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165. Ultrafine PdMo alloy nanowires mitigate excessive oxygen adsorption to enhance oxygen reduction in Zn-air batteries, J Colloid Interf Sci.
2025-04-27 11:10  

Huaifang Teng1, Songliang Liu1*, Dalin Xu1, Cong Zhang1, Guangshuo Li1, Meixiang Zheng1, Xuejing Cui1, Xin Chen2*, and Luhua Jiang1*

1 Electrocatalysis & Nanomaterial Laboratory, College of Materials Science and Engineering, Qingdao University of Science and Technology, Qingdao 266042, China.

2 State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu 610500, China.

*Corresponding authors:

*E-mail: liusongliang@qust.edu.cn, chenxin830107@pku.edu.cn, luhuajiang@qust.edu.cn

Abstract

Palladium (Pd) is one of the most promising catalysts for oxygen reduction reaction (ORR), however its activity is limited by the excessively strong adsorption of oxygen-containing intermediates. Herein, a one-dimensional (1D) ultrafine PdMo alloy nanowire (PdMo NWs) is synthesized, which exhibits excellent ORR activity and stability in both half cells and zinc-air batteries. The mass activity (1.08 mA·μ) and specific activity (1.74 mA·cm−2) of PdMo NWs are 9.2 and 6.9 times higher than that of a commercial nanosized Pt/C, respectively. Especially, the zinc-air battery with the PdMo NWs cathode achieves a peak power density of 214.8 mW cm−2, and remains stable in a 160 h durability test. DFT calculations and in-situ electrochemical Fourier-transform infrared spectroscopy characterization reveal that the introduction of Mo significantly downshifts the d-band center of Pd, inhibiting excessive adsorption of the oxygen intermediates, thereby accelerating the ORR processes. This work demonstrates a 1D ultrafine Pd-based alloy nanowire as an effective and robust electrocatalyst for the ORR, and provides direct spectroscopic evidence for alleviated adsorption of oxygen intermediates on PdMo surfaces.

Keywords: PdMo alloy, nanowires, electrocatalysis, oxygen reduction reaction, zinc-air batteries



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姜鲁华 教授
中科院百人

泰山学者特聘教授

德国洪堡学者

     能源短缺和环境污染是当今世界面临的两大难题,研究团队围绕洁净高效新型电能源技术,聚焦电能源相关的纳米材料和电催化应用基础研究。团队已发表SCI收录论文近200篇,申请发明专利80余件。纳米材料与电催化团队负责人姜鲁华教授连续多年入选Elsevier 能源领域/材料领域“中国高被引学者”和“全球前2%顶尖科学家”榜单。主持科技部、国家基金委、山东省科技厅等省部级以上项目20余项。研究成果曾获国家自然科学二等奖、辽宁省自然科学一等奖、国防技术发明二等奖、大连市技术发明一等奖、山东省自然科学学术创新奖等多个奖项。团队教师兼任 Chemical Engineering JournalNano Materials ScineceJournal of Electrochemistry 等多个期刊的编委/编辑。团队多名研究生获得国家奖学金和各类奖助学金以及研究生创新研究计划支持,培养的本科生多人获得大学生创新研究计划支持。

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