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Title: Construction of Ni(CN)₂ /NiSe₂ heterostructures by stepwise topochemical pathways for efficient electrocatalytic oxygen evolution
Authors: Nai, Jianwei
Xu, Xiangzhen
Xie, Qifan
Lu, Gongxun
Wang, Yao
Luan, Deyan
Tao, Xinyong
Lou, David Xiong Wen
Keywords: Engineering::Chemical engineering
Issue Date: 2022
Source: Nai, J., Xu, X., Xie, Q., Lu, G., Wang, Y., Luan, D., Tao, X. & Lou, D. X. W. (2022). Construction of Ni(CN)₂ /NiSe₂ heterostructures by stepwise topochemical pathways for efficient electrocatalytic oxygen evolution. Advanced Materials, 34(4), e2104405-.
Project: RG3/20
Journal: Advanced Materials
Abstract: Exploiting effective electrocatalysts based on elaborate heterostructures for the oxygen evolution reaction (OER) has been considered as a promising strategy for boosting water splitting efficiency to produce the clean energy-hydrogen. However, constructing catalytically active heterostructures with novel composition and architecture remains poorly developed due to the synthetic challenge. In this work, it is demonstrated that unique Ni(CN)2 /NiSe2 heterostructures, composed of single-crystalline Ni(CN)2 nanoplates surrounded by crystallographically aligned NiSe2 nanosatellites, can be created from nickel-based Hofmann-type coordination polymers through stepwise topochemical pathways. When employed as the OER electrocatalyst, the Ni(CN)2 /NiSe2 heterostructures show enhanced performance, which could be attributed to optimized geometric and electronic structures of the catalytic sites endowed by the synergy between the two components. This work demonstrates a rational synthetic route for creating a novel Ni-based OER electrocatalyst that possesses nanoscale heterostructure, whose composition, spatial organization, and interface configuration can be finely manipulated.
ISSN: 0935-9648
DOI: 10.1002/adma.202104405
Rights: © 2021 Wiley-VCH GmbH. All rights reserved.
Fulltext Permission: none
Fulltext Availability: No Fulltext
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