Activating a Two-Dimensional PtSe2 Basal Plane for the Hydrogen Evolution Reaction through the Simultaneous Generation of Atomic Vacancies and Pt Clusters
| Autor: | Yueyang Wu, Xiaoqing Pan, Xingxu Yan, Liying Jiao, Shengxue Zhou, Pengfei Lu, Dan Liang, Dake Hu, Xiaofan Ping |
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| Rok vydání: | 2021 |
| Předmět: |
Tafel equation
Materials science Mechanical Engineering Exchange current density Bioengineering 02 engineering and technology General Chemistry Overpotential 021001 nanoscience & nanotechnology Condensed Matter Physics Electrocatalyst Electrochemistry Catalysis Transition metal Vacancy defect Physical chemistry General Materials Science 0210 nano-technology |
| Zdroj: | Nano Letters. 21:3857-3863 |
| ISSN: | 1530-6992 1530-6984 |
| Popis: | Two-dimensional (2D) PtSe2 has emerged as a promising ultrathin electrocatalyst due to its excellent catalytic activity and conductivity. However, the PtSe2 basal plane is inert for the hydrogen evolution reaction (HER), which greatly limits its electrocatalytic performance. Here, in light of theoretical calculations, we designed a facile approach for activating the 2D PtSe2 basal plane for the HER by simultaneously introducing atomic vacancies of Se, Pt, and Pt clusters through a mild Ar plasma treatment. We tracked changes in the structures and catalytic performance of PtSe2 by combining microscopic imaging, spectroscopic mapping, and electrochemical measurements in microcells. The highest performance of the activated PtSe2 basal plane that we obtained was superior to those of other 2D transition metal dichalcogenide-based electrocatalysts measured in microcells in terms of the overpotential, the Tafel slope, and the exchange current density. This study demonstrates the great potential of activated 2D PtSe2 as an ultrathin catalyst for the HER and provides new insights on the rational design of 2D electrocatalysts. |
| Databáze: | OpenAIRE |
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