Promoting hydrogen-evolution activity and stability of perovskite oxides via effectively lattice doping of molybdenum
Electrocatalysts are the most compelling objectives in realizing highly efficient renewable energy conversion and storage applications. Rational doping is an effective strategy for the development of cost-effective perovskite oxides with high electrochemical performance. In this study, we report fac...
| Main Authors: | , , , , |
|---|---|
| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2021
|
| Subjects: | |
| Online Access: | https://hdl.handle.net/10356/151166 |
| _version_ | 1824456409402572800 |
|---|---|
| author | Zhang, Zhenbao Chen, Yubo Dai, Ziyang Tan, Shaozao Chen, Dengjie |
| author2 | School of Materials Science and Engineering |
| author_facet | School of Materials Science and Engineering Zhang, Zhenbao Chen, Yubo Dai, Ziyang Tan, Shaozao Chen, Dengjie |
| author_sort | Zhang, Zhenbao |
| collection | NTU |
| description | Electrocatalysts are the most compelling objectives in realizing highly efficient renewable energy conversion and storage applications. Rational doping is an effective strategy for the development of cost-effective perovskite oxides with high electrochemical performance. In this study, we report facilely prepared molybdenum (Mo)-doped SrCo0.70Fe0.30O3-δ perovskites such as SrCo0.7Fe0.25Mo0.05O3-δ (SCFM0.05) and SrCo0.7Fe0.20Mo0.10O3-δ (SCFM0.10) for boosting the hydrogen evolution reaction (HER) activity and stability. Among them, SCFM0.05 delivers a promising overpotential of ∼323 mV at the current density of 10 mA cmdisk^-2 and keeps almost stable for 5 h and after accelerated 1000 cycles. The promoted HER activity of SCFM0.05 regarding the decreased overpotential, increased catalytic current density, and improved charge transfer kinetics, might originate from the combined effects of distortion of octahedral coordination, low oxygen vacancy/high oxidation state of Co, abundant lattice oxygen and highly oxidative oxygen species, long B–O length, and strong OH− adsorption compared to the un-doped counterpart. We ascribe the enhanced operational stability to the formation of a low concentration of oxygen vacancy that stabilizes the crystal structure of Mo-doped SrCo0.7Fe0.3O3-δ and prevents the surface from Sr leaching/surface amorphization. These findings suggest that tuning perovskite oxide using a redox-inactive dopant featured with high valence state may provide further avenues to HER optimization. |
| first_indexed | 2025-02-19T03:53:39Z |
| format | Journal Article |
| id | ntu-10356/151166 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2025-02-19T03:53:39Z |
| publishDate | 2021 |
| record_format | dspace |
| spelling | ntu-10356/1511662021-06-09T06:19:38Z Promoting hydrogen-evolution activity and stability of perovskite oxides via effectively lattice doping of molybdenum Zhang, Zhenbao Chen, Yubo Dai, Ziyang Tan, Shaozao Chen, Dengjie School of Materials Science and Engineering Engineering::Materials Molybdenum (Mo) Dopant Lattice Doping Electrocatalysts are the most compelling objectives in realizing highly efficient renewable energy conversion and storage applications. Rational doping is an effective strategy for the development of cost-effective perovskite oxides with high electrochemical performance. In this study, we report facilely prepared molybdenum (Mo)-doped SrCo0.70Fe0.30O3-δ perovskites such as SrCo0.7Fe0.25Mo0.05O3-δ (SCFM0.05) and SrCo0.7Fe0.20Mo0.10O3-δ (SCFM0.10) for boosting the hydrogen evolution reaction (HER) activity and stability. Among them, SCFM0.05 delivers a promising overpotential of ∼323 mV at the current density of 10 mA cmdisk^-2 and keeps almost stable for 5 h and after accelerated 1000 cycles. The promoted HER activity of SCFM0.05 regarding the decreased overpotential, increased catalytic current density, and improved charge transfer kinetics, might originate from the combined effects of distortion of octahedral coordination, low oxygen vacancy/high oxidation state of Co, abundant lattice oxygen and highly oxidative oxygen species, long B–O length, and strong OH− adsorption compared to the un-doped counterpart. We ascribe the enhanced operational stability to the formation of a low concentration of oxygen vacancy that stabilizes the crystal structure of Mo-doped SrCo0.7Fe0.3O3-δ and prevents the surface from Sr leaching/surface amorphization. These findings suggest that tuning perovskite oxide using a redox-inactive dopant featured with high valence state may provide further avenues to HER optimization. This research is supported by the National Natural Science Foundation of China (No. 51702125 & No. 21808080), Pearl River S&T Nova Program of Guangzhou (No. 201806010054), Fundamental Research Funds for the Central Universities (No. 21616301), and the China Postdoctoral Science Foundation (No. 2017M620401). 2021-06-09T06:19:38Z 2021-06-09T06:19:38Z 2019 Journal Article Zhang, Z., Chen, Y., Dai, Z., Tan, S. & Chen, D. (2019). Promoting hydrogen-evolution activity and stability of perovskite oxides via effectively lattice doping of molybdenum. Electrochimica Acta, 312, 128-136. https://dx.doi.org/10.1016/j.electacta.2019.04.163 0013-4686 https://hdl.handle.net/10356/151166 10.1016/j.electacta.2019.04.163 2-s2.0-85065499510 312 128 136 en Electrochimica Acta © 2019 Elsevier Ltd. All rights reserved. |
| spellingShingle | Engineering::Materials Molybdenum (Mo) Dopant Lattice Doping Zhang, Zhenbao Chen, Yubo Dai, Ziyang Tan, Shaozao Chen, Dengjie Promoting hydrogen-evolution activity and stability of perovskite oxides via effectively lattice doping of molybdenum |
| title | Promoting hydrogen-evolution activity and stability of perovskite oxides via effectively lattice doping of molybdenum |
| title_full | Promoting hydrogen-evolution activity and stability of perovskite oxides via effectively lattice doping of molybdenum |
| title_fullStr | Promoting hydrogen-evolution activity and stability of perovskite oxides via effectively lattice doping of molybdenum |
| title_full_unstemmed | Promoting hydrogen-evolution activity and stability of perovskite oxides via effectively lattice doping of molybdenum |
| title_short | Promoting hydrogen-evolution activity and stability of perovskite oxides via effectively lattice doping of molybdenum |
| title_sort | promoting hydrogen evolution activity and stability of perovskite oxides via effectively lattice doping of molybdenum |
| topic | Engineering::Materials Molybdenum (Mo) Dopant Lattice Doping |
| url | https://hdl.handle.net/10356/151166 |
| work_keys_str_mv | AT zhangzhenbao promotinghydrogenevolutionactivityandstabilityofperovskiteoxidesviaeffectivelylatticedopingofmolybdenum AT chenyubo promotinghydrogenevolutionactivityandstabilityofperovskiteoxidesviaeffectivelylatticedopingofmolybdenum AT daiziyang promotinghydrogenevolutionactivityandstabilityofperovskiteoxidesviaeffectivelylatticedopingofmolybdenum AT tanshaozao promotinghydrogenevolutionactivityandstabilityofperovskiteoxidesviaeffectivelylatticedopingofmolybdenum AT chendengjie promotinghydrogenevolutionactivityandstabilityofperovskiteoxidesviaeffectivelylatticedopingofmolybdenum |