Journal
ADVANCED FUNCTIONAL MATERIALS
Volume 32, Issue 30, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adfm.202202141
Keywords
diffusion enhancement; electrochemical water oxidation; MoS; (2); single-atom catalysts; Submicro reactor
Categories
Funding
- National Natural Science Foundation of China [NSFC: 52002359, 21902157, U1704256]
- Dalian National Laboratory for Clean Energy (DNL), CAS
- DNL Cooperation Fund, CAS [DNL180402]
- Key Program of Science and Technology Department of Henan Province [222102240020]
- Zhengzhou University of Light Industry [2018BSJJ027]
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Simultaneous modulation of mesoscale diffusion and Mo-Fe-C site formation in sub-micro reactors can boost OER performance, showing great potential for various electrocatalytic reactions.
Simultaneously engineering the mesoscale mass transfer and surface reactions on the electrode can promote the kinetics of oxygen evolution reaction (OER). Herein, it is reported that the simultaneous modulation of the mesoscale diffusion and Mo-Fe-C sites formation over monodispersed hollow Fe@MoS2-C sub-micro reactors for boosted OER performance. According to finite element simulation and analysis, the hollow nanostructured MoS2-C host possesses better mesoscale diffusion properties than its solid and yolk-shell counterparts. Notably, the sulfur vacancies and intercalated carbon in the sub-micro reactor offer a unique microenvironment for Fe anchoring on Mo-Fe-C sites. The stability and activity of the sites are revealed by theoretical calculations. The resultant Fe@MoS2-C presents an OER overpotential of 194 mV, which is much better than those of the Fe-based single-atom catalysts reported in the data. This monodispersed sub-micro reactor involves the modulation of mesoscale diffusion and single-atom sites, and it may have broad prospects for complex electrocatalytic reactions.
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