A 2D metal-organic framework/Ni(OH)₂ heterostructure for an enhanced oxygen evolution reaction

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dc.contributor.authorZhu, D.
dc.contributor.authorLiu, J.
dc.contributor.authorWang, L.
dc.contributor.authorDu, Y.
dc.contributor.authorZheng, Y.
dc.contributor.authorDavey, K.
dc.contributor.authorQiao, S.
dc.date.issued2019
dc.description.abstract2D metal-organic frameworks (MOFs) are widely regarded as promising electrocatalysts for the oxygen evolution reaction (OER). This results from their inherent properties such as a large portion of surface coordinatively unsaturated metal atoms, rapid mass transfer and enhanced conductivity. However, 2D MOFs have a strong tendency to aggregate, which severely limits their potential application in the OER. Here, novel 2D Ni-BDC/Ni(OH)₂ (BDC stands for 1,4-benzenedicarboxylate, C₈H₄O₄) hybrid nanosheets are synthesized via a facile sonication-assisted solution method. Because of the rational material design, the large surface area of Ni-BDC is maintained. Significantly, after coupling, the electronic structure of Ni atoms in the Ni(OH)₂ component is well modified, leading to the generation of Ni cations with higher oxidation states, which are desirable for the OER. As-prepared Ni-BDC/Ni(OH)₂ exhibits high activity, favorable kinetics and strong durability towards the OER. Specifically, the OER current density of Ni-BDC/Ni(OH)₂ is 82.5 mA cm⁻² at 1.6 V versus a reversible hydrogen electrode (RHE), which is significantly greater than those of Ni-BDC (5.5 times), Ni(OH)₂ (20.6 times) and Ir/C (3.0 times). Moreover, the sonication-assisted method developed in this work can be readily adapted for the preparation of various 2D MOF-based hybrid functional materials.
dc.description.statementofresponsibilityDongdong Zhu, Jinlong Liu, Liang Wang, Yi Du, Yao Zheng, Kenneth Davey and Shi-Zhang Qiao
dc.identifier.citationNanoscale, 2019; 11(8):3599-3605
dc.identifier.doi10.1039/c8nr09680e
dc.identifier.issn2040-3364
dc.identifier.issn2040-3372
dc.identifier.orcidLiu, J. [0000-0002-4726-0972]
dc.identifier.orcidZheng, Y. [0000-0002-2411-8041]
dc.identifier.orcidDavey, K. [0000-0002-7623-9320]
dc.identifier.orcidQiao, S. [0000-0002-1220-1761] [0000-0002-4568-8422]
dc.identifier.urihttp://hdl.handle.net/2440/118361
dc.language.isoen
dc.publisherRoyal Society of Chemistry
dc.relation.granthttp://purl.org/au-research/grants/arc/DP140104062
dc.relation.granthttp://purl.org/au-research/grants/arc/DP160104866
dc.relation.granthttp://purl.org/au-research/grants/arc/DP170104464
dc.relation.granthttp://purl.org/au-research/grants/arc/LP160100927
dc.rightsThis journal is © The Royal Society of Chemistry 2019
dc.source.urihttps://doi.org/10.1039/c8nr09680e
dc.titleA 2D metal-organic framework/Ni(OH)₂ heterostructure for an enhanced oxygen evolution reaction
dc.typeJournal article
pubs.publication-statusPublished

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