Patil, Supriya A. Shinde, Dipak V. Lim, Iseul Cho, Keumnam Bhande, Sambhaji S. Mane, Rajaram S. Shrestha, Nabeen K. Lee, Joong Kee Yoon, Tae Hyun Han, Sung-Hwan 2024-01-20T07:31:21Z 2024-01-20T07:31:21Z 2021-09-05 2015-04 2050-7488 https://pubs.kist.re.kr/handle/201004/125616 Based on a coordination chemistry approach, the present work reports on the synthesis of thin films of various cobalt hydroxycarbonate nanostructures such as nanobeams, nanoneedles, and bending nanorods using three different cobalt precursors viz. Cl-, NO3- and CH3COO-. After pyrolysis in air, the hydroxycarbonate nanostructures are transferred into 1-D arrays of Co3O4 nanorods. The obtained 1-D Co3O4 nanostructures are then transformed into the corresponding analogous shaped 1-D arrays of porous cobalt sulfide (CoS1.0365) nanostructures using a wet chemical transformation method based on an ion exchange approach. The nanostructured films before and after the ion exchange reaction are characterized using field emission electron scanning microscopy, X-ray diffraction, energy dispersive X-ray spectroscopy, X-ray photoelectron spectroscopy, transmission electron microscopy (TEM), and inductively coupled plasma mass spectroscopy (ICP-MS) measurements. As a proof-of-concept demonstration for the application, various shaped CoS1.0365 nanorod films synthesized are investigated as a Pt-free counter electrode in dye-sensitized-solar cells (DSSCs). The influence of three different counter anions of the cobalt precursors on the structural, textural, and morphological aspects, and thereby their influence on electronic and electrochemical properties, has been investigated. A correlation among electrical conductivity, charge transfer resistance and electrocatalytic performance of various CoS1.0365 nanorod films obtained from different cobalt precursors has been established. Among the various nanostructures, the thicker nanorod film synthesized using a chloride precursor has demonstrated the best electrocatalytic behavior toward triiodide reduction, which led to a short circuit current density of 18.04 mA cm(-2) and energy conversion efficiency of 7.4% of the DSSC. This photovoltaic performance is highly competitive to a current density of 18.26 mA cm(-2) and energy conversion efficiency of 7.7% exhibited by the standard Pt counter electrode. English ROYAL SOC CHEMISTRY BUBBLE TEMPLATE SYNTHESIS CATION-EXCHANGE CHEMICAL-TRANSFORMATIONS FACILE SYNTHESIS HOLLOW SPHERES NANOCRYSTALS ZNO MICROSPHERES COMPOSITE NETWORKS An ion exchange mediated shape-preserving strategy for constructing 1-D arrays of porous CoS1.0365 nanorods for electrocatalytic reduction of triiodide Article 10.1039/c5ta00494b 1 JOURNAL OF MATERIALS CHEMISTRY A, v.3, no.15, pp.7900 - 7909 JOURNAL OF MATERIALS CHEMISTRY A 3 15 7900 7909 scie scopus 000352441100029 2-s2.0-84926443531 Chemistry, Physical Energy & Fuels Materials Science, Multidisciplinary Chemistry Energy & Fuels Materials Science Article BUBBLE TEMPLATE SYNTHESIS CATION-EXCHANGE CHEMICAL-TRANSFORMATIONS FACILE SYNTHESIS HOLLOW SPHERES NANOCRYSTALS ZNO MICROSPHERES COMPOSITE NETWORKS ion exchange 1-D arrays of porous CoS1.0365 nanorods shape-preserving strategy electrocatalytic reduction triiodide