Please use this identifier to cite or link to this item:
http://hdl.handle.net/10397/88669
Title: | Partially hydroxylated ultrathin iridium nanosheets as efficient electrocatalysts for water splitting | Authors: | Cheng, ZF Huang, BL Pi, YC Li, LG Shao, Q Huang, XQ |
Issue Date: | Aug-2020 | Source: | National science review, Aug. 2020, v. 7, no. 8, p. 1340-1348 | Abstract: | Ultrathin two-dimensional (2D) materials have attracted considerable attention for their unique physicochemical properties and promising applications; however, preparation of freestanding ultrathin 2D noble metal remains a significant challenge. Here, for the first time, we report use of a wet-chemical method to synthesize partially hydroxylated ultrathin Ir nanosheets (Ir-NSs) of only five to six atomic layers' thickness. Detailed analysis indicates that the growth confinement effect of carbon monoxide and the partially hydroxylated surface play a critical role in formation of the ultrathin structure. The ultrathin Ir-NSs exhibit excellent performance for both the hydrogen evolution reaction and oxygen evolution reaction in a wide pH range, outperforming the state-of-the-art Pt/C and IrO2, respectively. Density-functional theory calculations reveal that the partial hydroxylation not only enhances the surface electron transfer between Ir-sites and intermediate O-species, but also guarantees efficient initial activation of bond cleavage of H-O-H for first-step H2O splitting. This, ultimately, breaks through barriers to full water splitting, with efficient electron transfer essentially maintained. | Keywords: | Iridium Nanosheet 2D material Hydroxylation Overall water splitting |
Publisher: | Oxford University Press | Journal: | National science review | ISSN: | 2095-5138 | EISSN: | 2053-714X | DOI: | 10.1093/nsr/nwaa058 | Rights: | © The Author(s) 2020. Published by Oxford University Press on behalf of China Science Publishing & Media Ltd. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted reuse, distribution, and reproduction in any medium, provided the original work is properly cited. The following publication Zifang Cheng, Bolong Huang, Yecan Pi, Leigang Li, Qi Shao, Xiaoqing Huang, Partially hydroxylated ultrathin iridium nanosheets as efficient electrocatalysts for water splitting, National Science Review, Volume 7, Issue 8, August 2020, Pages 1340–1348 is available at https://dx.doi.org/10.1093/nsr/nwaa058 |
Appears in Collections: | Journal/Magazine Article |
Files in This Item:
File | Description | Size | Format | |
---|---|---|---|---|
Cheng_Hydroxylated_Ultrathin_Iridium.pdf | 1.95 MB | Adobe PDF | View/Open |
Page views
65
Last Week
0
0
Last month
Citations as of Apr 28, 2024
Downloads
27
Citations as of Apr 28, 2024
SCOPUSTM
Citations
57
Citations as of Apr 26, 2024
WEB OF SCIENCETM
Citations
56
Citations as of May 2, 2024
Google ScholarTM
Check
Altmetric
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.