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Atomic-level tuning of Co–N–C catalyst for high-performance electrochemical H2O2 production
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Atomic-level tuning of Co–N–C catalyst for high-performance electrochemical H2O2 production
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Journal Article
Atomic-level tuning of Co–N–C catalyst for high-performance electrochemical H2O2 production
2020
Overview
Despite the growing demand for hydrogen peroxide it is almost exclusively manufactured by the energy-intensive anthraquinone process. Alternatively, H
2
O
2
can be produced electrochemically via the two-electron oxygen reduction reaction, although the performance of the state-of-the-art electrocatalysts is insufficient to meet the demands for industrialization. Interestingly, guided by first-principles calculations, we found that the catalytic properties of the Co–N
4
moiety can be tailored by fine-tuning its surrounding atomic configuration to resemble the structure-dependent catalytic properties of metalloenzymes. Using this principle, we designed and synthesized a single-atom electrocatalyst that comprises an optimized Co–N
4
moiety incorporated in nitrogen-doped graphene for H
2
O
2
production and exhibits a kinetic current density of 2.8 mA cm
−2
(at 0.65 V versus the reversible hydrogen electrode) and a mass activity of 155 A g
−1
(at 0.65 V versus the reversible hydrogen electrode) with negligible activity loss over 110 hours.
Producing H
2
O
2
electrochemically currently use electrocatalysts that are insufficient to meet the demands for industrialization. A single-atom electrocatalyst with an optimized Co–N4 moiety incorporated in nitrogen-doped graphene is shown to exhibit enhanced performance for H
2
O
2
production.
Publisher
Nature Publishing Group UK,Nature Publishing Group
