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https://hdl.handle.net/2440/122501
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Type: | Journal article |
Title: | Intermediate modulation on noble metal hybridized to 2D metal-organic framework for accelerated water electrocatalysis |
Author: | Guo, C. Jiao, Y. Zheng, Y. Luo, J. Davey, K. Qiao, S.Z. |
Citation: | Chem, 2019; 5(9):2429-2441 |
Publisher: | Elsevier |
Issue Date: | 2019 |
ISSN: | 2451-9308 2451-9294 |
Statement of Responsibility: | Chunxian Guo, Yan Jiao, Yao Zheng, Jun Luo, Kenneth Davey, Shi-Zhang Qiao |
Abstract: | The rational modulation of reaction intermediates is critical to achieving high-performance heterogeneous catalysis. However, practical realization remains challenging. Using water electrocatalysis as a model reaction, we report an interfacial-bond-induced intermediate modulation to accelerate the hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) by hybridizing a 2D nickel metal-organic framework (MOF) and Pt nanocrystals into a heterostructure. The design is initially verified via theoretical calculations, indicating charge relocation on newly formed Ni–O–Pt interfacial bonds for increased OH* adsorption energy together with reduced H* adsorption energy. Experimental findings confirm the formation of the Ni–O–Pt bonds, which electronically modify the heterostructure to increase electron density for Pt and the high-energy Ni 3d state for the MOF, optimizing the adsorption for H* and OH*, respectively. This hybridized material delivered HER activity of 7.92 mA μg−1 Pt, which is among the best reported for alkaline electrocatalysts, and an improved OER activity. |
Rights: | © 2019 Elsevier Inc. |
DOI: | 10.1016/j.chempr.2019.06.016 |
Grant ID: | http://purl.org/au-research/grants/arc/FL170100154 http://purl.org/au-research/grants/arc/DE160101293 http://purl.org/au-research/grants/arc/DP160104866 http://purl.org/au-research/grants/arc/DP170104464 |
Published version: | http://dx.doi.org/10.1016/j.chempr.2019.06.016 |
Appears in Collections: | Aurora harvest 8 Chemical Engineering publications |
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