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119. Engineering of Unique Ni-Ru Nano-Twins for Highly Active and Robust Bifunctional Hydrogen Oxidation and Hydrogen Evolution Electrocatalysis, Chem Eng J., 2023, 454, 139959
2022-10-14 10:19  

Jing Liu a, Jie Wang a, Yumeng Fo b, Boyang Zhang a, Costas Molochas d, Jie Gao a,

Wenzhen Li c, Xuejing Cui a, Xin Zhou*b, Luhua Jiang*a, Panagiotis Tsiakaras*d

a College of Materials Science and Engineering, Qingdao University of Science and Technology,

Qingdao, Shandong 266042, China.

b College of Environment and Chemical Engineering, Dalian University, Dalian, 116622, China.

c Department of Chemical & Biological Engineering, Iowa State University, Ames, IA 50011-1098, United States.

d Laboratory of Alternative Energy Conversion Systems, Department of Mechanical Engineering,

School of Engineering, University of Thessaly, Pedion Areos 38834, Greece.

ABSTRACT: Herein, unique Ni-Ru nano-twins (Ni1Ru1/C) are reported for the first time as a superior bifunctional catalyst for hydrogen oxidation/hydrogen evolution reaction (HOR/HER). Compared to Pt/C, the Ni1Ru1/C nano-twins display a remarkable HOR activity with a comparable mass activity of 0.12Amg-1metal and superior HER activity, with an overpotential (դ) of only 16mV for achieving a cathodic HER current of 10mAcm-2, together with a high turnover-frequency of 1.88s-1 (@դ=30mV). Additionally, the HOR limiting current of the Ni1Ru1/C nano-twins can be maintained up to a break-down potential of 0.25VRHE, demonstrating excellent electrochemical stability. Experimental and theoretical studies reveal that the electron re-distribution at the Ni/Ru interface of Ni-Ru nano-twins optimizes the binding energy of the adsorbed hydrogen (Had) and the adsorbed hydroxyl (OHad) intermediates, allowing the HOR/HER to proceed via a low energy barrier. This work provides a strategy to synthesize hetero-metal nano-twins as promising multi-functional catalysts and highlights the critical role of interfaces for heterostructured electrocatalysts.

Keywords: Ni-Ru nano-twins; hydrogen oxidation reaction; hydrogen evolution reaction; bifunctional catalyst; interface engineering.

*Corresponding authors: luhuajiang@qust.edu.cn (L. Jiang); zhouxin@dlu.edu.cn (X. Zhou); tsiak@uth.gr (P. Tsiakaras).

DOI:10.1016/j.cej.2022.139959


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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。团队获得国家自然科学二等奖1项、国家技术发明二等奖1项、省部级奖励4项,发表SCI论文200余篇,他引4000余次,获授权专利20余件。承担国家973前期研究专项、国家自然科学基金、山东省重点研究计划等多项国家级和省部级项目。团队负责人姜鲁华教授获得中国科学院“百人计划”择优支持,入选山东省“泰山学者”。
     欢迎有志于从事洁净电能源和纳米催化研究的老师和同学加入团队!

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