报告摘要：
High cost and insufficient durability are the two major challenges in Fuel cell development and commercialization. For proton exchange membrane fuel cells (PEMFCs), electrocatalysts, and in particular Platinum (Pt)-based electrocatalysts, are the major contributor to both of these barriers. In order to develop cost-effective and durable catalysts, two research approaches have been carried out for many years, one is to reduce Pt loading, and the other is explore non-noble metal catalysts. Regarding reduction of Pt loading, alloying Pt with other metal(s) to form low-Pt content catalysts is considered one of the most effective ways to reduce catalyst cost and at the same time to enhance catalyst activity. With respect to the development of non-noble metal catalysts, several kinds of promising catalysts have been explored, including heat-treated transition metal microcycles and transition metal chalcogenides, although their activities and stabilities are still far away from real fuel cell application targets. At this stage, enhancing the activity of non-noble metal catalysts is a key task.
At the National Research Council of Canada Institute for Fuel Cell Innovation (NRC-IFCI), research activities in fuel cell catalysis have resulted in several non-noble metal catalysts, which all show high activity in a operating fuel cell environment. In particular, a proprietary technique called ultrasonic spray pyrolysis shows advantages in addressing the current challenges of fuel cell catalysts. Using this technology, high-surface-area, porous, and self-supported transition metal-Nx-C based catalysts were developed to enhance active site density of non-noble metal catalysts. In addition, Pt-based alloys including core-shell structured Pt alloy catalysts were also prepared with high-surface-area porous carbon and non-carbon spheres simultaneously to reduce alloy particle size and increase the active surface area. For fundamental understanding, we also carried out quantum chemical calculation methods to model catalyst structure and catalytic reaction mechanisms for the design of new non-noble metal catalysts.
In this presentation, the challenges and perspectives of fuel cell catalysis were also reviewed and some research directions in this area were also suggested in terms of achieving breakthroughs towards fuel cell commercialization.
报告人简介：
张久俊博士具有近30年的电化学研究资历，教授，项目经理，分别担任中国、美国以及加拿大核心资历团队负责人。同时兼任加拿大英属哥伦比亚大学、滑铁卢大学和中国北京大学、武汉大学等13所大学兼职教授职位。1978 年考入北京大学化学系，分别获学士和硕士学位，1988年于武汉大学获电化学博士学位，1991至1993年于美国加州理工学院（California Institute of Technology）进行燃料电池催化剂的博士后研究，后加入加拿大约克大学（York University) 及英属哥伦比亚大学 (University of British Columbia) 从事非铂电催化剂和传感器开发。1998年作为高级科学家加入世界顶级燃料电池公司加拿大Ballard公司（Ballard Power Systems Inc）从事质子交换膜燃料电池（PEMFC）研究，并担任团队和项目经理。2004年作为电化学和燃料电池专家之一受任于加拿大国家研究院燃料电池创新研究所（NRC-IFCI). 自2013年起被评为加拿大国家研究院首席科学家。至今已发表科学论文300多篇，被引用10000多次，编著12本专著，26部书章节和90多场口头演讲（邀请报告50多次），获16项美国及欧洲专利和撰写80多份科学技术报告。其研究领域涉及物理化学、材料学、电化学、电分析、电催化、电池、锂离子电池、燃料电池、超级电容器、光电化学以及传感器等各个方面。目前主要集中于纳米材料（电极材料和电极催化剂），纳米技术在电化学能源、转换和存储方面，包括燃料电池、电池以及超级电容器等方面的研究开发。张久俊教授现在是知名国际丛书及期刊的主编和编委, 加拿大国家自然科学与技术等重要基金评委，加拿大明星教授评审委员会评委，国际电化学会，美国化学会，美国电化学会，及美国国家地理学会会员, 任国际电化学能源科学院主席，参与美国欧洲澳大利亚等国著名科技基金及中国自然科学奖励评审。
