Dual‐laser pulse‐patterned α‐Co(OH)2/rGO heterointerface for accelerated water oxidation and surface phase‐transition via in‐situ Raman spectroscopy
Abstract The dynamic surface reconstruction of electrodes is a legible sign to understand the deep phase‐transition mechanistic and electrocatalytic origin during the oxygen evolution reaction (OER). Herein, we report a dual‐laser pulse‐patterned heterointerface of α‐Co(OH)2 and reduced graphene oxi...
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Wiley
2023-12-01
|
| Series: | EcoMat |
| Subjects: | |
| Online Access: | https://doi.org/10.1002/eom2.12417 |
| _version_ | 1797397506520252416 |
|---|---|
| author | Yeryeong Lee Jayaraman Theerthagiri Ahreum Min Cheol Joo Moon Myong Yong Choi |
| author_facet | Yeryeong Lee Jayaraman Theerthagiri Ahreum Min Cheol Joo Moon Myong Yong Choi |
| author_sort | Yeryeong Lee |
| collection | DOAJ |
| description | Abstract The dynamic surface reconstruction of electrodes is a legible sign to understand the deep phase‐transition mechanistic and electrocatalytic origin during the oxygen evolution reaction (OER). Herein, we report a dual‐laser pulse‐patterned heterointerface of α‐Co(OH)2 and reduced graphene oxide (rGO) nanosheets via pulsed laser irradiation in liquid (PLIL) to accelerate OER kinetics. α‐Co(OH)2 was formed from the OH− ions generated during the PLIL of GO at neutral pH. Co2+ modulation in tetrahedral coordination sites benefits as an electrophilic surface for water oxidation. Few d‐vacancies in Co2+ increase its affinity toward oxygen, lowering the energy barrier and generating many CoOOH and CoO2 active sites. rGO with an ordered π‐conjugated system aids the surface adsorption of OOH*, O*, and OH* during OER. α‐Co(OH)2 surface phase‐transition and OER mechanistic steps occurred via phase‐reconstruction to CoOOH and CoO2 reactive intermediates, uncovered using in situ electrochemical–Raman spectroscopy. Our findings in the dual‐laser pulse strategy and the surface reconstruction correlation in active OER catalysts pave the path for paramount in multiple energy technologies. |
| first_indexed | 2024-03-09T01:12:04Z |
| format | Article |
| id | doaj.art-cb7c4f11b0214d2ebfd39fe9179b0aec |
| institution | Directory Open Access Journal |
| issn | 2567-3173 |
| language | English |
| last_indexed | 2024-03-09T01:12:04Z |
| publishDate | 2023-12-01 |
| publisher | Wiley |
| record_format | Article |
| series | EcoMat |
| spelling | doaj.art-cb7c4f11b0214d2ebfd39fe9179b0aec2023-12-11T04:43:33ZengWileyEcoMat2567-31732023-12-01512n/an/a10.1002/eom2.12417Dual‐laser pulse‐patterned α‐Co(OH)2/rGO heterointerface for accelerated water oxidation and surface phase‐transition via in‐situ Raman spectroscopyYeryeong Lee0Jayaraman Theerthagiri1Ahreum Min2Cheol Joo Moon3Myong Yong Choi4Department of Chemistry (BK21 FOUR), Research Institute of Natural Sciences Gyeongsang National University Jinju Republic of KoreaDepartment of Chemistry (BK21 FOUR), Research Institute of Natural Sciences Gyeongsang National University Jinju Republic of KoreaCore‐Facility Center for Photochemistry & Nanomaterials Gyeongsang National University Jinju Republic of KoreaCore‐Facility Center for Photochemistry & Nanomaterials Gyeongsang National University Jinju Republic of KoreaDepartment of Chemistry (BK21 FOUR), Research Institute of Natural Sciences Gyeongsang National University Jinju Republic of KoreaAbstract The dynamic surface reconstruction of electrodes is a legible sign to understand the deep phase‐transition mechanistic