Boric Acid-Assisted Pyrolysis for High-Loading Single-Atom Catalysts to Boost Oxygen Reduction Reaction in Zn-Air Batteries

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外文摘要：The emerging of single-atom catalysts(SACs)offers a great opportunity for the development of advanced energy storage and conversion devices due to their excellent activity and durability,but the actual mass production of high-loading SACs is still challenging.Herein,a facile and green boron acid(H3BO3)-assisted pyrolysis strategy is put forward to synthesize SACs by only using chitosan,cobalt salt and H3BO3 as precursor,and the effect of H3BO3 is deeply investigated.The results show that molten boron oxide derived from H3BO3 as ideal high-temperature carbonization media and blocking media play important role in the synthesis process.As a result,the acquired Co/N/B tri-doped porous carbon framework(Co-N-B-C)not only presents hierarchical porous structure,large specific surface area and abundant carbon edges but also possesses high-loading single Co atom(4.2 wt.％),thus giving rise to outstanding oxygen catalytic performance.When employed as a catalyst for air cathode in Zn-air batteries,the resultant Co-N-B-C catalyst shows remarkable power density and long-term stability.Clearly,our work gains deep insight into the role of H3BO3 and provides a new avenue to synthesis of high-performance SACs.

外文关键词：

boric acidoxygen reduction reactionsingle-atom catalystsZn-air batteries

作者：

Chenxi Xu、Jiexing Wu、Liang Chen、Yi Gong、Boyang Mao、Jincan Zhang、Jinhai Deng、Mingxuan Mao、Yan Shi、Zhaohui Hou、Mengxue Cao、Huanxin Li、Haihui Zhou、Zhongyuan Huang、Yafei Kuang

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作者单位：

State Key Laboratory for Chemo/Biosensing and Chemometrics and College of Chemistry and Chemical Engineering,Hunan University,Changsha 410082,China

School of Chemistry and Chemical Engineering,Key Laboratory of Hunan Province for Advanced Carbon-based Functional Materials,Hunan Institute of Science and Technology,Yueyang 414006,China

Advanced Technology Institute,University of Surrey,Guildford Surrey GU27XH,UK

Department of Engineering,University of Cambridge,9 JJ Thomson Avenue,Cambridge CB3 0FA,UK

King's College London,London SE1 1UL,UK

Department of Electrical and Electronic Engineering,Imperial College London,London SW7 2AZ,UK

College of Materials and Metallurgy,Guizhou University,Guiyang 550025,China

Department of Chemistry,Physical & Theoretical Chemistry Laboratory,University of Oxford,South Parks Road,Oxford OX1 3QZ,UK

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基金：

National Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaChina Postdoctoral Science FoundationInternational Postdoctoral Exchange Fellowship ProgramScience & Technology innovation program of Hunan provinceScience & Technology innovation program of Hunan provinceHunan Provincial Natural Science Foundation of ChinaScience & Technology talents lifting project of Hunan ProvinceScientific Research Fund of Hunan Provincial Education Department

项目编号：

522742985197411451672075219080492020M682560PC20220202020RC20242022RC30372020JJ41752022TJ-N1621A0392

出版年：

2024

DOI：

10.1002/eem2.12569

能源与环境材料(英文)

ISSN：

年,卷(期)：2024.7(2)