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- Title
NiSn Atomic Pair on an Integrated Electrode for Synergistic Electrocatalytic CO<sub>2</sub> Reduction.
- Authors
Xie, Wenfu; Li, Hao; Cui, Guoqing; Li, Jianbo; Song, Yuke; Li, Shijin; Zhang, Xin; Lee, Jin Yong; Shao, Mingfei; Wei, Min
- Abstract
The development of efficient electrocatalysts for the CO2 reduction reaction (CO2RR) remains a challenge. Demonstrated here is a NiSn atomic‐pair electrocatalyst (NiSn‐APC) on a hierarchical integrated electrode, which exhibits a synergistic effect in simultaneously promoting the activity and selectivity of the CO2RR to formate. The NiSn atomic pair consists of adjacent Ni and Sn, each coordinated with four nitrogen atoms (N4‐Ni‐Sn‐N4). The as‐prepared NiSn‐APC displays exceptional activity for the CO2RR to formate with a turnover frequency of 4752 h−1, a formate productivity of 36.7 mol h−1 gSn−1 and an utilization degree of active sites (57.9 %), which are superior to previously reported single‐atomic catalysts. Both experimental data and density‐functional theory calculations verify the electron redistribution of Sn imposed by adjacent Ni, which reduces the energy barrier of the *OCHO intermediate and makes this potential‐determining step thermodynamically spontaneous. This synergistic catalysis provides a successful paradigm for rational design and preparation of atomic‐pair electrocatalysts with enhanced performance.
- Subjects
ELECTROCATALYSTS; ACTIVATION energy; CARBON dioxide fixation; ELECTRODES; CATALYSIS; HETEROGENEOUS catalysis
- Publication
Angewandte Chemie, 2021, Vol 133, Issue 13, p7458
- ISSN
0044-8249
- Publication type
Article
- DOI
10.1002/ange.202014655