Boosting hydrogen evolution activity in alkaline media with dispersed ruthenium clusters in NiCo-layered double hydroxide
Herein, we report a hybrid electrocatalyst consisting of Ru clusters trapped in NiCo-layered double hydroxide (NiCo-LDH) as the basis for an efficient hydrogen evolution reaction (HER) in alkaline media. Benefiting from the fast water dissociation kinetics on NiCo-LDH and favorable H recombination o...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2019-04-01
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| Series: | Electrochemistry Communications |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S1388248119300141 |
| _version_ | 1811213901441794048 |
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| author | Dan Li Bowei Zhang Yang Li Rongsheng Chen Shan Hu Hongwei Ni |
| author_facet | Dan Li Bowei Zhang Yang Li Rongsheng Chen Shan Hu Hongwei Ni |
| author_sort | Dan Li |
| collection | DOAJ |
| description | Herein, we report a hybrid electrocatalyst consisting of Ru clusters trapped in NiCo-layered double hydroxide (NiCo-LDH) as the basis for an efficient hydrogen evolution reaction (HER) in alkaline media. Benefiting from the fast water dissociation kinetics on NiCo-LDH and favorable H recombination on Ru, the resultant Ru-NiCo-LDH shows an extremely low HER overpotential of 28 mV at a current density of 10 mA cm−2 with a small Tafel slope of 42 mV dec−1. This superior catalytic activity can be ascribed to its high charge transfer ability and to the synergistic effect of the highly dispersed Ru and the NiCo-LDH. Moreover, we also found that the oxidized Ru incorporated in NiCo-LDH was entirely reduced to Ru0 under hydrogen-evolution conditions, which suggests that Ru0 is the true catalytically active phase responsible for the outstanding HER performance. Keywords: Ruthenium, NiCo-layered double hydroxide, Hydrogen evolution reaction, Water dissociation |
| first_indexed | 2024-04-12T05:54:10Z |
| format | Article |
| id | doaj.art-95f5642c193f4a488e530c18049bb22f |
| institution | Directory Open Access Journal |
| issn | 1388-2481 |
| language | English |
| last_indexed | 2024-04-12T05:54:10Z |
| publishDate | 2019-04-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Electrochemistry Communications |
| spelling | doaj.art-95f5642c193f4a488e530c18049bb22f2022-12-22T03:45:12ZengElsevierElectrochemistry Communications1388-24812019-04-011012327Boosting hydrogen evolution activity in alkaline media with dispersed ruthenium clusters in NiCo-layered double hydroxideDan Li0Bowei Zhang1Yang Li2Rongsheng Chen3Shan Hu4Hongwei Ni5The State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology, Wuhan 430081, China; Department of Mechanical Engineering, Iowa State University, Ames, IA 50011, USADepartment of Mechanical Engineering, Iowa State University, Ames, IA 50011, USAThe State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology, Wuhan 430081, ChinaThe State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology, Wuhan 430081, ChinaDepartment of Mechanical Engineering, Iowa State University, Ames, IA 50011, USA; Corresponding authors.The State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology, Wuhan 430081, China; Corresponding authors.Herein, we report a hybrid electrocatalyst consisting of Ru clusters trapped in NiCo-layered double hydroxide (NiCo-LDH) as the basis for an efficient hydrogen evolution reaction (HER) in alkaline media. Benefiting from the fast water dissociation kinetics on NiCo-LDH and favorable H recombination on Ru, the resultant Ru-NiCo-LDH shows an extremely low HER overpotential of 28 mV at a current density of 10 mA cm−2 with a small Tafel slope of 42 mV dec−1. This superior catalytic activity can be ascribed to its high charge transfer ability and to the synergistic effect of the highly dispersed Ru and the NiCo-LDH. Moreover, we also found that the oxidized Ru incorporated in NiCo-LDH was entirely reduced to Ru0 under hydrogen-evolution conditions, which suggests that Ru0 is the true catalytically active phase responsible for the outstanding HER performance. Keywords: Ruthenium, NiCo-layered double hydroxide, Hydrogen evolution reaction, Water dissociationhttp://www.sciencedirect.com/science/article/pii/S1388248119300141 |
| spellingShingle | Dan Li Bowei Zhang Yang Li Rongsheng Chen Shan Hu Hongwei Ni Boosting hydrogen evolution activity in alkaline media with dispersed ruthenium clusters in NiCo-layered double hydroxide Electrochemistry Communications |
| title | Boosting hydrogen evolution activity in alkaline media with dispersed ruthenium clusters in NiCo-layered double hydroxide |
| title_full | Boosting hydrogen evolution activity in alkaline media with dispersed ruthenium clusters in NiCo-layered double hydroxide |
| title_fullStr | Boosting hydrogen evolution activity in alkaline media with dispersed ruthenium clusters in NiCo-layered double hydroxide |
| title_full_unstemmed | Boosting hydrogen evolution activity in alkaline media with dispersed ruthenium clusters in NiCo-layered double hydroxide |
| title_short | Boosting hydrogen evolution activity in alkaline media with dispersed ruthenium clusters in NiCo-layered double hydroxide |
| title_sort | boosting hydrogen evolution activity in alkaline media with dispersed ruthenium clusters in nico layered double hydroxide |
| url | http://www.sciencedirect.com/science/article/pii/S1388248119300141 |
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