【作者】 高敏锐； 俞书宏；

【Author】 Min-Rui Gao;Shu-Hong Yu;

【机构】 中国科学技术大学化学系合肥微尺度物质科学国家实验室(筹)；

【摘要】 面向未来氢能经济的发展,迫切需要设计原材料丰富的高效非贵金属电催化剂。尽管目前已开发大量基于地球上丰产元素的替代电催化剂,然而仍需要进一步降低成本和提高其稳定性和催化活性。在本报告中,我们报道近年来在新型一维过渡金属硫属化物及嫁接的复合纳米电催化电极材料设计方面取得的进展。研制了基于二硒化钴-有机胺纳米带的系列新型非贵金属水电解阳极材料,发现廉价的二硒化钴自身具有内在的水氧化活性,通过引入新的功能性材料(四氧化三锰,二氧化铈和石墨烯等)能调节该材料的金属催化活性中心的电子结构,优化其对氧中间物的吸附键能,大大增强氧电极的反应速率;运用一步法所制备的二硒化钴/二硫化钼复合催化剂表现出优异的水还原催化活性。更多还原

【Abstract】 The future of hydrogen economy requires the design of cost-effective, highly active catalysts that are geologically abundant. Although a great many alternative catalysts based on earth-abundant elements have been developed for catalyzing oxygen evolution reaction（OER）, hydrogen evolution reaction（HER）, oxygen reduction reaction（ORR）, and hydrogen oxidation reaction（HOR）, substantial progresses are still needed in reducing the cost and improving activity and stability of these catalysts. In this Lecture, we will report our recent efforts on the synthesis of 1D metal chalcogenides and grafting related hybrid materials as efficient electrocatalysts for advanced electrolysis. 1D metal chalcogenide nanobelts, for example, CoSe₂/Amine nanobelts can be synthesized by a robust molecule template strategy. A group of new 1D CoSe₂-based hybrid materials can be synthesized by chemical grafting. The results demonstrated that the electrocatalytic performances of these 1D hybrids can be much enhanced because of their modified electrocatalytic interface, engineered electronic structure, and/or the combined catalytic proficiencies. The promising applications of these 1D hybrids for several important electrochemical reactions, such as OER, HER, and methanol-tolerant ORR will be discussed.更多还原