Noble Metal Ion-Directed Assembly of 2D Materials for Heterostructured Catalysts and Metallic Micro-Texturing

dc.contributor.authorLittle, Joshua M.
dc.contributor.authorSun, Jiayue
dc.contributor.authorKamali, Ali
dc.contributor.authorChen, Amy
dc.contributor.authorLeff, Asher C.
dc.contributor.authorLi, Yang
dc.contributor.authorBorden, Leah K.
dc.contributor.authorDissanayake, Thilini U.
dc.contributor.authorEssumang, Deborah
dc.contributor.authorOseleononmen, Benita O.
dc.contributor.authorLiu, Dongxia
dc.contributor.authorWoehl, Taylor J.
dc.contributor.authorChen, Po-Yen
dc.description.abstractAssembling 2D-material (2DM) nanosheets into micro- and macro-architectures with augmented functionalities requires effective strategies to overcome nanosheet restacking. Conventional assembly approaches involve external binders and/or functionalization, which inevitably sacrifice 2DM's nanoscale properties. Noble metal ions (NMI) are promising ionic crosslinkers, which can simultaneously assemble 2DM nanosheets and induce synergistic properties. Herein, a collection of NMI–2DM complexes are screened and categorized into two sub-groups. Based on the zeta potentials, two assembly approaches are developed to obtain 1) NMI-crosslinked 2DM hydrogels/aerogels for heterostructured catalysts and 2) NMI–2DM inks for templated synthesis. First, tetraammineplatinum(II) nitrate (TPtN) serves as an efficient ionic crosslinker to agglomerate various 2DM dispersions. By utilizing micro-textured assembly platforms, various TPtN–2DM hydrogels are fabricated in a scalable fashion. Afterward, these hydrogels are lyophilized and thermally reduced to synthesize Pt-decorated 2DM aerogels (Pt@2DM). The Pt@2DM heterostructures demonstrate high, substrate-dependent catalytic activities and promote different reaction pathways in the hydrogenation of 3-nitrostyrene. Second, PtCl4 can be incorporated into 2DM dispersions at high NMI molarities to prepare a series of PtCl4–2DM inks with high colloidal stability. By adopting the PtCl4–graphene oxide ink, various Pt micro-structures with replicated topographies are synthesized with accurate control of grain sizes and porosities.
dc.identifier.citationLittle, J. M., Sun, J., Kamali, A., Chen, A., Leff, A. C., Li, Y., Borden, L. K., Dissanayake, T. U., Essumang, D., Oseleononmen, B. O., Liu, D., Woehl, T. J., Chen, P.-Y., Noble Metal Ion-Directed Assembly of 2D Materials for Heterostructured Catalysts and Metallic Micro-Texturing. Adv. Funct. Mater. 2023, 33, 2215222.
dc.relation.isAvailableAtDigital Repository at the University of Marylanden_us
dc.relation.isAvailableAtUniversity of Maryland (College Park, MD)en_us
dc.relation.isAvailableAtA. James Clark School of Engineeringen_us
dc.relation.isAvailableAtChemical & Biomolecular Engineeringen_us
dc.subject2D materials
dc.subjectheterostructured catalysts
dc.subjectnoble metal ions
dc.subjectnoble metal nanocrystals
dc.subjecttemplated synthesis
dc.subjectTi 3C 2T x MXene
dc.titleNoble Metal Ion-Directed Assembly of 2D Materials for Heterostructured Catalysts and Metallic Micro-Texturing


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