Metal dicyanamides as efficient and robust water-oxidation catalysts

Limited Access
This item is unavailable until:
2018-01-23
Date
2017
Authors
Nune, S. V. K.
Basaran, A. T.
Ülker, E.
Mishra, R.
Karadas, F.
Editor(s)
Advisor
Supervisor
Co-Advisor
Co-Supervisor
Instructor
Source Title
ChemCatChem
Print ISSN
1867-3880
Electronic ISSN
1867-3899
Publisher
Wiley Blackwell
Volume
9
Issue
2
Pages
300 - 307
Language
English
Journal Title
Journal ISSN
Volume Title
Series
Abstract

Non-oxide cobalt-based water-oxidation electrocatalysts have received attention recently for their relative ease of preparation, they are stable both in acidic and basic media, and they have higher turnover frequencies than cobalt oxides. Recent studies show that one of the main bottlenecks in the implementation of non-oxide systems to water splitting is the low number of active metal sites, which is in the order of nmol cm−2. Herein, a new series of non-oxide water-oxidation catalysts has been introduced to the field. Cobalt dicyanamides are observed to have around four times higher surface active sites and better catalytic performances than cyanide-based systems. Long-term catalytic studies (70 h) at an applied potential of 1.2 V and electrochemical studies performed in solutions in pH values of 3.0–12.0 indicate that the compounds are robust and retain their structures even under harsh conditions. Moreover, the addition of Ni impurities to cobalt dicyanamides is a feasible method to improve their catalytic activities.

Course
Other identifiers
Book Title
Citation
Published Version (Please cite this version)