Concurrent H₂ generation and formate production assisted by CO₂ absorption in one electrolyzer
Electrolyzers coupling electrocatalytic hydrogen evolution with oxidation reactions of small organic molecules have the merits of reducing cell voltage and generating high-value products. Herein, an electrolyzer is designed and optimized that can simultaneously achieve efficient hydrogen generation...
| Main Authors: | , , , , , , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2022
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| Online Access: | https://hdl.handle.net/10356/154783 |
| _version_ | 1811683210862526464 |
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| author | Cheng, Hongfei Liu, Yumei Wu, Jiawen Zhang, Zheng Li, Xiaogang Wang, Xin Fan, Hong Jin |
| author2 | School of Physical and Mathematical Sciences |
| author_facet | School of Physical and Mathematical Sciences Cheng, Hongfei Liu, Yumei Wu, Jiawen Zhang, Zheng Li, Xiaogang Wang, Xin Fan, Hong Jin |
| author_sort | Cheng, Hongfei |
| collection | NTU |
| description | Electrolyzers coupling electrocatalytic hydrogen evolution with oxidation reactions of small organic molecules have the merits of reducing cell voltage and generating high-value products. Herein, an electrolyzer is designed and optimized that can simultaneously achieve efficient hydrogen generation at the cathode, CO2 absorption by the catholyte, and methanol upgrading to formate at the anode. For these purposes, transition metal phosphides are used as the low-cost catalysts. The unique electrolyzer exhibits a low working voltage of 1.1 V at 10 mA cm-2 . Under optimal conditions, the Faraday efficiencies of hydrogen evolution and formic acid conversion reactions, which are the reaction products at the cathode and anode, respectively, are nearly 100% at various current densities from 10 to 400 mA cm-2 . Meanwhile, the CO2 absorption rate is about twice that of the hydrogen generation rate, which is close to the theoretical value. An innovative and energy-efficient strategy is presented in this work to realize simultaneous hydrogen production and CO2 capture based on low-cost catalyst materials. |
| first_indexed | 2024-10-01T04:09:07Z |
| format | Journal Article |
| id | ntu-10356/154783 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T04:09:07Z |
| publishDate | 2022 |
| record_format | dspace |
| spelling | ntu-10356/1547832023-02-28T19:41:09Z Concurrent H₂ generation and formate production assisted by CO₂ absorption in one electrolyzer Cheng, Hongfei Liu, Yumei Wu, Jiawen Zhang, Zheng Li, Xiaogang Wang, Xin Fan, Hong Jin School of Physical and Mathematical Sciences School of Chemical and Biomedical Engineering Engineering::Materials::Energy materials Hydrogen Generation Low-Cost Electrocatalysts Electrolyzers coupling electrocatalytic hydrogen evolution with oxidation reactions of small organic molecules have the merits of reducing cell voltage and generating high-value products. Herein, an electrolyzer is designed and optimized that can simultaneously achieve efficient hydrogen generation at the cathode, CO2 absorption by the catholyte, and methanol upgrading to formate at the anode. For these purposes, transition metal phosphides are used as the low-cost catalysts. The unique electrolyzer exhibits a low working voltage of 1.1 V at 10 mA cm-2 . Under optimal conditions, the Faraday efficiencies of hydrogen evolution and formic acid conversion reactions, which are the reaction products at the cathode and anode, respectively, are nearly 100% at various current densities from 10 to 400 mA cm-2 . Meanwhile, the CO2 absorption rate is about twice that of the hydrogen generation rate, which is close to the theoretical value. An innovative and energy-efficient strategy is presented in this work to realize simultaneous hydrogen production and CO2 capture based on low-cost catalyst materials. Agency for Science, Technology and Research (A*STAR) Ministry of Education (MOE) Accepted version H.J.F. acknowledges the funding support from the Singapore MOE by Tier 1 (RG157/19, RG85/20) and Agency for Science, Technology, and Research (A*STAR), Singapore by AME Individual Research Grants (A1983c0026). 2022-01-10T03:54:33Z 2022-01-10T03:54:33Z 2021 Journal Article Cheng, H., Liu, Y., Wu, J., Zhang, Z., Li, X., Wang, X. & Fan, H. J. (2021). Concurrent H₂ generation and formate production assisted by CO₂ absorption in one electrolyzer. Small Methods, 5(11), 2100871-. https://dx.doi.org/10.1002/smtd.202100871 2366-9608 https://hdl.handle.net/10356/154783 10.1002/smtd.202100871 34927975 2-s2.0-85116456191 11 5 2100871 en RG157/19 RG85/20 A1983c0026 Small Methods This is the peer reviewed version of the following article: Cheng, H., Liu, Y., Wu, J., Zhang, Z., Li, X., Wang, X. & Fan, H. J. (2021). Concurrent H₂ generation and formate production assisted by CO₂ absorption in one electrolyzer. Small Methods, 5(11), 2100871-, which has been published in final form at https://doi.org/10.1002/smtd.202100871. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions. application/pdf |
| spellingShingle | Engineering::Materials::Energy materials Hydrogen Generation Low-Cost Electrocatalysts Cheng, Hongfei Liu, Yumei Wu, Jiawen Zhang, Zheng Li, Xiaogang Wang, Xin Fan, Hong Jin Concurrent H₂ generation and formate production assisted by CO₂ absorption in one electrolyzer |
| title | Concurrent H₂ generation and formate production assisted by CO₂ absorption in one electrolyzer |
| title_full | Concurrent H₂ generation and formate production assisted by CO₂ absorption in one electrolyzer |
| title_fullStr | Concurrent H₂ generation and formate production assisted by CO₂ absorption in one electrolyzer |
| title_full_unstemmed | Concurrent H₂ generation and formate production assisted by CO₂ absorption in one electrolyzer |
| title_short | Concurrent H₂ generation and formate production assisted by CO₂ absorption in one electrolyzer |
| title_sort | concurrent h₂ generation and formate production assisted by co₂ absorption in one electrolyzer |
| topic | Engineering::Materials::Energy materials Hydrogen Generation Low-Cost Electrocatalysts |
| url | https://hdl.handle.net/10356/154783 |
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