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Coordination modulation of iridium single-atom catalyst maximizing water oxidation activity

Single-atom catalysts (SACs) have attracted tremendous research interests in various energy-related fields because of their high activity, selectivity and 100% atom utilization. However, it is still a challenge to enhance the intrinsic and specific activity of SACs. Herein, we present an approach to...

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Autores principales: Lei, Zhanwu, Cai, Wenbin, Rao, Yifei, Wang, Kuan, Jiang, Yuyuan, Liu, Yang, Jin, Xu, Li, Jianming, Lv, Zhengxing, Jiao, Shuhong, Zhang, Wenhua, Yan, Pengfei, Zhang, Shuo, Cao, Ruiguo
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8748886/
https://www.ncbi.nlm.nih.gov/pubmed/35013202
http://dx.doi.org/10.1038/s41467-021-27664-z
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author Lei, Zhanwu
Cai, Wenbin
Rao, Yifei
Wang, Kuan
Jiang, Yuyuan
Liu, Yang
Jin, Xu
Li, Jianming
Lv, Zhengxing
Jiao, Shuhong
Zhang, Wenhua
Yan, Pengfei
Zhang, Shuo
Cao, Ruiguo
author_facet Lei, Zhanwu
Cai, Wenbin
Rao, Yifei
Wang, Kuan
Jiang, Yuyuan
Liu, Yang
Jin, Xu
Li, Jianming
Lv, Zhengxing
Jiao, Shuhong
Zhang, Wenhua
Yan, Pengfei
Zhang, Shuo
Cao, Ruiguo
author_sort Lei, Zhanwu
collection PubMed
description Single-atom catalysts (SACs) have attracted tremendous research interests in various energy-related fields because of their high activity, selectivity and 100% atom utilization. However, it is still a challenge to enhance the intrinsic and specific activity of SACs. Herein, we present an approach to fabricate a high surface distribution density of iridium (Ir) SAC on nickel-iron sulfide nanosheet arrays substrate (Ir(1)/NFS), which delivers a high water oxidation activity. The Ir(1)/NFS catalyst offers a low overpotential of ~170 mV at a current density of 10 mA cm(−2) and a high turnover frequency of 9.85 s(−1) at an overpotential of 300 mV in 1.0 M KOH solution. At the same time, the Ir(1)/NFS catalyst exhibits a high stability performance, reaching a lifespan up to 350 hours at a current density of 100 mA cm(−2). First-principles calculations reveal that the electronic structures of Ir atoms are significantly regulated by the sulfide substrate, endowing an energetically favorable reaction pathway. This work represents a promising strategy to fabricate high surface distribution density single-atom catalysts with high activity and durability for electrochemical water splitting.
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spelling pubmed-87488862022-01-20 Coordination modulation of iridium single-atom catalyst maximizing water oxidation activity Lei, Zhanwu Cai, Wenbin Rao, Yifei Wang, Kuan Jiang, Yuyuan Liu, Yang Jin, Xu Li, Jianming Lv, Zhengxing Jiao, Shuhong Zhang, Wenhua Yan, Pengfei Zhang, Shuo Cao, Ruiguo Nat Commun Article Single-atom catalysts (SACs) have attracted tremendous research interests in various energy-related fields because of their high activity, selectivity and 100% atom utilization. However, it is still a challenge to enhance the intrinsic and specific activity of SACs. Herein, we present an approach to fabricate a high surface distribution density of iridium (Ir) SAC on nickel-iron sulfide nanosheet arrays substrate (Ir(1)/NFS), which delivers a high water oxidation activity. The Ir(1)/NFS catalyst offers a low overpotential of ~170 mV at a current density of 10 mA cm(−2) and a high turnover frequency of 9.85 s(−1) at an overpotential of 300 mV in 1.0 M KOH solution. At the same time, the Ir(1)/NFS catalyst exhibits a high stability performance, reaching a lifespan up to 350 hours at a current density of 100 mA cm(−2). First-principles calculations reveal that the electronic structures of Ir atoms are significantly regulated by the sulfide substrate, endowing an energetically favorable reaction pathway. This work represents a promising strategy to fabricate high surface distribution density single-atom catalysts with high activity and durability for electrochemical water splitting. Nature Publishing Group UK 2022-01-10 /pmc/articles/PMC8748886/ /pubmed/35013202 http://dx.doi.org/10.1038/s41467-021-27664-z Text en © The Author(s) 2022 https://creativecommons.org/licenses/by/4.0/Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) .
spellingShingle Article
Lei, Zhanwu
Cai, Wenbin
Rao, Yifei
Wang, Kuan
Jiang, Yuyuan
Liu, Yang
Jin, Xu
Li, Jianming
Lv, Zhengxing
Jiao, Shuhong
Zhang, Wenhua
Yan, Pengfei
Zhang, Shuo
Cao, Ruiguo
Coordination modulation of iridium single-atom catalyst maximizing water oxidation activity
title Coordination modulation of iridium single-atom catalyst maximizing water oxidation activity
title_full Coordination modulation of iridium single-atom catalyst maximizing water oxidation activity
title_fullStr Coordination modulation of iridium single-atom catalyst maximizing water oxidation activity
title_full_unstemmed Coordination modulation of iridium single-atom catalyst maximizing water oxidation activity
title_short Coordination modulation of iridium single-atom catalyst maximizing water oxidation activity
title_sort coordination modulation of iridium single-atom catalyst maximizing water oxidation activity
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8748886/
https://www.ncbi.nlm.nih.gov/pubmed/35013202
http://dx.doi.org/10.1038/s41467-021-27664-z
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