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- Title
Atomically Dispersed Nickel(I) on an Alloy‐Encapsulated Nitrogen‐Doped Carbon Nanotube Array for High‐Performance Electrochemical CO<sub>2</sub> Reduction Reaction.
- Authors
Zhang, Tianyu; Han, Xu; Yang, Hongbin; Han, Aijuan; Hu, Enyuan; Li, Yaping; Yang, Xiao‐qing; Wang, Lei; Liu, Junfeng; Liu, Bin
- Abstract
Single‐atom catalysts (SACs) show great promise for electrochemical CO2 reduction reaction (CRR), but the low density of active sites and the poor electrical conduction and mass transport of the single‐atom electrode greatly limit their performance. Herein, we prepared a nickel single‐atom electrode consisting of isolated, high‐density and low‐valent nickel(I) sites anchored on a self‐standing N‐doped carbon nanotube array with nickel–copper alloy encapsulation on a carbon‐fiber paper. The combination of single‐atom nickel(I) sites and self‐standing array structure gives rise to an excellent electrocatalytic CO2 reduction performance. The introduction of copper tunes the d‐band electron configuration and enhances the adsorption of hydrogen, which impedes the hydrogen evolution reaction. The single‐nickel‐atom electrode exhibits a specific current density of −32.87 mA cm−2 and turnover frequency of 1962 h−1 at a mild overpotential of 620 mV for CO formation with 97 % Faradic efficiency.
- Subjects
HYDROGEN evolution reactions; NICKEL; ELECTROLYTIC reduction; ELECTRON configuration; NICKEL electrodes; DISPERSING agents; CARBON dioxide reduction
- Publication
Angewandte Chemie, 2020, Vol 132, Issue 29, p12153
- ISSN
0044-8249
- Publication type
Article
- DOI
10.1002/ange.202002984