory calculations reveal the downshift of the d-band center caused by the heterojunction between Mo<sub>2</sub>C/Mo<sub>2</sub>N triggering highly active interfacial sites with a nearly zero ∆<i>G</i><sub>H*</sub> value. Furthermore, the 3D-networked CNWs/D, as the current collector, features high electrical conductivity and large surface area, greatly boosting the electron transfer rate of HER occurring on the interfacial sites of Mo<sub>2</sub>C-Mo<sub>2</sub>N. Consequently, the self-supporting Mo<sub>2</sub>C-Mo<sub>2</sub>N@CNWs/D exhibits significantly low overpotentials of 137.8 and 194.4 mV at high current densities of 500 and 1000 mA/cm<sup>2</sup>, respectively, in an alkaline solution, which far surpass the benchmark Pt/C (228.5 and 359.3 mV) and are superior to most transition-metal-based materials. This work presents a cost-effective and high-efficiency non-precious metal-based electrocatalyst candidate for the electrochemical hydrogen production industry. |
| first_indexed | 2024-03-08T03:52:03Z |
| format | Article |
| id | doaj.art-b254ee801d6f4ef188904b5c484151d6 |
| institution | Directory Open Access Journal |
| issn | 2079-4991 |
| language | English |
| last_indexed | 2024-03-08T03:52:03Z |
| publishDate | 2024-01-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Nanomaterials |
| spelling | doaj.art-b254ee801d6f4ef188904b5c484151d62024-02-09T15:19:18ZengMDPI AGNanomaterials2079-49912024-01-0114324310.3390/nano14030243A Highly Active Porous Mo<sub>2</sub>C-Mo<sub>2</sub>N Heterostructure on Carbon Nanowalls/Diamond for a High-Current Hydrogen Evolution ReactionZhaofeng Zhai0Chuyan Zhang1Bin Chen2Lusheng Liu3Haozhe Song4Bing Yang5Ziwen Zheng6Junyao Li7Xin Jiang8Nan Huang9Shenyang National Laboratory for Materials Science (SYNL), Institute of Metal Research (IMR), Chinese Academy of Sciences (CAS), No. 72 Wenhua Road, Shenyang 110016, ChinaShenyang National Laboratory for Materials Science (SYNL), Institute of Metal Research (IMR), Chinese Academy of Sciences (CAS), No. 72 Wenhua Road, Shenyang 110016, ChinaShenyang National Laboratory for Materials Science (SYNL), Institute of Metal Research (IMR), Chinese Academy of Sciences (CAS), No. 72 Wenhua Road, Shenyang 110016, ChinaShenyang National Laboratory for Materials Science (SYNL), Institute of Metal Research (IMR), Chinese Academy of Sciences (CAS), No. 72 Wenhua Road, Shenyang 110016, ChinaShenyang National Laboratory for Materials Science (SYNL), Institute of Metal Research (IMR), Chinese Academy of Sciences (CAS), No. 72 Wenhua Road, Shenyang 110016, ChinaShenyang National Laboratory for Materials Science (SYNL), Institute of Metal Research (IMR), Chinese Academy of Sciences (CAS), No. 72 Wenhua Road, Shenyang 110016, ChinaShenyang National Laboratory for Materials Science (SYNL), Institute of Metal Research (IMR), Chinese Academy of Sciences (CAS), No. 72 Wenhua Road, Shenyang 110016, ChinaShenyang National Laboratory for Materials Science (SYNL), Institute of Metal Research (IMR), Chinese Academy of Sciences (CAS), No. 72 Wenhua Road, Shenyang 110016, ChinaShenyang National Laboratory for Materials Science (SYNL), Institute of Metal Research (IMR), Chinese Academy of Sciences (CAS), No. 72 Wenhua Road, Shenyang 110016, ChinaShenyang National Laboratory for Materials Science (SYNL), Institute of Metal Research (IMR), Chinese Academy of Sciences (CAS), No. 72 Wenhua Road, Shenyang 110016, ChinaDeveloping non-precious metal-based electrocatalysts operating in high-current densities is highly demanded for the industry-level electrochemical hydrogen evolution reaction (HER). Here, we report the facile preparation of binder-free Mo<sub>2</sub>C-Mo<sub>2</sub>N heterostructures on carbon nanowalls/diamond (CNWs/D) via ultrasonic soaking followed by an annealing treatment. The experimental investigations and density functional theory calculations reveal the downshift of the d-band center caused by the heterojunction between Mo<sub>2</sub>C/Mo<sub>2</sub>N triggering highly active interfacial sites with a nearly zero ∆<i>G</i><sub>H*</sub> value. Furthermore, the 3D-networked CNWs/D, as the current collector, features high electrical conductivity and large surface area, greatly boosting the electron transfer rate of HER occurring on the interfacial sites of Mo<sub>2</sub>C-Mo<sub>2</sub>N. Consequently, the self-supporting Mo<sub>2</sub>C-Mo<sub>2</sub>N@CNWs/D exhibits significantly low overpotentials of 137.8 and 194.4 mV at high current densities of 500 and 1000 mA/cm<sup>2</sup>, respectively, in an alkaline solution, which far surpass the benchmark Pt/C (228.5 and 359.3 mV) and are superior to most transition-metal-based materials. This work presents a cost-effective and high-efficiency non-precious metal-based electrocatalyst candidate for the electrochemical hydrogen production industry.https://www.mdpi.com/2079-4991/14/3/243hydrogen evolution reactionhigh current densitycarbon nanowallsdiamondMo<sub>2</sub>CMo<sub>2</sub>N |
| spellingShingle | Zhaofeng Zhai Chuyan Zhang Bin Chen Lusheng Liu Haozhe Song Bing Yang Ziwen Zheng Junyao Li Xin Jiang Nan Huang A Highly Active Porous Mo<sub>2</sub>C-Mo<sub>2</sub>N Heterostructure on Carbon Nanowalls/Diamond for a High-Current Hydrogen Evolution Reaction Nanomaterials hydrogen evolution reaction high current density carbon nanowalls diamond Mo<sub>2</sub>C Mo<sub>2</sub>N |
| title | A Highly Active Porous Mo<sub>2</sub>C-Mo<sub>2</sub>N Heterostructure on Carbon Nanowalls/Diamond for a High-Current Hydrogen Evolution Reaction |
| title_full | A Highly Active Porous Mo<sub>2</sub>C-Mo<sub>2</sub>N Heterostructure on Carbon Nanowalls/Diamond for a High-Current Hydrogen Evolution Reaction |
| title_fullStr | A Highly Active Porous Mo<sub>2</sub>C-Mo<sub>2</sub>N Heterostructure on Carbon Nanowalls/Diamond for a High-Current Hydrogen Evolution Reaction |
| title_full_unstemmed | A Highly Active Porous Mo<sub>2</sub>C-Mo<sub>2</sub>N Heterostructure on Carbon Nanowalls/Diamond for a High-Current Hydrogen Evolution Reaction |
| title_short | A Highly Active Porous Mo<sub>2</sub>C-Mo<sub>2</sub>N Heterostructure on Carbon Nanowalls/Diamond for a High-Current Hydrogen Evolution Reaction |
| title_sort | highly active porous mo sub 2 sub c mo sub 2 sub n heterostructure on carbon nanowalls diamond for a high current hydrogen evolution reaction |
| topic | hydrogen evolution reaction high current density carbon nanowalls diamond Mo<sub>2</sub>C Mo<sub>2</sub>N |
| url | https://www.mdpi.com/2079-4991/14/3/243 |
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