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77. Mesoporous Mn-doped FeP: facile synthesis and enhanced electrocatalytic activity for hydrogen evolution in a wide pH range, ACS Sustainable Chemical and Engineering, 2019, 7, 12419−12427
2019-05-20 13:41  

Mesoporous Mn-doped FeP: facile synthesis and enhanced electrocatalytic activity for hydrogen evolution in a wide pH range

Min Wang, Yongxiao Tuo, Xiaoke Li, Qingfeng Hua, Luhua Jiang *

Nanomaterial and Electrocatalysis Laboratory, College of Materials Science & Engineering, Qingdao University of Science & Technology, 53 Zhengzhou Road, Qingdao 266042, PR China.

E-mail: luhuajiang@qust.edu.cn (L. Jiang)

Abstract

Water electrolysis is a clean and efficient approach to produce hydrogen on a large scale. Among the reported non-precious metal catalysts for the cathodic hydrogen evolution reaction (HER), iron phosphide is one of the most promising candidate; however, the catalytic activity of FeP is far behind Pt. Herein, we report a highly efficient and durable mesoporous Mn-doped FeP (Mn-FeP) catalyst for the HER via a facile and controllable synthesis route. Electrochemical tests demonstrate that Mn doping leads to enhanced HER performance of mesoporous FeP in a wide pH range. With the Mn-FeP catalyst, the overpotential of the HER to reach a current density of 10 mA cm-2 is 69, 157 and 173 mV in the H2SO4, PBS and KOH electrolyte, respectively, which is 21, 40 and 54 mV less than that of its counterpart mesoporous FeP. Combining the experimental results and the DFT calculation, it is concluded that the enhanced HER activity of Mn-FeP is ascribed to both the accessible active sites benefiting from the mesoporous structure and the appropriate thermo-neutral hydrogen adsorption free energy. Heteroatom doping is an effective strategy to modulate the electron structure of TMPs and is expected to provide a new avenue to promote the HER activity of TMPs.

Keywords: Hydrogen evolution; Water electrolysis; Mn-doped FeP; Mesoporous material; DFT

DOI:10.1021/acssuschemeng.9b01952


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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,SCI他引>8000次,H指数49。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。申请发明专利百余件,授权专利60余件。参与编写英文著作4部,译著1部。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。团队培养硕博士研究生50余名,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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