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121. Steering Pt/C to Highly Active CO-Tolerant Hydrogen Oxidation Reaction Catalyst in Alkaline Media via N-Doped Carbon Layer Confinement, Applied Surface Science,2023, 614,156131.
2022-10-25 20:00  

Boyang Zhang, Jing Liu*, Wanqing Yu, Xuejing Cui, Luhua Jiang*

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

Qingdao, Shandong 266042, China.

Abstract:

Improving the CO-tolerant ability of Pt-based electrocatalysts is crucial for fuel cells fed with industrial byproduct hydrogen. Herein, we present a novel core-shell structured Pt@NC/C catalyst consisting of ultrafine Pt nanoparticles (1.63 nm) as the core and ultrathin nitrogen doped carbon layers (0.36 nm) as the shell. The catalyst exhibits excellent alkaline hydrogen oxidation reaction (HOR) activity with a mass activity of 187 A g-1Pt and a specific activity of 0.20 mA cm-2Pt, which are 1.3 and 2.2-folds to the counterpart Pt/C, respectively. More remarkably, it shows good anti CO-poisoning ability. In presence of H2 with 100 ppm CO, the HOR current decreased by 18.22% on 10% Pt/C versus only 4.81% on 10% Pt@NC/C-400. The combined COad stripping, CO oxidation and Zeta potential measurements imply that hydroxyl adsorption is enhanced on the NC covered Pt in 10% Pt@NC/C-400, resulting in accelerated HOR kinetics and improved anti-CO ability. This work provides a facile and feasible strategy to design efficient and CO-resistantto Pt-based catalysts.

Keywords: anion exchange membrane fuel cells; hydrogen oxidation reaction; CO poisoning; platinum catalyst

*Corresponding authors: liuj955@qust.edu.cn (J. Liu); luhuajiang@qust.edu.cn (L. Jiang).



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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”。
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