Nanoscale Double‐Heterojunctional Electrocatalyst for Hydrogen Evolution
Abstract The active sites and charge/mass transfer properties in electrocatalysts play vital roles in kinetics and thermodynamics of electrocatalysis, and impose direct impacts on electrocatalytic performance, which cannot be achieved by a simplex structure. As a prototype, the authors propose a dou...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Wiley
2022-06-01
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| Series: | Advanced Science |
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| Online Access: | https://doi.org/10.1002/advs.202201339 |
| _version_ | 1811241800668545024 |
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| author | Yangyang Feng Yongxin Guan Enbo Zhou Xiang Zhang Yaobing Wang |
| author_facet | Yangyang Feng Yongxin Guan Enbo Zhou Xiang Zhang Yaobing Wang |
| author_sort | Yangyang Feng |
| collection | DOAJ |
| description | Abstract The active sites and charge/mass transfer properties in electrocatalysts play vital roles in kinetics and thermodynamics of electrocatalysis, and impose direct impacts on electrocatalytic performance, which cannot be achieved by a simplex structure. As a prototype, the authors propose a double‐heterojunctional nanostructure of NiS2/Ni3C@C containing NiS2/Ni3C and Ni3C/C heterojunctions as a general model to optimize the above issues and boost electrocatalytic performance. During the thermal reorganization, the in situ reaction between NiS2 nanoparticles and carbon induces the formation of Ni3C between them and constructs tightly contacted two kinds of interfaces among the three components. The TEM and XPS reveal the intimately contacted three components and the as‐constructed interacted dual interfaces, further confirming the formation of a porous double‐heterojunctional nanostructure. Theoretical calculations uncover that the electron density redistribution occurs at Ni3C/C interface by spontaneous electron transfer from defected carbon to Ni3C and lower ΔGH* achieves at NiS2/Ni3C interface by the concentrated interfacial charge density, which favors the simultaneous realization of high catalytic activity and rapid charge/mass transfer. When applied for hydrogen evolution reaction (HER), the porous double‐heterojunctional NiS2/Ni3C@C exhibits excellent HER activity and durability among all pH values. Profoundly, this special double‐heterojunctional structure can provide a new model for high‐performance electrocatalysts and beyond. |
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| format | Article |
| id | doaj.art-ee75ffa72db14120b588902184608810 |
| institution | Directory Open Access Journal |
| issn | 2198-3844 |
| language | English |
| last_indexed | 2024-04-12T13:42:32Z |
| publishDate | 2022-06-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advanced Science |
| spelling | doaj.art-ee75ffa72db14120b5889021846088102022-12-22T03:30:49ZengWileyAdvanced Science2198-38442022-06-01918n/an/a10.1002/advs.202201339Nanoscale Double‐Heterojunctional Electrocatalyst for Hydrogen EvolutionYangyang Feng0Yongxin Guan1Enbo Zhou2Xiang Zhang3Yaobing Wang4CAS Key Laboratory of Design and Assembly of Functional Nanostructures and Fujian Provincial Key Laboratory of Nanomaterials State Key Laboratory of Structural Chemistry Fujian Institute of Research on the Structure of Matter Chinese Academy of Sciences Fuzhou Fujian 350002 P. R. ChinaChongqing Industry Polytechnic College Chongqing 401120 P. R. ChinaCAS Key Laboratory of Design and Assembly of Functional Nanostructures and Fujian Provincial Key Laboratory of Nanomaterials State Key Laboratory of Structural Chemistry Fujian Institute of Research on the Structure of Matter Chinese Academy of Sciences Fuzhou Fujian 350002 P. R. ChinaCAS Key Laboratory of Design and Assembly of Functional Nanostructures and Fujian Provincial Key Laboratory of Nanomaterials State Key Laboratory of Structural Chemistry Fujian Institute of Research on the Structure of Matter Chinese Academy of Sciences Fuzhou Fujian 350002 P. R. ChinaCAS Key Laboratory of Design and Assembly of Functional Nanostructures and Fujian Provincial Key Laboratory of Nanomaterials State Key Laboratory of Structural Chemistry Fujian Institute of Research on the Structure of Matter Chinese Academy of Sciences Fuzhou Fujian 350002 P. R. ChinaAbstract The active sites and charge/mass transfer properties in electrocatalysts play vital roles in kinetics and thermodynamics of electrocatalysis, and impose direct impacts on electrocatalytic performance, which cannot be achieved by a simplex structure. As a prototype, the authors propose a double‐heterojunctional nanostructure of NiS2/Ni3C@C containing NiS2/Ni3C and Ni3C/C heterojunctions as a general model to optimize the above issues and boost electrocatalytic performance. During the thermal reorganization, the in situ reaction between NiS2 nanoparticles and carbon induces the formation of Ni3C between them and constructs tightly contacted two kinds of interfaces among the three components. The TEM and XPS reveal the intimately contacted three components and the as‐constructed interacted dual interfaces, further confirming the formation of a porous double‐heterojunctional nanostructure. Theoretical calculations uncover that the electron density redistribution occurs at Ni3C/C interface by spontaneous electron transfer from defected carbon to Ni3C and lower ΔGH* achieves at NiS2/Ni3C interface by the concentrated interfacial charge density, which favors the simultaneous realization of high catalytic activity and rapid charge/mass transfer. When applied for hydrogen evolution reaction (HER), the porous double‐heterojunctional NiS2/Ni3C@C exhibits excellent HER activity and durability among all pH values. Profoundly, this special double‐heterojunctional structure can provide a new model for high‐performance electrocatalysts and beyond.https://doi.org/10.1002/advs.202201339active sitesdouble‐heterojunctionelectrocatalystselectron transferhydrogen evolution |
| spellingShingle | Yangyang Feng Yongxin Guan Enbo Zhou Xiang Zhang Yaobing Wang Nanoscale Double‐Heterojunctional Electrocatalyst for Hydrogen Evolution Advanced Science active sites double‐heterojunction electrocatalysts electron transfer hydrogen evolution |
| title | Nanoscale Double‐Heterojunctional Electrocatalyst for Hydrogen Evolution |
| title_full | Nanoscale Double‐Heterojunctional Electrocatalyst for Hydrogen Evolution |
| title_fullStr | Nanoscale Double‐Heterojunctional Electrocatalyst for Hydrogen Evolution |
| title_full_unstemmed | Nanoscale Double‐Heterojunctional Electrocatalyst for Hydrogen Evolution |
| title_short | Nanoscale Double‐Heterojunctional Electrocatalyst for Hydrogen Evolution |
| title_sort | nanoscale double heterojunctional electrocatalyst for hydrogen evolution |
| topic | active sites double‐heterojunction electrocatalysts electron transfer hydrogen evolution |
| url | https://doi.org/10.1002/advs.202201339 |
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