Author(s) Huang, X.
Journal Angew Chem Int Ed Engl
Date Published 2020 Feb 19

Surface regulation has been proven to be an effective strategy to improve the performance of catalysts, but it has been rarely demonstrated for nitrogen reduction reaction (NRR) up to date. Herein, we have selectively created surface-rough Rh 2 Sb nanorod (RNR) and surface-smooth Rh 2 Sb NR (SNR), and investigated their performance for NRR. We found that the high-index-facet bounded Rh 2 Sb RNRs/C exhibit a high NH 3 yield rate of 228.85 ± 12.96 µg h -1 mg -1 Rh at -0.45 V versus reversible hydrogen electrode (RHE), outperforming the Rh 2 Sb SNRs/C (63.07 ± 4.45 µg h -1 mg -1 Rh ) and Rh nanoparticles/C (22.82 ± 1.49 µg h -1 mg -1 Rh ), due to the enhanced adsorption and activation of N 2 on high-index facets. Rh 2 Sb RNRs/C also show durable stability with negligible activity decay after 10 h of successive electrolysis. The present work demonstrates that surface regulation plays an important role in promoting NRR activity and provides a new strategy for creating efficient NRR electrocatalysts.

DOI 10.1002/anie.201915747
ISSN 1521-3773
Citation Angew Chem Int Ed Engl. 2020.

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