We found a match
Your institution may have rights to this item. Sign in to continue.
- Title
A Nickel(II) Complex as a Homogeneous Electrocatalyst for Water Oxidation at Neutral pH: Dual Role of HPO<sub>4</sub><sup>2−</sup> in Catalysis.
- Authors
Wang, Jia ‐ Wei; Zhang, Xiang ‐ Qiong; Huang, Hai ‐ Hua; Lu, Tong ‐ Bu
- Abstract
A new mononuclear nickel complex, featuring two cis-relative labile sites, is reported as a homogeneous electrocatalyst for water oxidation in a neutral phosphate buffer. The water oxidation catalysis can be initiated at a moderate overpotential of approximately 0.48 V. Mechanistic studies reveal that the oxidation of water by a two-electron oxidized species of the nickel catalyst is feasible, with formation of a peroxide intermediate through intramolecular O−O coupling. Interestingly, it has been found that the buffer base (HPO42−) plays a dual role in the catalytic system: it acts as a proton acceptor to expedite proton-coupled electron transfer (PCET) during catalysis, but it also suppresses the electrocatalysis through an anation process.
- Subjects
NICKEL compounds; METAL complexes; ELECTROCATALYSTS; OXIDATION of water; CHARGE exchange; PROTONS
- Publication
ChemCatChem, 2016, Vol 8, Issue 20, p3287
- ISSN
1867-3880
- Publication type
Article
- DOI
10.1002/cctc.201600796