A post-modification strategy to precisely construct dual-atom sites for oxygen reduction electrocatalysis

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外文摘要：Dual-atom catalysts(DACs)afford promising potential for oxygen reduction electrocatalysis due to their high atomic efficiency and high intrinsic activity.However,precise construction of dual-atom sites remains a challenge.In this work,a post-modification strategy is proposed to precisely fabricate DACs for oxygen reduction electrocatalysis.Concretely,a secondary metal precursor is introduced to the pri-mary single-atom sites to introduce direct metal-metal interaction,which ensures the formation of desired atom pair structure during the subsequent pyrolysis process and allows for successful construc-tion of DACs.The as-prepared FeCo-NC DAC exhibits superior oxygen reduction electrocatalytic activity with a half-wave potential of 0.91 V vs.reversible hydrogen electrode.Zn-air batteries equipped with the FeCo-NC DAC demonstrate higher peak power density than those with the Pt/C benchmark.More impor-tantly,this post-modification strategy is demonstrated universal to achieve a variety of dual-atom sites.This work presents an effective synthesis methodology for precise construction of catalytic materials and propels their applications in energy-related devices.

外文关键词：

Dual-atom catalystsElectrocatalysisOxygen reduction reactionPost-modificationZinc-air batteries

作者：

Juan Wang、Xinyan Liu、Chang-Xin Zhao、Yun-Wei Song、Jia-Ning Liu、Xi-Yao Li、Chen-Xi Bi、Xin Wan、Jianglan Shui、Hong-Jie Peng、Bo-Quan Li、Jia-Qi Huang

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作者单位：

School of Materials Science and Engineering,Beijing Institute of Technology,Beijing 100081,China

Advanced Research Institute of Multidisciplinary Science,Beijing Institute of Technology,Beijing 100081,China

Institute of Fundamental and Frontier Sciences,University of Electronic Science and Technology of China,Chengdu 611731,Sichuan,China

Beijing Key Laboratory of Green Chemical Reaction Engineering and Technology,Department of Chemical Engineering,Tsinghua University,Beijing 100084,China

School of Materials Science and Engineering,Beihang University,Beijing 100191,China

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基金：

国家自然科学基金国家自然科学基金Beijing Institute of Technology Research Fund Program for Young ScholarsTsinghua University Initiative Scientific Research Program

项目编号：

2227900822109082

出版年：

2024

DOI：

10.1016/j.jechem.2023.11.037

能源化学

中国科学院大连化学物理研究所中国科学院成都有机化学研究所

能源化学

CSTPCDEI

影响因子：0.654

ISSN：2095-4956

年,卷(期)：2024.90(3)

参考文献量58