In-situ plasmonic tracking oxygen evolution reveals multistage oxygen diffusion and accumulating inhibition.

Jun-Gang Wang, Lifang Shi, Yingying Su, Liwei Liu, Zhenzhong Yang, Rong Huang, Jing Xie, Yang Tian, Di Li

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Article in Nature communications, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.

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9 authors.

Jun-Gang WangSchool of Chemistry and Molecular Engineering, East China Normal University, Shanghai, 200241, China.

Lifang ShiInstitute of Optics and Electronics, Chinese Academy of Sciences, Chengdu, 610209, China.

Yingying SuSchool of Chemistry and Molecular Engineering, East China Normal University, Shanghai, 200241, China.

Liwei LiuInstitute of Optics and Electronics, Chinese Academy of Sciences, Chengdu, 610209, China.

Zhenzhong YangKey Laboratory of Polar Materials and Devices (MOE), Department of Electronics, East China Normal University, Shanghai, 200241, China.

Rong HuangKey Laboratory of Polar Materials and Devices (MOE), Department of Electronics, East China Normal University, Shanghai, 200241, China.

Jing XieInstitute of Microelectronics, Chinese Academy of Sciences, Beijing, 100029, China.

Yang TianSchool of Chemistry and Molecular Engineering, East China Normal University, Shanghai, 200241, China.

Di LiSchool of Chemistry and Molecular Engineering, East China Normal University, Shanghai, 200241, China. dli@chem.ecnu.edu.cn.ORCID 0000-0003-1674-0110

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Understanding mass transfer processes concomitant with electrochemical conversion for gas evolution reactions at the electrode-electrolyte interface plays a key role in advancing renewable energy storage and conversion. However, due to the complicated diffusion behavior of gas at the dynamic catalytic interfaces, it is still a great challenge to accurately portray mass transfer of gas during electrocatalysis process. Here, we track the diffusion of dissolved oxygen on Cu nanostructured plasmonic interface, which reveals multistage oxygen diffusion behaviors, including premature oxygen accumulation, spontaneous diffusion and accelerated oxygen dissipation. This work uncovers an accumulating inhibition effect on oxygen evolution arising from interfacial dissolved oxygen. With these knowledges, we develop a programmable potential scan strategy to eliminate interfacial gas products, which alleviates the concentration polarization, releases accessible actives sites and promotes electrocatalytic performance. Our findings provide a direct observation of the interfacial mass transfer processes that governs the kinetics of gas-involved multiphases catalysis.

Identifiers

PMID33846310

DOI10.1038/s41467-021-22434-3

PMCPMC8041856

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