Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/154575
Title: ZIF‐induced d‐band modification in a bimetallic nanocatalyst : achieving over 44 % efficiency in the ambient nitrogen reduction reaction
Authors: Sim, Howard Yi Fan
Chen, Jaslyn Ru Ting
Koh, Charlynn Sher Lin
Lee, Hiang Kwee
Han, Xuemei
Phan‐Quang, Gia Chuong
Pang, Jing Yi
Lay, Chee Leng
Pedireddy, Srikanth
Phang, In Yee
Yeow, Edwin Kok Lee
Ling, Xing Yi
Keywords: Science::Chemistry
Issue Date: 2020
Source: Sim, H. Y. F., Chen, J. R. T., Koh, C. S. L., Lee, H. K., Han, X., Phan‐Quang, G. C., Pang, J. Y., Lay, C. L., Pedireddy, S., Phang, I. Y., Yeow, E. K. L. & Ling, X. Y. (2020). ZIF‐induced d‐band modification in a bimetallic nanocatalyst : achieving over 44 % efficiency in the ambient nitrogen reduction reaction. Angewandte Chemie, 132(39), 17145-17151. https://dx.doi.org/10.1002/ange.202006071
Project: RG11/18
MOE2016-T2- 1-043
Journal: Angewandte Chemie
Abstract: The electrochemical nitrogen reduction reaction (NRR) offers a sustainable solution towards ammonia production but suffers poor reaction performance owing to preferential catalyst–H formation and the consequential hydrogen evolution reaction (HER). Now, the Pt/Au electrocatalyst d-band structure is electronically modified using zeolitic imidazole framework (ZIF) to achieve a Faradaic efficiency (FE) of > 44% with high ammonia yield rate of > 161 mgmgcat @1 h @1 under ambient conditions. The strategy lowers electrocatalyst d-band position to weaken H adsorption and concurrently creates electron-deficient sites to kinetically drive NRR by promoting catalyst–N2 interaction. The ZIF coating on the electrocatalyst doubles as a hydrophobic layer to suppress HER, further improving FE by > 44-fold compared to without ZIF (ca. 1%). The Pt/Au-NZIF interaction is key to enable strong N2 adsorption over H atom.
URI: https://hdl.handle.net/10356/154575
ISSN: 0044-8249
DOI: 10.1002/ange.202006071
Rights: © 2020 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim. All rights reserved.
Fulltext Permission: none
Fulltext Availability: No Fulltext
Appears in Collections:SPMS Journal Articles

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