Non-noble metal graphene oxide-copper (II) ions hybrid electrodes for electrocatalytic hydrogen evolution reaction

Type
Article

Authors
Muralikrishna, S.
Ravishankar, T.N.
Ramakrishnappa, T.
Nagaraju, Doddahalli H.
Krishna Pai, Ranjith

KAUST Department
Physical Science and Engineering (PSE) Division

Online Publication Date
2015-08-25

Print Publication Date
2016-03-04

Date
2015-08-25

Abstract
Non-noble metal and inexpensive graphene oxide-copper (II) ions (GO-Cu2+) hybrid catalysts have been explored for the hydrogen evolution reaction (HER). We were able to tune the binding abilities of GO toward the Cu2+ ions and hence their catalytic properties by altering the pH. We have utilized the oxygen functional moieties such as carboxylate, epoxide, and hydroxyl groups on the edge and basal planes of the GO for binding the Cu2+ ions through dative bonds. The GO-Cu2+ hybrid materials were characterized by cyclic voltammetry in sodium acetate buffer solution. The morphology of the hybrid GO-Cu2+ was characterized by atomic force microscopy. The GO-Cu2+ hybrid electrodes show good electrocatalytic activity for HER with low overpotential in acidic solution. The Tafel slope for the GO-Cu2+ hybrid electrode implies that the primary discharge step is the rate determining step and HER proceed with Volmer step. © 2015 American Institute of Chemical Engineers Environ Prog.

Citation
Muralikrishna S, Ravishankar TN, Ramakrishnappa T, Nagaraju DH, Krishna Pai R (2015) Non-noble metal graphene oxide-copper (II) ions hybrid electrodes for electrocatalytic hydrogen evolution reaction. Environmental Progress & Sustainable Energy 35: 565–573. Available: http://dx.doi.org/10.1002/ep.12238.

Acknowledgements
S. Muralikrishna thanks Jain University for financial support and Rajesh Chalasani, IPC, IISc, Bangalore for the schematic diagrams.

Publisher
Wiley

Journal
Environmental Progress & Sustainable Energy

DOI
10.1002/ep.12238

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