Polymer electrolyte membrane fuel cells (PEMFC) that run on hydrogen are one of the most promising alternatives to meet the future needs for power supply in portable, residential and transportation applications. These applications rely on safe storage and transportation of hydrogen. Hydrogen stored in a chemical form as liquid organic compounds and released in-situ on demand through efficient catalytic processes at low temperature is highly desirable. Specifically, methanol, an inexpensive bulk chemical, can reform with water and produce three hydrogen molecules (CH₃OH_(l) + H₂O_(l) = 3H₂ + CO₂, ∆H^°= + 131 kJ/mol) with high gravimetric density of 18.8 wt%. Here we demonstrate a low temperature (150-190 ^oC) base-free hydrogen production process based on aqueous-phase reforming of methanol (APRM) using a novel atomically dispersed Pt/α-MoC catalyst. The average turnover frequency (ATOF) reaches 18046 h^-1, which is by far the most active APRM catalyst reported at low temperature (<200^oC). The exceptional hydrogen production activity comes from the outstanding ability of α-MoC for water dissociation and the unique synergy between Pt₁ and α-MoC for methanol activation and successive reforming processes. We estimate that a catalyst unit containing around 6 grams of Pt could meet the requirements for powering a fuel cell vehicle at mild conditions, showing promise for commercial applications.

 

报告人简介：马丁，北京大学化学与分子工程学院/北京大学工学院教授。1996年四川大学化学系物理化学专业毕业。2001年获中国科学院大连化学物理研究所理学博士学位， 2000年美国国家高场实验室访问学生，2001-2005年牛津大学和Bristol大学博士后研究。2005年入选中国科学院“百人计划”，大连化学物理研究所催化基础国家重点研究室副研究员，2007年晋升研究员。主要针对我国社会能源和资源优化利用过程，开展氢能制备与输运，以及高值碳基化学品/油品合成等方面研究工作。获得2013年度北京大学青年教师教学比赛一等奖，2014年度王选青年学者奖，2017年中国催化青年奖，2017年度中国科学十大进展。国家自然科学基金委员优秀青年基金、杰出青年基金获得者。 2016年入选英国皇家化学会会士(Fellow of Royal Society of Chemistry)。2014-2017年担任英国皇家化学会Catalysis Science & Technology副主编；目前担任Chinese Journal of Chemistry、Science Bulletin副主编，Journal of Energy Chemistry、 Joule、ACS Catalysis、Catalysis Science & Technology等刊编委和顾问编委。