Zhang, Z. C.; Liu, G. G.; Cui, X. Y.; Chen, B.; Zhu, Y. H.; Gong, Y.; Saleem, F.; Xi, S. B.; Du, Y. H.; Borgna, A.; Lai, Z. C.; Zhang, Q. H.; Li, B.; Zong, Y.; Han, Y.; Gu, L.; Zhang, H., Crystal phase and architecture engineering of lotus-thalamus-shaped Pt-Ni anisotropic superstructures for highly efficient electrochemical hydrogen evolution. Advanced Materials 2018, 30 (30), DOI: 10.1002/adma.201801741.
Abstract:
The rational design and synthesis of anisotropic 3D nanostructures with specific composition, morphology, surface structure, and crystal phase is of significant importance for their diverse applications. Here, the synthesis of well‐crystalline lotus‐thalamus‐shaped Pt‐Ni anisotropic superstructures (ASs) via a facile one‐pot solvothermal method is reported. The Pt‐Ni ASs with Pt‐rich surface are composed of one Ni‐rich “core” with face‐centered cubic (fcc) phase, Ni‐rich “arms” with hexagonal close‐packed phase protruding from the core, and facet‐selectively grown Pt‐rich “lotus seeds” with fcc phase on the end surfaces of the “arms.” Impressively, these unique Pt‐Ni ASs exhibit superior electrocatalytic activity and stability toward the hydrogen evolution reaction under alkaline conditions compared to commercial Pt/C and previously reported electrocatalysts. The obtained overpotential is as low as 27.7 mV at current density of 10 mA cm−2, and the turnover frequency reaches 18.63 H2 s−1 at the overpotential of 50 mV. This work provides a new strategy for the synthesis of highly anisotropic superstructures with a spatial heterogeneity to boost their promising application in catalytic reactions.
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Funding Info:
This work was supported by Ministry of Education (MOE), Singapore under AcRF Tier 2 (ARC 19/15, MOE2014-T2-2-093, MOE2015-T2-2-057, MOE2016-T2-2-103, MOE2017-T2-1-162) and AcRF Tier 1 (2016-T1-001-147, 2016-T1-002-051, 2017-T1-001-150; 2017-T1-002-119), the National Technological University (NTU), Singapore under Start-Up Grant (M4081296.070.500000) and the National Natural Science Foundation of China (51522212).
Description:
This is the peer reviewed version of the following article: Zhang, Z. C.; Liu, G. G.; Cui, X. Y.; Chen, B.; Zhu, Y. H.; Gong, Y.; Saleem, F.; Xi, S. B.; Du, Y. H.; Borgna, A.; Lai, Z. C.; Zhang, Q. H.; Li, B.; Zong, Y.; Han, Y.; Gu, L.; Zhang, H., Crystal phase and architecture engineering of lotus-thalamus-shaped Pt-Ni anisotropic superstructures for highly efficient electrochemical hydrogen evolution. Advanced Materials 2018, 30 (30), DOI: 10.1002/adma.201801741, which has been published in final form at https://doi.org/10.1002/adma.201801741. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions.