Jeongwon Kim Jang, Yu Jin Jang, Yoon Hee 2024-01-12T02:33:29Z 2024-01-12T02:33:29Z 2023-01-12 2023-01 1996-1944 https://pubs.kist.re.kr/handle/201004/75856 Hydrogen production via water splitting has been extensively explored over the past few decades, and considerable effort has been directed toward finding more reactive and costeffective electrocatalysts by engineering their compositions, shapes, and crystal structures. In this study, we developed hierarchical cobalt phosphide (Co-P) nanosphere assemblies as non-noble metal electrocatalysts via one-step electrodeposition. The morphologies of the Co-P nanostructures and their electrocatalytic activities towards the hydrogen evolution reactions (HER) were controlled by the applied potentials during electrodeposition. The physicochemical properties of the as-prepared Co-P nanostructures in this study were characterized by field-emission scanning electron microscopy, X-ray photoemission spectroscopy and X-ray diffraction. Linear sweep voltammetry revealed that the Co-P grown at ？0.9 V showed the best HER performance exhibiting the highest electrochemical active surface area and lowest interfacial charge transfer resistance. The Co-P electrocatalysts showed superior long-term stability to electrodeposited Pt, indicating their potential benefits. English MDPI Open Access Publishing Electrodeposition of Stable Noble-Metal-Free Co-P Electrocatalysts for Hydrogen Evolution Reaction Article 10.3390/ma16020593 1 Materials, v.16, no.2, pp.593 Materials 16 2 593 Y scie scopus 000918974600001 Chemistry, Physical Materials Science, Multidisciplinary Metallurgy & Metallurgical Engineering Physics, Applied Physics, Condensed Matter Chemistry Materials Science Metallurgy & Metallurgical Engineering Physics Article EFFICIENT BIFUNCTIONAL ELECTROCATALYST NANOTUBES ACID cobalt phosphide electrodeposition hydrogen evolution reaction electrocatalyst long-term stability