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Zhi L, Tu J, Li J, Li M, Liu J. 3D holey hierarchical nanoflowers assembled by cobalt phosphide embedded N-doped carbon nanosheets as bifunctional electrocatalyst for highly efficient overall water splitting. J Colloid Interface Sci 2022; 616:379-388. [DOI: 10.1016/j.jcis.2022.02.066] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2021] [Revised: 01/30/2022] [Accepted: 02/16/2022] [Indexed: 01/17/2023]
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Biswas R, Thakur P, Kaur G, Som S, Saha M, Jhajhria V, Singh H, Ahmed I, Banerjee B, Chopra D, Sen T, Haldar KK. Interfacial Engineering of CuCo 2S 4/g-C 3N 4 Hybrid Nanorods for Efficient Oxygen Evolution Reaction. Inorg Chem 2021; 60:12355-12366. [PMID: 34320803 DOI: 10.1021/acs.inorgchem.1c01566] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Altering the morphology of electrochemically active nanostructured materials could fundamentally influence their subsequent catalytic as well as oxygen evolution reaction (OER) performance. Enhanced OER activity for mixed-metal spinel-type sulfide (CuCo2S4) nanorods is generally done by blending the material that has high conductive supports together with those having a high surface volume ratio, for example, graphitic carbon nitrides (g-C3N4). Here, we report a noble-metal-free CuCo2S4 nanorod-based electrocatalyst appropriate for basic OER and neutral media, through a simple one-step thermal decomposition approach from its molecular precursors pyrrolidine dithiocarbamate-copper(II), Cu[PDTC]2, and pyrrolidine dithiocarbamate-cobalt(II), Co[PDTC]2 complexes. Transmission electron microscopy (TEM) images as well as X-ray diffraction (XRD) patterns suggest that as-synthesized CuCo2S4 nanorods are highly crystalline in nature and are connected on the g-C3N4 support. Attenuated total reflectance-Fourier-transform infrared (ATR-FTIR), X-ray photoelectron spectroscopy (XPS), and Raman spectroscopy studies affirm the successful formation of bonds that bridge (Co-N/S-C) at the interface of CuCo2S4 nanorods and g-C3N4. The kinetics of the reaction are expedited, as these bridging bonds function as an electron transport chain, empowering OER electrocatalytically under a low overpotential (242 mV) of a current density at 10 mA cm-2 under basic conditions, resulting in very high durability. Moreover, CuCo2S4/g-C3N4 composite nanorods exhibit a high catalytic activity of OER under a neutral medium at an overpotential of 406 mV and a current density of 10 mA cm-2.
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Affiliation(s)
- Rathindranath Biswas
- Department of Chemistry, Central University of Punjab, Bathinda 151001, Punjab, India
| | - Pooja Thakur
- Department of Chemistry, Central University of Punjab, Bathinda 151001, Punjab, India
| | - Gagandeep Kaur
- Institute of Nano Science and Technology, Mohali 140306, Punjab, India
| | - Shubham Som
- Department of Chemistry, Indian Institute of Science Education and Research, Bhopal 462066, Madhya Pradesh, India
| | - Monochura Saha
- Indian Institute of Science Education and Research, Kolkata, Nadia 741246, West Bengal, India
| | - Vandna Jhajhria
- Department of Chemistry, Central University of Punjab, Bathinda 151001, Punjab, India
| | - Harjinder Singh
- Department of Chemistry, Central University of Punjab, Bathinda 151001, Punjab, India
| | - Imtiaz Ahmed
- Department of Chemistry, Central University of Punjab, Bathinda 151001, Punjab, India
| | - Biplab Banerjee
- Department of Chemistry, Central University of Punjab, Bathinda 151001, Punjab, India
| | - Deepak Chopra
- Department of Chemistry, Indian Institute of Science Education and Research, Bhopal 462066, Madhya Pradesh, India
| | - Tapasi Sen
- Institute of Nano Science and Technology, Mohali 140306, Punjab, India
| | - Krishna Kanta Haldar
- Department of Chemistry, Central University of Punjab, Bathinda 151001, Punjab, India
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