首页|Nanostructured Pt@RuOx catalyst for boosting overall acidic seawater splitting

Nanostructured Pt@RuOx catalyst for boosting overall acidic seawater splitting

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In the domain of acidic water splitting,designing bifunctional catalysts that marry high activity with enduring stability is a formidable challenge.Herein,we have constructed platinum-containing ruthenium oxide nano-particles(Pt@RuOx NPs)to achieve excellent overall water splitting performance in acidic electrolytes.Pt@RuOx NPs demonstrate exceptional catalytic activity for both the hydrogen evolution reaction(HER)and oxygen evolution reaction(OER)in acidic seawater,requiring overpotentials of only 20 and 157 mV,respectively to achieve a current density of 10 mA cm-2.Furthermore,in 0.5 M H2SO4,this catalyst exhibits high HER(19 mV)and OER(236 mV)catalytic activities.The two-electrode water splitting system composed of bifunctional Pt@RuOx NPs requires cell voltages of only 1.442 and 1.465 V to deliver a current density of 10 mA cm-2 in acidic seawater and 0.5 M H2SO4.Remarkably,this catalyst displays remarkable stability in the water splitting process.It is shown that the introduction of Pt could augment oxygen vacancies and enhance catalytic activity signifi-cantly.The synergy between Pt and Ru further contributes to the improved performance.Additionally,we have observed that acidic seawater holds distinct advantages for acidic water splitting,along with a thorough explo-ration of the relationship between Cl-concentration and catalytic performance.This study not only provides a strategy to improve the catalytic activity and stability of ruthenium-based catalysts for water splitting in acidic environments,but also unveils the promoting effect of Cl-on the catalytic activity in acidic water splitting.

Acidic water splittingBifunctional catalystsPt@RuOx nanoparticlesSynergistic effect

Zimo Peng、Quan Zhang、Gaocan Qi、Hao Zhang、Qian Liu、Guangzhi Hu、Jun Luo、Xijun Liu

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Institute for New Energy Materials & Low-Carbon Technologies,School of Materials Science and Engineering,Tianjin University of Technology,Tianjin,300384,China

School of Materials Science and Engineering,Tianjin University of Technology,Tianjin 300384,China

Institute for Advanced Study,Chengdu University,Chengdu,610106,China

Institute for Ecological Research and Pollution Control of Plateau Lakes,School of Ecology and Environmental Science,Yunnan University,Kunming,650091,China

ShenSi Lab,Shenzhen Institute for Advanced Study,University of Electronic Science and Technology of China,Longhua District,Shenzhen,518110,China

State Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite Structures,Guangxi Key Laboratory of Processing for Non-ferrous Metals and Featured Materials,MOE Key Laboratory of New Processing Technology for Nonferrous Metals and Materials,School of Resources,Environment and Materials,Guangxi University,Nanning,530004,China

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国家自然科学基金国家自然科学基金深圳市科技计划深圳市科技计划深圳市科技计划深圳市科技计划Guangdong Foundation for Basic and Applied Basic Research Program

5197115722075211JCYJ20210324115412035JCYJ20210324123202008JCYJ20210324122803009ZDSYS202108130955340012021A1515110880

2024

10.1016/j.cjsc.2023.100191

结构化学
中国化学会 中国科学院福建物质结构研究所

结构化学

影响因子：0.44
ISSN：0254-5861
年,卷(期)：2024.43(1)
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