Hierarchical architectures of mesoporous Pd on highly ordered TiO₂ nanotube arrays for electrochemical CO₂ reduction

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dc.contributor.authorZou, J.
dc.contributor.authorIqbal, M.
dc.contributor.authorVijayakumar, A.
dc.contributor.authorWang, C.
dc.contributor.authorMacfarlane, D.R.
dc.contributor.authorYamauchi, Y.
dc.contributor.authorLee, C.-Y.
dc.contributor.authorWallace, G.G.
dc.date.issued2020
dc.description.abstractThe understanding of the influence of hierarchically nanostructured architectures as support materials for catalysts loading, is critical towards development of efficient electrocatalytic interfaces. The knowledge on mass transport limitation of reactants within such catalyst-support structures remains elusive. Herein, we performed systematic investigation through a novel hierarchical 1D–3D structure by loading mesoporous Pd with an average pore size of ∼10 nm and wall thickness of ∼4 nm onto highly ordered TiO₂ nanotube arrays via pulse electrodeposition. Electrochemical CO₂ reductions achieved a CO₂-toformate faradaic conversion efficiency of 88 ± 2% under optimal conditions. Importantly, the product selectivity is found to depend significantly on the tube length, highlighting the influence of mass transport limitations of CO₂. This work offers vital insight into practical consideration in designing efficient catalyst-support interfaces with an optimal hierarchically geometry, that must optimise mass transport as well as electrochemical kinetics.
dc.description.statementofresponsibilityJinshuo Zou, Muhammad Iqbal, Amruthalakshmi Vijayakumar, Caiyun Wang, Douglas R. Macfarlane, Yusuke Yamauchi, Chong-Yong Lee, and Gordon G. Wallace
dc.identifier.citationJournal of Materials Chemistry A, 2020; 8(16):8041-8048
dc.identifier.doi10.1039/d0ta02077j
dc.identifier.issn2050-7488
dc.identifier.issn2050-7496
dc.identifier.urihttps://hdl.handle.net/2440/146153
dc.language.isoen
dc.publisherRoyal Society of Chemistry (RSC)
dc.relation.granthttp://purl.org/au-research/grants/arc/CE140100012
dc.rights© The Royal Society of Chemistry 2020
dc.source.urihttps://doi.org/10.1039/d0ta02077j
dc.subjectnanostructured architectures; Hierachy; Transport; catalyst-support structures; systematic investigation; novel hierarchical 1D–3D structure; TiO2; nanotube arrays; pulse electrodeposition; Electrochemical CO2
dc.titleHierarchical architectures of mesoporous Pd on highly ordered TiO₂ nanotube arrays for electrochemical CO₂ reduction
dc.typeJournal article
pubs.publication-statusPublished online

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