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- Title
Electronic Regulation of Nickel Single Atoms by Confined Nickel Nanoparticles for Energy‐Efficient CO<sub>2</sub> Electroreduction.
- Authors
Ren, Wenhao; Tan, Xin; Jia, Chen; Krammer, Anna; Sun, Qian; Qu, Jiangtao; Smith, Sean C.; Schueler, Andreas; Hu, Xile; Zhao, Chuan
- Abstract
Modulating the electronic structure of atomically dispersed active sites is promising to boost catalytic activity but is challenging to achieve. Here we show a cooperative Ni single‐atom‐on‐nanoparticle catalyst (NiSA/NP) prepared via direct solid‐state pyrolysis, where Ni nanoparticles donate electrons to Ni(i)−N−C sites via a network of carbon nanotubes, achieving a high CO current density of 346 mA cm−2 at −0.5 V vs RHE in an alkaline flow cell. When coupled with a NiFe‐based anode in a zero‐gap membrane electrolyzer, the catalyst delivers an industrially relevant CO current density of 310 mA cm−2 at a low cell voltage of −2.3 V, corresponding to an overall energy efficiency of 57 %. The superior CO2 electroreduction performance is attributed to the enhanced adsorption of key intermediate COOH* on the electron‐rich Ni single atoms, as well as a high density of active sites.
- Subjects
ELECTROLYTIC reduction; ATOMS; NICKEL; CATALYTIC activity; NANOPARTICLES; ELECTROLYTIC cells; COBALT catalysts
- Publication
Angewandte Chemie, 2022, Vol 134, Issue 26, p1
- ISSN
0044-8249
- Publication type
Article
- DOI
10.1002/ange.202203335