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https://hdl.handle.net/2440/112064
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Type: | Journal article |
Title: | NiO as a bifunctional promoter for RuO₂ toward superior overall water splitting |
Other Titles: | NiO as a bifunctional promoter for RuO(2) toward superior overall water splitting |
Author: | Liu, J. Zheng, Y. Jiao, Y. Wang, Z. Lu, Z. Vasileff, A. Qiao, S. |
Citation: | Small, 2018; 14(16):1704073-1-1704073-10 |
Publisher: | Wiley-VCH Verlag GmbbH & Co. |
Issue Date: | 2018 |
ISSN: | 1613-6810 1613-6829 |
Statement of Responsibility: | Jinlong Liu, Yao Zheng, Yan Jiao, Zhenyu Wang, Zhouguang Lu, Anthony Vasileff, and Shi-Zhang Qiao |
Abstract: | Conventional development of nanomaterials for efficient electrocatalysis is largely based on performance-oriented trial-and-error/iterative approaches, while a rational design approach at the atomic/molecular level is yet to be found. Here, inspired by a fundamental understanding of the mechanism for both oxygen and hydrogen evolution half reactions (OER/HER), a unique strategy is presented to engineer RuO₂ for superior alkaline water electrolysis through coupling with NiO as an efficient bifunctional promoter. Benefitting from desired potential-induced interfacial synergies, NiO-derived NiOOH improves the oxygen binding energy of RuO₂ for enhanced OER, and NiO also promotes water dissociation for enhanced HER on RuO₂ -derived Ru. The resulting hybrid material exhibits remarkable bifunctional activities, affording 2.6 times higher OER activity than that of RuO₂ and an HER activity comparable to Pt/C. As a result, the simple system requires only 1.5 V to deliver 10 mA cm⁻² for overall alkaline water splitting, outperforming the benchmark PtC/NF||IrO₂ /NF couple with high mass loading. Comprehensive electrochemical investigation reveals the unique and critical role of NiO on the optimized RuO₂ /NiO interface for synergistically enhanced activities, which may be extended to broader (electro)catalytic systems. |
Keywords: | bifunctional promoters electrocatalysts nickel oxide ruthenium dioxide water splitting |
Description: | Published online: March 15, 2018 |
Rights: | © 2018 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim |
DOI: | 10.1002/smll.201704073 |
Grant ID: | http://purl.org/au-research/grants/arc/DP160104866 http://purl.org/au-research/grants/arc/DP170104464 http://purl.org/au-research/grants/arc/LP160100927 http://purl.org/au-research/grants/arc/FL170100154 |
Published version: | http://dx.doi.org/10.1002/smll.201704073 |
Appears in Collections: | Aurora harvest 3 Chemical Engineering publications |
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