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|Title:||In situ grown epitaxial heterojunction exhibits high-performance electrocatalytic water splitting|
|Citation:||Advanced Materials, 2018; 30(13):1705516-1-1705516-8|
|Changrong Zhu, An-Liang Wang, Wen Xiao, Dongliang Chao, Xiao Zhang, Nguyen Huy Tiep, Shi Chen, Jiani Kang, Xin Wang, Jun Ding, John Wang, Hua Zhang, and Hong Jin Fan|
|Abstract:||Electrocatalytic performance can be enhanced by engineering a purposely designed nanoheterojunction and fine-tuning the interface electronic structure. Herein a new approach of developing atomic epitaxial in-growth in Co-Ni₃N nanowires array is devised, where a nanoconfinement effect is reinforced at the interface. The Co-Ni₃N heterostructure array is formed by thermal annealing NiCo₂O₄ precursor nanowires under an optimized condition, during which the nanowire morphology is retained. The epitaxial in-growth structure of Co-Ni₃N at nanometer scale facilitates the electron transfer between the two different domains at the epitaxial interface, leading to a significant enhancement in catalytic activities for both hydrogen and oxygen evolution reactions (10 and 16 times higher in the respective turnover frequency compared to Ni₃N-alone nanorods). The interface transfer effect is verified by electronic binding energy shift and density functional theory (DFT) calculations. This nanoconfinement effect occurring during in situ atomic epitaxial in-growth of the two compatible materials shows an effective pathway toward high-performance electrocatalysis and energy storages.|
|Keywords:||Epitaxial in-growth; hydrogen evolution reaction; metal nitride arrays; nanoconfinement; oxygen evolution reaction|
|Description:||Published online: February 13, 2018|
|Rights:||© 2018 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim|
|Appears in Collections:||Aurora harvest 4|
Chemical Engineering publications
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