A RuCoBO Nanocomposite for Highly Efficient and Stable Electrocatalytic Seawater Splitting

Xiao Yu Yang; Le Wei Shen; Yong Wang; Jiang Bo Chen; Ge Tian; Kang Yi Xiong; Christoph Janiak; David Cahen

doi:10.1021/acs.nanolett.2c04668

A RuCoBO Nanocomposite for Highly Efficient and Stable Electrocatalytic Seawater Splitting

Xiao Yu Yang
, Le Wei Shen
, Yong Wang
, Jiang Bo Chen
, Ge Tian
, Kang Yi Xiong
, Christoph Janiak
, David Cahen

Department of Chemistry

Research output: Contribution to journal › Article › peer-review

45 Scopus citations

Abstract

Efficient and stable electrocatalysts are critically needed for the development of practical overall seawater splitting. The nanocomposite of RuCoBO has been rationally engineered to be an electrocatalyst that fits these criteria. The study has shown that a calcinated RuCoBO-based nanocomposite (Ru2Co1BO-350) exhibits an extremely high catalytic activity for H2 and O2 production in alkaline seawater (overpotentials of 14 mV for H2 evolution and 219 mV for O2 evolution) as well as a record low cell voltage (1.466 V@10 mA cm-2) and long-term stability (230 h @50 mA cm-2 and @100 mA cm-2) for seawater splitting. The results show that surface reconstruction of Ru2Co1BO-350 occurs during hydrogen evolution reaction and oxygen evolution reaction, which leads to the high activity and stability of the catalyst. The reconstructed surface is highly resistant to Cl- corrosion. The investigation suggests that a new strategy exists for the design of high-performance Ru-based electrocatalysts that resist anodic corrosion during seawater splitting.

Original language	English
Pages (from-to)	1052-1060
Number of pages	9
Journal	Nano Letters
Volume	23
Issue number	3
DOIs	https://doi.org/10.1021/acs.nanolett.2c04668
State	Published - 8 Feb 2023

Bibliographical note

Publisher Copyright:
© 2023 American Chemical Society.

Funding

This study was supported by National Key Research and Development Program of China (2022YFB3805600, 2022YFB3805604, 2022YFB3806800), National Natural Science Foundation of China (22293020), National 111 project (B20002), PCSIRT (IRT_15R52), Program Fund of Non-Metallic Excellence and Innovation Center for Building Materials (2023TDA1-1), Sino-German Center COVID-19 Related Bilateral Collaborative Project (C-0046), Guangdong Basic and Applied Basic Research Foundation (2022A1515010137, 2022A1515010504), Shenzhen Science and Technology Program (JCYJ20210324142010029, GJHZ20210705143204014, KCXFZ20211020170006010). We thank the Nanostructure Research Centre (NRC) for performing the S/TEM imaging.

Funders	Funder number
Non-Metallic Excellence and Innovation Center for Building Materials	2023TDA1-1
PCSIRT	IRT_15R52
Sino-German Center COVID-19 Related Bilateral Collaborative Project	C-0046
National Natural Science Foundation of China	22293020
Science, Technology and Innovation Commission of Shenzhen Municipality	JCYJ20210324142010029, GJHZ20210705143204014, KCXFZ20211020170006010
National Key Research and Development Program of China	2022YFB3806800, 2022YFB3805600, 2022YFB3805604
Higher Education Discipline Innovation Project	B20002
Basic and Applied Basic Research Foundation of Guangdong Province	2022A1515010137, 2022A1515010504

Keywords

Ru-based electrocatalysts
directed transformation
electrocatalytic seawater splitting
multifunctional sites
surface reconstruction

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10.1021/acs.nanolett.2c04668

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abstract = "Efficient and stable electrocatalysts are critically needed for the development of practical overall seawater splitting. The nanocomposite of RuCoBO has been rationally engineered to be an electrocatalyst that fits these criteria. The study has shown that a calcinated RuCoBO-based nanocomposite (Ru2Co1BO-350) exhibits an extremely high catalytic activity for H2 and O2 production in alkaline seawater (overpotentials of 14 mV for H2 evolution and 219 mV for O2 evolution) as well as a record low cell voltage (1.466 V@10 mA cm-2) and long-term stability (230 h @50 mA cm-2 and @100 mA cm-2) for seawater splitting. The results show that surface reconstruction of Ru2Co1BO-350 occurs during hydrogen evolution reaction and oxygen evolution reaction, which leads to the high activity and stability of the catalyst. The reconstructed surface is highly resistant to Cl- corrosion. The investigation suggests that a new strategy exists for the design of high-performance Ru-based electrocatalysts that resist anodic corrosion during seawater splitting.",

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AB - Efficient and stable electrocatalysts are critically needed for the development of practical overall seawater splitting. The nanocomposite of RuCoBO has been rationally engineered to be an electrocatalyst that fits these criteria. The study has shown that a calcinated RuCoBO-based nanocomposite (Ru2Co1BO-350) exhibits an extremely high catalytic activity for H2 and O2 production in alkaline seawater (overpotentials of 14 mV for H2 evolution and 219 mV for O2 evolution) as well as a record low cell voltage (1.466 V@10 mA cm-2) and long-term stability (230 h @50 mA cm-2 and @100 mA cm-2) for seawater splitting. The results show that surface reconstruction of Ru2Co1BO-350 occurs during hydrogen evolution reaction and oxygen evolution reaction, which leads to the high activity and stability of the catalyst. The reconstructed surface is highly resistant to Cl- corrosion. The investigation suggests that a new strategy exists for the design of high-performance Ru-based electrocatalysts that resist anodic corrosion during seawater splitting.

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A RuCoBO Nanocomposite for Highly Efficient and Stable Electrocatalytic Seawater Splitting

Abstract

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Keywords

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