Journal article
Modulating Pt-O-Pt atomic clusters with isolated cobalt atoms for enhanced hydrogen evolution catalysis
Y Zhao, PV Kumar, X Tan, X Lu, X Zhu, J Jiang, J Pan, S Xi, HY Yang, Z Ma, T Wan, D Chu, W Jiang, SC Smith, R Amal, Z Han, X Lu
Nature Communications | NATURE PORTFOLIO | Published : 2022
Abstract
Platinum is the most efficient catalyst for hydrogen evolution reaction in acidic conditions, but its widespread use has been impeded by scarcity and high cost. Herein, Pt atomic clusters (Pt ACs) containing Pt-O-Pt units were prepared using Co/N co-doped carbon (CoNC) as support. Pt ACs are anchored to single Co atoms on CoNC by forming strong interactions. Pt-ACs/CoNC exhibits only 24 mV overpotential at 10 mA cm−2 and a high mass activity of 28.6 A mg−1 at 50 mV, which is more than 6 times higher than commercial Pt/C with any Pt loadings. Spectroscopic measurements and computational modeling reveal the enhanced hydrogen generation activity attributes to the charge redistribution between P..
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Grants
Awarded by Australian Government
Funding Acknowledgements
We thank UNSW Mark Wainwright Analytical Center for providing access to the SEM, TEM, XPS and other facilities. The authors acknowledge use of JEOL JEM-ARM200F STEM within the University of Wollongong (UoW) Electron Microscopy Centre and XAS measurements at the Synchrotron Radiation Research Center, Singapore. Dr. Jinqiang Zhang and Dr. Pengfei Ou from the University of Toronto (UofT) are acknowledged for their valuable discussions. This work was supported by the Australian Renewable Energy Agency (ARENA 2018/RND014) and Australian Research Council (ARC ITRP Scheme-IC200100023). X. L. and P.V.K. thank the UNSW Scientia Scheme for financial supports. P.V.K acknowledges the ARC DECRA Fellowship (DE210101259). This research was also undertaken with the assistance of resources provided by the National Computing Infrastructure (NCI) facility at the Australian National University; allocated through both the National Computational Merit Allocation Scheme supported by the Australian Government and the Australian Research Council grant LE190100021 (sustaining and strengthening merit-based access at NCI, 2019-2021).