4.8 Article

Cobalt-Based Particles Formed upon Electrocatalytic Hydrogen Production by a Cobalt Pyridine Oxime Complex

Journal

CHEMSUSCHEM
Volume 6, Issue 12, Pages 2226-2230

Publisher

WILEY-V C H VERLAG GMBH
DOI: 10.1002/cssc.201300564

Keywords

cobalt; electrocatalysis; homogeneous catalysis; hydrogen; oximes

Funding

  1. CNRS [H2]
  2. ANR TechbBioPhyp
  3. LABEX CHARMMMAT

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An open-coordination-sphere cobalt(III) oximato-based complex was designed as a putative catalyst for the hydrogen evolution reaction (HER). Electrochemical alteration in the presence of acid occurs, leading to the formation of cobalt-based particles that act as an efficient catalyst for HER at pH 7. The exact chemical nature of these particles is yet to be determined. This study thus raises interesting issues regarding the fate of molecular-based complexes designed for the HER, and points to the challenging task of identifying the real catalytic species. Moreover, understanding and rationalizing the alteration pathways can be seen as a new route to reach catalytic particulates.

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