期刊
CHEMICAL ENGINEERING JOURNAL
卷 358, 期 -, 页码 427-434出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cej.2018.09.185
关键词
Reaction milling; Covalent organic frameworks; Nitrogen and phosphorus co-doped carbon materials; Metal free electrocatalyst; Oxygen reduction; Oxygen evolution
资金
- National Key Research and Development Program of China [2017YFA0206500]
- NSF of China [21676020, 51502012, 21620102007, 21606015]
- Beijing Natural Science Foundation [17L20060, 2162032]
- Young Elite Scientists Sponsorship Program, CAST [2017QNRC001]
- Start-up fund for talent introduction of Beijing University of Chemical Technology [buctrc201420, buctrc201714]
- Talent cultivation of State Key Laboratory of Organic-Inorganic Composites
- Open project of the State Key Laboratory of Organic-Inorganic Composites [OIC-201801007]
- Distinguished scientist program at BUCT [buctylkxj02]
- 111 project of China [B14004]
This study exploits an effective mechanochemical process (termed as reaction milling) to conduct Schiff-based coupling reaction with melamine and terephthalaldehyde for the synthesis of covalent organic polymer (RMCOP) as the carbon skeleton and the derivative phosphorus doped material (RM-COP-PA). Comparing with the tradition solvothermal method with reaction time of 3 days under 120 degrees C, the newly developed reaction milling method significantly shorten the reaction time of the synthesis to 3 h under room temperature as well as bypassing the usage for hazardous solvents. The space-time yield of the developed reaction milling method for synthesis of the bifunctional electrocatalytic precursor reaches 189 kg m(-3) day(-1). Significantly, the optimal products followed by further carbonization (RM-COP-PA-900) demonstrated excellent bifunctional electrocatalytic activities for an efficient ORR performance with similar commercialized Pt/C half-potential of 841 mV vs RHE as well as an IrO2-like OER activity with a potential of 1.69 V at 10 mA cm(-2) in alkaline media, which is better than most metal-free bifunctional catalysts. Moreover, the obtained RM-COP-PA-900 exhibits much better durability and resistance to crossover effect even than the commercial 20 wt% Pt/C catalysts. Therefore, this work will open up a rapid, solvent-free and scalable approach for, but not limit to, highly efficient electrocatalysts.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据