Journal
DALTON TRANSACTIONS
Volume 48, Issue 15, Pages 4811-4822Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c8dt04660c
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Funding
- CNPq [459923/2014-5]
- Fundo de Apoio ao Ensino, a Pesquisa e a Extensao -Universidade Estadual de Campinas, FAEPEX-UNICAMP [2824/17, 2145/18]
- Fundacao de Amparo a Pesquisa do Estado de Sao Paulo, FAPESP [2013/22127-2, 2017/23960-0, 2018/03576-4]
- Coordenacao de Aperfeicoamento de Pessoal de Nivel Superior - Brasil (CAPES) [001]
- Fundacao de Amparo a Pesquisa do Estado de Sao Paulo (FAPESP) [18/03576-4, 17/23960-0] Funding Source: FAPESP
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The search for earth-abundant metal-based catalysts for the oxygen evolution reaction (OER) that operates under neutral conditions is a challenge in the field of sustainable energy. Many strategies have been used, and coordination polymers with structures similar to Prussian blue appear to be interesting electrocatalysts due to their efficiency, stability and tunable properties. In this paper, a novel catalyst produced from a cobalt-pentacyanidoferrate precursor is presented and applied in studies of the OER. This material showed a high surface active area and electrocatalytic activity comparable to traditional cobalt hexacyanidoferrate. According to the theoretical calculations, the improvement of these properties is an effect of the framework arrangement and it is not caused by changes of the electronic structure. Further experimental evidence is necessary to determine the active species. However, our results of spin densities obtained from DFT calculations suggest that the active species for water oxidation is the radical Fe(III)CN-Co(III)-O-center dot.
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