Facile Synthesis of Sulfur-Doped Mesoporous Carbon Nitride Supported Defect-Rich Cobalt Sulfide for Electrocatalytic Water Oxidation

Abstract

The synthesis of defect-rich materials is of significant interest for electrochemical energy conversion, including water splitting. Herein, we report a novel strategy for the synthesis of sulfur-doped mesoporous conducting carbon nitride supported defect-rich cobalt sulfide (O-Co 3 S 4 @S-MCN). Mesoporous silica material (MCM-41) is used as a template for the synthesis, and it performs dual functions: introducing porosity and providing in situ oxygen to fill the defects. O-Co 3 S 4 @S-MCN is highly crystalline and shows characteristic diffractions indicating the formation of defect-rich Co 3 S 4 . X-ray photoelectron spectroscopy proves the presence of Co−S (777.9 eV) and Co−O (782.4 eV) bonds in O-Co 3 S

One step synthesis of a bimetallic (Ni and Co) metal–organic framework for the efficient electrocatalytic oxidation of water and hydrazine

“…To calculate the electrochemical active surface area (ECSA), CV responses for GC/Ni–MOF, GC/Co–MOF, GC/NiCo–MOF (1 : 1), GC/NiCo–MOF (1 : 3), and GC/NiCo–MOF (3 : 1) were measured at incremental scan rates from 20 to 200 mV s −1 in the potential region, 1.1 to 2.0 V (RHE) where no faradaic process takes place and only double layer charging occurs. 53 The slope obtained from the plot of anodic current density against scan rate gives the value of double layer charge capacitance ( C dl ) as manifested in ESI,† Fig. S9.…”

“…5(A). 53 Chronopotentiometry study was also done to further check the durability of NiCo-MOF (1 : 1) and is compared with the bench-mark catalyst, RuO 2 . In this case, the observed current density of 10 mA cm À2 was found to remain unchanged without degradation for 3 h at NiCo-MOF (1 : 1) while RuO 2 sustains 10 mA cm À2 current density for only up to 400 s, as shown in Fig.…”

Cox(VO)yOz Nanocrystal-Integrated Covalent Organic Polymers as a Highly Active and Durable Catalyst for Electrochemical Water Oxidation: An Untold Role of the VO2+/VO2+ Redox Couple

“…The production of hydrogen fuel through a sustainable and green way can solve the problem of future energy demands to a great extent. Electrochemical water splitting could be a promising approach for the sustainable production of hydrogen. − This mode of hydrogen production is utilized rarely for the industrial production of hydrogen. There are two major reasons behind the rare use of the electrochemical method, first the high cost of the electrode materials and second the high overpotential associated with it (mainly the anodic half reaction, i.e.…”

Electrocatalytic oxygen evolution and antiproliferative activity of Co(III) complexes stabilized by in situ generated bis(5‐furan/phenyl‐1,2,4‐triazole)‐3‐sulfinamide

“…Anodic half-cell reaction of water splitting is the oxygen evolution reaction (OER), and it is a major energy-consuming process due to its sluggish kinetics. [7] The high cost of the current stateof-the-art materials (Ir-and Ru-based materials) is the primary and major cause for the economically inefficient water oxidation. Several catalysts (e.g., metal oxyhydroxides, phosphides, sulfides, and selenides) based on non-noble elements have been reported, and few of them even outperform the state-of-the-art materials in terms of activity.…”