Sustainable hydrogen fuel supply through electrochemical water splitting requires highly efficient, low-cost and robust electrocatalysts. Interface engineering is of key importance to improve the catalytic performance in a heterogeneous electrocatalytic system. Herein, a porous microcubic framework composed of a ZnO/ZnMoO4 heterostructure (ZnO@ZnMoO4) is prepared by a hybrid zeolitic imidazolate framework-derived oxidation method, and it shows much enhanced hydrogen evolution reaction (HER) activity in alkaline media. The overpotential (at 10 mA cm-2) for ZnO@ZnMoO4 is significantly reduced by 30% and 20% compared with those for virgin ZnO (v-ZnO) and polycrystalline zinc molybdenum oxide (PZMO), respectively. The enhanced electrocatalytic activity should be attributed to the ZnO/ZnMoO4 heterostructure, which can synergistically facilitate the charge transport. This work provides a more structured design strategy for electrocatalysts for future electrochemical energy conversion systems.
|Original language||English (US)|
|Journal||Dalton transactions (Cambridge, England : 2003)|
|State||Published - Aug 11 2021|
Bibliographical noteKAUST Repository Item: Exported on 2021-08-16
Acknowledgements: This work was supported by NSFC (21871050, 21773242).
ASJC Scopus subject areas
- Inorganic Chemistry