In Situ Ni-Doped Co3O4 Nanostructure: An Efficient Electro catalyst for Hydrogen Evolution
: Basu, Arijit; Srinivasa, N; Ashoka, S; De, Debasis
: Muthukumar, P.; Sarkar, Dilip Kumar; De, Debasis; De, Chanchal Kumar
: Innovations in Sustainable Energy and Technology
: 2021
: Advances in Sustainability Science and Technology
: Innovations in Sustainable Energy and Technology: Proceedings of ISET 2020
: 35
: 47
: 978-981-16-1118-6
: 978-981-16-1119-3
: 2662-6829
: 2662-6837
DOI: https://doi.org/10.1007/978-981-16-1119-3_4(external)
: https://doi.org/10.1007/978-981-16-1119-3_4(external)
The paper represents an environmentally strong facile one-pot wet chemical synthesis for the production of nickel (Ni) doped cobalt oxide (Co3O4) at different weight% (1, 3, 5, 7 and 10%) of Ni that demonstrates efficient electrocatalysis towards hydrogen evolution reaction (HER), in 1M KOH solution. The Ni doped Co3O4 were synthesized using cobalt nitrate hexahydrate {Co(NO3)2.6H2O}, nickel nitrate hexahydrate {Ni(NO3)2.6H2O}and citric acid {C6H8O7}, among which 7% Ni-doped Co3O4 proved to be an optimal HER catalysis. Nickel foam electrode drop cast with Ni-doped Co3O4 displayed remarkable HER catalysis with an overpotential (η) of 212 mV (vs RHE) recorded at 50 mA/cm2. The composite also exhibits Tafel slope of 48 mV/dec @ HER which is kinetically more efficient. 7% Ni-doped Co3O4 has the potential to replace precious-metal-based catalysts as the anodic/cathodic material within electrolyzers, reducing the associated costs of hydrogen production from water splitting.
