RIS ID

137938

Publication Details

Lai, W., Zhang, L., Hua, W., Indris, S., Yan, Z., Hu, Z., Zhang, B., Liu, Y., Wang, L., Liu, M., Liu, R., Wang, Y., Wang, J., Hu, Z., Liu, H., Chou, S. & Dou, S. (2019). General p-Electron-Assisted Strategy for Ir, Pt, Ru, Pd, Fe, Ni Single- Atom Electrocatalysts with Bifunctional Active Sites for Highly Efficient Water Splitting. Angewandte Chemie-international Edition, 58 (34), 11868-11873.

Abstract

Both the hydrogen evolution reaction (HER) and the oxygen evolution reaction (OER) are crucial to water splitting, but require alternative active sites. Now, a general pelectron- assisted strategy to anchor single-atom sites (M=Ir, Pt, Ru, Pd, Fe, Ni) on a heterogeneous support is reported. The Matoms can simultaneously anchor on two distinct domains of the hybrid support, four-fold N/C atoms (M@NC), and centers of Co octahedra (M@Co), which are expected to serve as bifunctional electrocatalysts towards the HER and the OER. The Ir catalyst exhibits the best water-splitting performance, showing a low applied potential of 1.603V to achieve 10 mAcm@2 in 1.0m KOH solution with cycling over 5 h. DFT calculations indicate that the Ir@Co (Ir) sites can accelerate the OER, while the Ir@NC3 sites are responsible for the enhanced HER, clarifying the unprecedented performance of this bifunctional catalyst towards full water splitting.

Grant Number

ARC/LP120200432, ARC/DE170100928, ARC/LE0237478

Available for download on Friday, July 10, 2020

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