This work presents Cobalt-Boride (Co-B) as a non-noble, efficient and robust electrocatalyst for Hydrogen Evolution Reaction (HER) active in aqueous solution of wide pH values. In neutral solution, amorphous Co-B nanoparticles (30-50 nm size) generate high current density (10 mA/cm(2)) at low overpotential (250 mV) with Tafel slope of 75 mV/dec following Volmer-Heyrovsky reaction mechanism. Highly active Co surface sites created by electronic transfer from B to Co (as inferred from XPS analysis and supported by theoretical calculations) are responsible for this significant HER activity in wide range of pH (4-9) values. Stability and reusability tests also demonstrate the robust nature of the catalyst.

Cobalt-Boride: An efficient and robust electrocatalyst for Hydrogen Evolution Reaction / Gupta, S.; Patel, Nainesh Kantilal; Miotello, Antonio; Kothari, D. C.. - In: JOURNAL OF POWER SOURCES. - ISSN 0378-7753. - STAMPA. - 279:(2015), pp. 620-625. [10.1016/j.jpowsour.2015.01.009]

Cobalt-Boride: An efficient and robust electrocatalyst for Hydrogen Evolution Reaction

Patel, Nainesh Kantilal;Miotello, Antonio;
2015-01-01

Abstract

This work presents Cobalt-Boride (Co-B) as a non-noble, efficient and robust electrocatalyst for Hydrogen Evolution Reaction (HER) active in aqueous solution of wide pH values. In neutral solution, amorphous Co-B nanoparticles (30-50 nm size) generate high current density (10 mA/cm(2)) at low overpotential (250 mV) with Tafel slope of 75 mV/dec following Volmer-Heyrovsky reaction mechanism. Highly active Co surface sites created by electronic transfer from B to Co (as inferred from XPS analysis and supported by theoretical calculations) are responsible for this significant HER activity in wide range of pH (4-9) values. Stability and reusability tests also demonstrate the robust nature of the catalyst.
2015
Gupta, S.; Patel, Nainesh Kantilal; Miotello, Antonio; Kothari, D. C.
Cobalt-Boride: An efficient and robust electrocatalyst for Hydrogen Evolution Reaction / Gupta, S.; Patel, Nainesh Kantilal; Miotello, Antonio; Kothari, D. C.. - In: JOURNAL OF POWER SOURCES. - ISSN 0378-7753. - STAMPA. - 279:(2015), pp. 620-625. [10.1016/j.jpowsour.2015.01.009]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11572/140645
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