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Facile Synthesis of Mixed Valance Manganese Oxide Hydroxide Supported Palladium Nanostructures—Active Electrocatalysts for Polyhydric Alcohol Oxidation and Its Poisonous Management

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In this communication, nanostructured palladium (Pd) nanoparticles grafted in a mixed valance manganese oxide material, such as manganese (oxy) hydroxide and manganese oxide (MnOOH and Mn3O4; MMOH) nanorods, were developed by a simple two-step process and explored its catalytic activity towards polyhydric alcohol (Xylitol) electro-oxidation in alkaline medium. The prepared nanocatalyst was characterized by powder X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), energy-dispersive X-ray spectroscopy (EDS), X-ray photoelectron spectroscopy (XPS) and electrochemical methods. The XRD and XPS analysis show that the prepared MMOH is mixed valance (Mn3+/Mn4+), and the microscopic results confirm the Pd nanoparticles uniformly coated on the MMOH. The cyclic voltammetric studies reveal that the MMOH/Pd catalyst-modified electrode exhibited improved electrocatalytic activity for Xylitol electrooxidation compared to C/Pd. The intermediates formed during the electro-oxidation reactions were removed by increasing the forward scanning potential from +0.2 V to +0.8 V. The catalytic involvement of MMOH nanorods in poison management is discussed in detail. This study demonstrates the MMOH acts as a superior catalytic supporting material for noble metal catalyst towards polyalcohol electro-oxidation.
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Keywords: Mixed Valance Manganese Oxide; Nanostructured Palladium; Oxygen Evolution; Poisonous Effect; Xylitol

Document Type: Research Article

Affiliations: 1: Hydrogen and Fuel Cell Research Centre and Graduate School, Department of Energy Storage/Conversion Engineering, Chonbuk National University, Jeollabuk-do 561-756, Republic of Korea 2: Department of Chemistry, Kunsan National University, Gunsan, Jeollbuk-do 573-701, Republic of Korea

Publication date: August 1, 2017

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  • Journal for Nanoscience and Nanotechnology (JNN) is an international and multidisciplinary peer-reviewed journal with a wide-ranging coverage, consolidating research activities in all areas of nanoscience and nanotechnology into a single and unique reference source. JNN is the first cross-disciplinary journal to publish original full research articles, rapid communications of important new scientific and technological findings, timely state-of-the-art reviews with author's photo and short biography, and current research news encompassing the fundamental and applied research in all disciplines of science, engineering and medicine.
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