and electrocatalytic origin during the oxygen evolution reaction (OER). Herein, we report a dual‐laser pulse‐patterned heterointerface of α‐Co(OH)2 and reduced graphene oxide (rGO) nanosheets via pulsed laser irradiation in liquid (PLIL) to accelerate OER kinetics. α‐Co(OH)2 was formed from the OH− ions generated during the PLIL of GO at neutral pH. Co2+ modulation in tetrahedral coordination sites benefits as an electrophilic surface for water oxidation. Few d‐vacancies in Co2+ increase its affinity toward oxygen, lowering the energy barrier and generating many CoOOH and CoO2 active sites. rGO with an ordered π‐conjugated system aids the surface adsorption of OOH*, O*, and OH* during OER. α‐Co(OH)2 surface phase‐transition and OER mechanistic steps occurred via phase‐reconstruction to CoOOH and CoO2 reactive intermediates, uncovered using in situ electrochemical–Raman spectroscopy. Our findings in the dual‐laser pulse strategy and the surface reconstruction correlation in active OER catalysts pave the path for paramount in multiple energy technologies.https://doi.org/10.1002/eom2.12417dual‐laser pulsesin situ electrochemical–Raman probesoxygen evolution reactionpulsed laser irradiation in liquidsα‐Co(OH)2/rGO |
| spellingShingle | Yeryeong Lee Jayaraman Theerthagiri Ahreum Min Cheol Joo Moon Myong Yong Choi Dual‐laser pulse‐patterned α‐Co(OH)2/rGO heterointerface for accelerated water oxidation and surface phase‐transition via in‐situ Raman spectroscopy EcoMat dual‐laser pulses in situ electrochemical–Raman probes oxygen evolution reaction pulsed laser irradiation in liquids α‐Co(OH)2/rGO |
| title | Dual‐laser pulse‐patterned α‐Co(OH)2/rGO heterointerface for accelerated water oxidation and surface phase‐transition via in‐situ Raman spectroscopy |
| title_full | Dual‐laser pulse‐patterned α‐Co(OH)2/rGO heterointerface for accelerated water oxidation and surface phase‐transition via in‐situ Raman spectroscopy |
| title_fullStr | Dual‐laser pulse‐patterned α‐Co(OH)2/rGO heterointerface for accelerated water oxidation and surface phase‐transition via in‐situ Raman spectroscopy |
| title_full_unstemmed | Dual‐laser pulse‐patterned α‐Co(OH)2/rGO heterointerface for accelerated water oxidation and surface phase‐transition via in‐situ Raman spectroscopy |
| title_short | Dual‐laser pulse‐patterned α‐Co(OH)2/rGO heterointerface for accelerated water oxidation and surface phase‐transition via in‐situ Raman spectroscopy |
| title_sort | dual laser pulse patterned α co oh 2 rgo heterointerface for accelerated water oxidation and surface phase transition via in situ raman spectroscopy |
| topic | dual‐laser pulses in situ electrochemical–Raman probes oxygen evolution reaction pulsed laser irradiation in liquids α‐Co(OH)2/rGO |
| url | https://doi.org/10.1002/eom2.12417 |
| work_keys_str_mv | AT yeryeonglee duallaserpulsepatternedacooh2rgoheterointerfaceforacceleratedwateroxidationandsurfacephasetransitionviainsituramanspectroscopy AT jayaramantheerthagiri duallaserpulsepatternedacooh2rgoheterointerfaceforacceleratedwateroxidationandsurfacephasetransitionviainsituramanspectroscopy AT ahreummin duallaserpulsepatternedacooh2rgoheterointerfaceforacceleratedwateroxidationandsurfacephasetransitionviainsituramanspectroscopy AT cheoljoomoon duallaserpulsepatternedacooh2rgoheterointerfaceforacceleratedwateroxidationandsurfacephasetransitionviainsituramanspectroscopy AT myongyongchoi duallaserpulsepatternedacooh2rgoheterointerfaceforacceleratedwateroxidationandsurfacephasetransitionviainsituramanspectroscopy |