Bibliographic Details
| Title: |
Enhancing Electrocatalytic Production of H2O2by Modulating Coordination Environment of Cobalt Center |
| Authors: |
Wu, Guoling, Yang, Zhongjie, Zhang, Tianlin, Sun, Yali, Long, Chang, Song, Yaru, Lei, Shengbin, Tang, Zhiyong |
| Source: |
Bulletin of the Korean Chemical Society; August 2021, Vol. 42 Issue: 8 p1155-1160, 6p |
| Abstract: |
As an environmentally friendly oxidant, H2O2is widely utilized in various fields; however, its production methods remain limited to the chemical anthraquinone process. Alternatively, electrocatalytic oxygen reduction possesses numerous notable advantages (e.g., cost‐effectiveness, small‐scale, and distributed nature). As electrocatalytic oxygen reduction has been widely investigated in the fields of fuel cells and metal‐air batteries, the mechanism of the 2e−‐ORR pathway for producing H2O2is not sufficiently clear. Herein, we explore the effect of the cobalt (Co) coordination environment on the electrochemical production of H2O2. The detailed investigation on N‐, P‐, and S‐coordinated Co catalysts (Co1N1N3, Co1P1N3, and Co1S1N3) demonstrates that changing the coordination environment evidently affects the H2O2selectivity, and the S‐coordinated Co exhibits the best catalytic performance. This finding would lead to the design and selection of catalysts at atomic level for producing H2O2via electrocatalytic oxygen reduction. By rationally modulating the coordination environment of the metal active center, the performance of the ORR catalyst is effectively tuned. The electrochemical tests and the chemical quantification of H2O2demonstrate that Co1S1N3possesses the best catalytic performance at 0.2 V, which is highly sensitive to the applied voltage. |
| Database: |
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