Journal article
Stacking Fault-Enriched MoNi4/MoO2 Enables High-Performance Hydrogen Evolution
Y Wang, H Arandiyan, SS Mofarah, X Shen, SA Bartlett, P Koshy, CC Sorrell, H Sun, C Pozo-Gonzalo, K Dastafkan, S Britto, SK Bhargava, C Zhao
Advanced Materials | WILEY-V C H VERLAG GMBH | Published : 2024
Abstract
Producing green hydrogen in a cost-competitive manner via water electrolysis will make the long-held dream of hydrogen economy a reality. Although platinum (Pt)-based catalysts show good performance toward hydrogen evolution reaction (HER), the high cost and scarce abundance challenge their economic viability and sustainability. Here, a non-Pt, high-performance electrocatalyst for HER achieved by engineering high fractions of stacking fault (SF) defects for MoNi4/MoO2 nanosheets (d-MoNi) through a combined chemical and thermal reduction strategy is shown. The d-MoNi catalyst offers ultralow overpotentials of 78 and 121 mV for HER at current densities of 500 and 1000 mA cm−2 in 1 M KOH, respe..
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Grants
Awarded by Australian Renewable Energy Agency
Funding Acknowledgements
The study is supported by the Australian Renewable Energy Agency (ARENA) and the Australian Research Council (IC200100023, DP220103294, and CE230100017). Y.W. acknowledges the International Hydrogen Research Fellowship Program financially supported by CSIRO, DCCEEW, the Australian Hydrogen Research Network (AHRN) and the Australian Research Council (DE230100327 and LP220200583). H. A. acknowledges the support from the DCCEEW International Clean Innovation Researcher Networks Grant (ICIRN000011). Distinguished Professor Suresh Bhargava expresses his gratitude toward his mentor and PhD supervisor the late Professor E. W. Abel, University of Exeter (UK), for giving him the power of knowledge and mentorship to produce the next generation of scientists. The authors acknowledge the Australian Synchrotron and Diamond Light Source in the UK. Special thanks are extended to Dr Magnus Garbrecht for his assistance in HRTEM analysis and access to the electron microscopy facilities of Sydney Microscopy and Microanalysis at the University of Sydney. The authors thank Drs Edwin Mayes, Matthew Field, and Billy Murdoch from the RMIT Microscopy and Microanalysis Facility (RMMF) for their assistance with the TEM, SEM, and XPS analyses.