A study on the characteristics of low concentration nickel plating electrolyte

With the recent escalation in power costs energy conservation has become a major concern of industry. This concern is particularly felt by platers who are faced not only with high energy costs,but also with increasing government restriction on pollution and safety regulation. It is no wonder that platers are continually seeking newer ways to save energy. With lesser drag out rinse solution and low energy consumption. Low concentration plating baths operating at low temperature offer a new field of development. Nickel plating being the hub of the electroplating industry, research work carried out in this laboratory indicates the suitability of low concentrated nickel bath in replacing the conventional Watt's system. In this preliminary report, the authors present a study on the bath characteristics such as current density range, efficiency, and throwing power in comparison to watt's nickel bath

Manifestation of Concealed Defects in MoS2 Nanospheres for Efficient and Durable Electrocatalytic Hydrogen Evolution Reaction

MoS2 nanospheres were formed using a template free hydrothermal process, which exhibit high catalytic activity towards hydrogen evolution reaction (HER). The extend of defect sites are probed by extended X-ray absorption fine structure which found decrease in co-ordination number at Mo site rather than at S site. DFT calculations identified an uneven strain and defect distribution between two S planes of curved MoS2. Based on hydrogen adsorption on various sites, we identify a new pathway called “extended activity @ shielded defects”, for Volmer-Tafel and Volmer-Heyrovsky mechanisms, where H adsorption occurs at exposed S layer driven by defects in underneath S layer of nanosphere. Having higher defect concentration it exhibited excellent HER activity with overpotential of �0.12 V, Tafel slope of 90 mV/decade, and higher turnover frequency. Our findings provide an avenue to design and engineer advanced nanostructures for catalysis, electronic devices, and other potential applications

Lead plating of aluminium connectors for batteries

This paper reports the processing cycle required for the production of strongly adherent lead coating on aluminium connectors for use in the battery fiel

Titanium Substrate Insoluble Anode (TSIA)

A process has been developed for the production of structurally stable metal anode called "Titanium Substrate Insoluble Anode' (TSIA) - a technically and economically viable substitute for the conventional graphite electrodes used in electrochemical industries. With a coating of electrocatalytic materials of platinum group metals viz., ruthenium, iridium, palladium, etc. or its oxides or mixtures of oxides of platinum groups metals and valve metals (like Ti, Ta and Zr), the TSIA have better conducting property and dimensional stability, lower overvoltage and longer life. Further these anodes are characterised by good chemical and mechanical stability. Adoption of these TSIA results in lower consumption and purer products. The main users of this type of anodes are the chlor-alkali and chlorates which consumes electrical energy as one of the main raw materials accounting for more than 50% as above production cost. These anodes can also be used (a) in sea water electrolysis for in-situ generation of hypochlorite, (b) electrowinning (c) cathodic protection by impressed current technique (d) electrodialysis (e) electro-organic/inorganic synthesis, etc