Porphyrins‐Assisted Cocatalyst Engineering with CoOV Bond in BiVO4 Photoanode for Efficient Oxygen Evolution Reaction
Abstract The application of photoelectrochemical (PEC) water splitting is limited by the sluggish surface oxygen evolution reaction (OER) kinetics. OER kinetics can be effectively improved through cocatalyst engineering. However, the tardy transfer process and serious recombination of carriers are t...
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| Format: | Article |
| Language: | English |
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Wiley
2023-03-01
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| Series: | Advanced Science |
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| Online Access: | https://doi.org/10.1002/advs.202206729 |
| _version_ | 1797870207388090368 |
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| author | Linxing Meng Zunyan Lv Weiwei Xu Wei Tian Liang Li |
| author_facet | Linxing Meng Zunyan Lv Weiwei Xu Wei Tian Liang Li |
| author_sort | Linxing Meng |
| collection | DOAJ |
| description | Abstract The application of photoelectrochemical (PEC) water splitting is limited by the sluggish surface oxygen evolution reaction (OER) kinetics. OER kinetics can be effectively improved through cocatalyst engineering. However, the tardy transfer process and serious recombination of carriers are the key factors restricting the cocatalyst development. Taking BiVO4 as an example, a Co‐modified heme film rich in large conjugated ring structures is introduced onto the photoanode surface using a solvothermal method. This film functions as an efficient cocatalyst. It considerably reduces the surface overpotential, promotes the transfer of photogenerated holes, and boosts the kinetics of OER by specifically affecting the formation of OOH*. Simultaneously, the formed CoOV bonds induce strong interaction at the photoanode/cocatalyst interfaces, reducing the recombination of photogenerated carriers. Consequently, the onset potential of the optimized photoanode decreases from 0.45 to 0.07 V and the photocurrent density at 1.23 V versus reversible hydrogen electrode boosts to 5.3 mA cm−2. This work demonstrates a facile strategy for designing cocatalysts to obtain rapid hole transfer capability and reduced carrier recombination for improved PEC performance. |
| first_indexed | 2024-04-10T00:24:46Z |
| format | Article |
| id | doaj.art-e0db81f047cc4de39f1f54586f774ace |
| institution | Directory Open Access Journal |
| issn | 2198-3844 |
| language | English |
| last_indexed | 2024-04-10T00:24:46Z |
| publishDate | 2023-03-01 |
| publisher | Wiley |
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| series | Advanced Science |
| spelling | doaj.art-e0db81f047cc4de39f1f54586f774ace2023-03-15T13:19:15ZengWileyAdvanced Science2198-38442023-03-01108n/an/a10.1002/advs.202206729Porphyrins‐Assisted Cocatalyst Engineering with CoOV Bond in BiVO4 Photoanode for Efficient Oxygen Evolution ReactionLinxing Meng0Zunyan Lv1Weiwei Xu2Wei Tian3Liang Li4School of Physical Science and Technology Jiangsu Key Laboratory of Thin Films Center for Energy Conversion Materials and Physics (CECMP) Soochow University Suzhou 215006 P. R. ChinaSchool of Physical Science and Technology Jiangsu Key Laboratory of Thin Films Center for Energy Conversion Materials and Physics (CECMP) Soochow University Suzhou 215006 P. R. ChinaSchool of Physical Science and Technology Jiangsu Key Laboratory of Thin Films Center for Energy Conversion Materials and Physics (CECMP) Soochow University Suzhou 215006 P. R. ChinaSchool of Physical Science and Technology Jiangsu Key Laboratory of Thin Films Center for Energy Conversion Materials and Physics (CECMP) Soochow University Suzhou 215006 P. R. ChinaSchool of Physical Science and Technology Jiangsu Key Laboratory of Thin Films Center for Energy Conversion Materials and Physics (CECMP) Soochow University Suzhou 215006 P. R. ChinaAbstract The application of photoelectrochemical (PEC) water splitting is limited by the sluggish surface oxygen evolution reaction (OER) kinetics. OER kinetics can be effectively improved through cocatalyst engineering. However, the tardy transfer process and serious recombination of carriers are the key factors restricting the cocatalyst development. Taking BiVO4 as an example, a Co‐modified heme film rich in large conjugated ring structures is introduced onto the photoanode surface using a solvothermal method. This film functions as an efficient cocatalyst. It considerably reduces the surface overpotential, promotes the transfer of photogenerated holes, and boosts the kinetics of OER by specifically affecting the formation of OOH*. Simultaneously, the formed CoOV bonds induce strong interaction at the photoanode/cocatalyst interfaces, reducing the recombination of photogenerated carriers. Consequently, the onset potential of the optimized photoanode decreases from 0.45 to 0.07 V and the photocurrent density at 1.23 V versus reversible hydrogen electrode boosts to 5.3 mA cm−2. This work demonstrates a facile strategy for designing cocatalysts to obtain rapid hole transfer capability and reduced carrier recombination for improved PEC performance.https://doi.org/10.1002/advs.202206729BiVO4cocatalystsphotoanodewater splitting |
| spellingShingle | Linxing Meng Zunyan Lv Weiwei Xu Wei Tian Liang Li Porphyrins‐Assisted Cocatalyst Engineering with CoOV Bond in BiVO4 Photoanode for Efficient Oxygen Evolution Reaction Advanced Science BiVO4 cocatalysts photoanode water splitting |
| title | Porphyrins‐Assisted Cocatalyst Engineering with CoOV Bond in BiVO4 Photoanode for Efficient Oxygen Evolution Reaction |
| title_full | Porphyrins‐Assisted Cocatalyst Engineering with CoOV Bond in BiVO4 Photoanode for Efficient Oxygen Evolution Reaction |
| title_fullStr | Porphyrins‐Assisted Cocatalyst Engineering with CoOV Bond in BiVO4 Photoanode for Efficient Oxygen Evolution Reaction |
| title_full_unstemmed | Porphyrins‐Assisted Cocatalyst Engineering with CoOV Bond in BiVO4 Photoanode for Efficient Oxygen Evolution Reaction |
| title_short | Porphyrins‐Assisted Cocatalyst Engineering with CoOV Bond in BiVO4 Photoanode for Efficient Oxygen Evolution Reaction |
| title_sort | porphyrins assisted cocatalyst engineering with coov bond in bivo4 photoanode for efficient oxygen evolution reaction |
| topic | BiVO4 cocatalysts photoanode water splitting |
| url | https://doi.org/10.1002/advs.202206729 |
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