Please use this identifier to cite or link to this item:
https://hdl.handle.net/10356/139059
Title: | Engineering morphologies of cobalt pyrophosphates nanostructures toward greatly enhanced electrocatalytic performance of oxygen evolution reaction | Authors: | Du, Hongfang Ai, Wei Zhao, Zhi Liang Chen, Yu Xu, Xin Zou, Chenji Wu, Lishu Su, Lan Nan, Kaikai Yu, Ting Li, Chang Ming |
Keywords: | Science::Physics | Issue Date: | 2018 | Source: | Du, H., Ai, W., Zhao, Z. L., Chen, Y., Xu, X., Zou, C., . . . Li, C. M. (2018). Engineering morphologies of cobalt pyrophosphates nanostructures toward greatly enhanced electrocatalytic performance of oxygen evolution reaction. Small, 14(31), 1801068-. doi:10.1002/smll.201801068 | Journal: | Small | Abstract: | Herein, a surfactant- and additive-free strategy is developed for morphology-controllable synthesis of cobalt pyrophosphate (CoPPi) nanostructures by tuning the concentration and ratio of the precursor solutions of Na4 P2 O7 and Co(CH3 COO)2 . A series of CoPPi nanostructures including nanowires, nanobelts, nanoleaves, and nanorhombuses are prepared and exhibit very promising electrocatalytic properties toward the oxygen evolution reaction (OER). Acting as both reactant and pseudo-surfactant, the existence of excess Na4 P2 O7 is essential to synthesize CoPPi nanostructures for unique morphologies. Among all CoPPi nanostructures, the CoPPi nanowires catalyst renders the best catalytic performance for OER in alkaline media, achieving a low Tafel slope of 54.1 mV dec-1 , a small overpotential of 359 mV at 10 mA cm-2 , and superior stability. The electrocatalytic activities of CoPPi nanowires outperform the most reported non-noble metal based catalysts, even better than the benchmark Ir/C (20%) catalyst. The reported synthesis of CoPPi gives guidance for morphology control of transition metal pyrophosphate based nanostructures for a high-performance inexpensive material to replace the noble metal-based OER catalysts. | URI: | https://hdl.handle.net/10356/139059 | ISSN: | 1613-6810 | DOI: | 10.1002/smll.201801068 | Rights: | © 2018 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim. All rights reserved. | Fulltext Permission: | none | Fulltext Availability: | No Fulltext |
Appears in Collections: | SPMS Journal Articles |
SCOPUSTM
Citations
10
19
Updated on Mar 10, 2021
PublonsTM
Citations
10
20
Updated on Mar 9, 2021
Page view(s)
152
Updated on Jun 27, 2022
Google ScholarTM
Check
Altmetric
Items in DR-NTU are protected by copyright, with all rights reserved, unless otherwise indicated.