Arindam Kumar Das

• Central Salt and Marine Chemicals Research Institute

Electrolysis is seen as a promising route for the production of hydrogen from water, as part of a move to a wider “hydrogen economy”. The electro-oxidation of renewable feedstocks offers an alternative anode couple to the (high-overpotential) electrochemical oxygen evolution reaction for developing low-voltage electrolysers. Meanwhile, the explorat...

Synthesis of 4-(N-isopropylacrylamido)butane-1-sulfonic acid monomer has been achieved by sultone ring opening followed by condensation reaction. Stable and flexible bi-functional cation exchange membranes have been prepared by dehydofluorinated poly(vinylidene fluoride-co-hexafluoropropylene) and 4-(N-isopropylacrylamido)butane-1-sulfonic acid in...

Acid and oxidative resistant sulphonated copolymer cation exchange membrane (CEM) was prepared and electro-electrodialysis experiments were performed to improve HI molality in the HIx (HI + I2) mixture. Reported membrane was prepared by chemical grafting of 2-methyl-2-(N-(3-sulfopropyl)acrylamido)propane-1- sulfonic acid with dehydofluorinated poly...

A sulfonated poly(ether ether ketone) (SPEEK) and phosphorylated graphene oxide (PGO) composite of a cation-exchange membrane with low frictional coefficient and high limiting current density has been reported for water desalination by rapid electrodialysis. The incorporation of PGO in the membrane matrix showed a significant impact on the macrosco...

The acid/oxidative-resistant aliphatic-polymer-based cation-exchange membrane (CEM) is urgently required for water splitting by iodine-sulfur electrochemical Bunsen process (I-S cycle). Under operating environment of I-S cycle, commercially available CEM (perfluorosulfonic acid polymers such as Nafion) exhibits excessive mass transfer via electro-o...

Layer-by-layer casting technique was adopted to fabricate bipolar membranes (BPMs) comprising cation exchange layer (CEL), interfacial layer (IL, phosphorylated graphene oxide (PGO) and/or quaternized graphene oxide (QGO)) and anion exchange layer (AEL). Under applied DC potential gradient, water molecules dissociate at IL and generate H+ and OH-....

We disclosed an alternative method for controlled chloromethylation of poly(2,6-dimethyl-1,4-phenylene oxide) (PPO) in presence of paraformaldehyde, tri-methyl chlorosilane and Lewis acid catalyst. About 35–74% degree of chloromethylation (DCM) of PPO was achieved under optimized conditions. Reported method avoids the use of hazardous chemicals (su...

For developing acid/oxidative resistant aliphatic polymer based cation-exchange membrane (CEM), macromolecular modification of poly(vinylidene fluoride-co-hexafluoropropylene) (PVDF-co-HFP) was carried out by controlled chemical grafting of 2-acrylamido-2-methyl-1-propanesulfonic acid (AMPS). To introduce the unsaturation suitable for chemical graf...