Electronic and Architecture Engineering of Hammer-Shaped Ir-NiMoO4-ZIF for Effective Oxygen Evolution

Abstract

Modish designation of electronic structure and architecture with appropriate binding strength with oxygen-involved intermediates and abundant active sites is of paramount significance for boosting oxygen evolution reaction (OER), yet still challenging. Herein, an innovative hammer-shaped structure has been well developed by in-situ assembling the ZIF-67 nanocubes on the surface of one-dimensional (1D) NiMoO4 nanorods. After doping with ultralow Ir, the NiMoO4-ZIF hammers are demonstrated to be highly active OER, delivering an ultralow overpotential of 235 mV at 10 mA cm-2. On the basis of X-ray photoelectron spectroscopy and surface valence band spectra, it is revealed that the ultralow Ir doping can effectively modify the electronic structure of metal center, leading to the optimization of binding strength for O* and OOH*. Moreover, hammer-like architecture and intimate interface between NiMoO4 and in-situ formed CoOOH also contribute to the substantial improvement in OER performance. This work manifests the significance of electronic and architecture engineering strategy for the improvement of electrocatalytic performance and presents an advanced OER electrocatalyst.

Supplementary files

Article information

Article type
Paper
Submitted
06 Jul 2022
Accepted
05 Aug 2022
First published
05 Aug 2022

CrystEngComm, 2022, Accepted Manuscript

Electronic and Architecture Engineering of Hammer-Shaped Ir-NiMoO4-ZIF for Effective Oxygen Evolution

M. Song, X. Lu, M. Du, Z. Chen, C. Zhu, H. Xu, W. Cheng, W. Zhuang, Z. Li and L. Tian, CrystEngComm, 2022, Accepted Manuscript , DOI: 10.1039/D2CE00924B

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