Electrochemical modification and deposition of bifunctional metal-alloys and metal-oxides

双功能金属合金和金属氧化物的电化学改性和沉积

• 批准号: 2111631
• 金额: --
• 依托单位: University of Liverpool
• 依托单位国家: 英国
• 项目类别: Studentship
• 财政年份: 2018
• 资助国家: 英国
• 起止时间: 2018 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=studentship-2111631
• 关键词: Electrochemical; modification; deposition; bifunctional; metal

Electrocatalysts are extremely important in energy conversion. While it is universally accepted that platinum are relatively excellent catalysts, it is reported that platinum alloys have a higher catalytic activity [2]. In this present example, one Pt Black electrode was replaced by a Pt/Ru Oxide electrode with increased effects. Other non-noble element versions such as Cu, Ni have been considered. However, the issues with platinum electrodes are not only the production cost but also the electrochemical oxidations that occur during processes that hinder its catalytic activities and thus performance due to progressive degradation [3].The present and future work will deal with the characterisation of the intrinsic relationship between the electrolyte and the material electrode at atomic level with electrochemical and structural techniques so as to understanding what governs affinity, stability and reactivity of electrode materials. Three objectives are set: the study of metal oxidation in the case for instance of Cu and Ni in variable low pH concentration; the metal deposition in oxidising controlled environment and the metallic, bimetallic oxide material electrodeposition. In order to extrapolate and have consistent results, work will be done firstly on single crystal and then pursued on binary bulk crystals.References:[1] F. Vigier, C. Coutanceau, A. Perrard, E.M. Belgsir, C. Lamy, "Development of anode catalysts for a direct ethanol fuel cell", Journal of Applied Electrochemistry, 34 (2004) 439-446[2] J. Cheng, D.A. Cullen, R.V. Forest, J.A. Wittkopf, Z. Zhuang, W. Sheng, J.G. Chen, Y. Yan, "Platinum-Ruthenium Nanotubes and Platinum-Ruthenium Coated Copper Nanowires As Efficient Catalysts for Electro-Oxidation of Methanol", ASC Catalysis, 5 (2015) 1468-1474[3] J. Drnec, D.A. Harrington and O.M. Magnussen, "Electrooxidation of Pt(111) in acid solution", Current Opinion in Electrochemistry 4 (2017) 69-75

电催化剂在能量转换中起着极其重要的作用。虽然人们普遍认为铂是较好的催化剂，但有报道称铂合金具有较高的催化活性[2]。在本例中，一个Pt黑色电极被一个Pt/Ru氧化物电极取代，效果增强。其他非贵重元素的版本，如Cu， Ni已被考虑。然而，铂电极的问题不仅在于生产成本，而且在过程中发生的电化学氧化也会阻碍其催化活性，从而由于逐步降解而影响其性能。目前和未来的工作将涉及电解液和材料电极在原子水平上的内在关系的表征与电化学和结构技术，以了解是什么决定了电极材料的亲和力，稳定性和反应性。设定了三个目标：研究金属在变低pH浓度下的氧化，例如Cu和Ni；氧化控制环境下的金属沉积及金属、双金属氧化物材料的电沉积。为了进行外推并得到一致的结果，将首先在单晶上进行工作，然后在二元体晶体上进行工作。参考文献：[1]F. Vigier， C. Coutanceau, a . Perrard， E.M. Belgsir， C. Lamy，“直接乙醇燃料电池负极催化剂的研究”，应用电化学，34(2004)439-446[1]，程杰，d.a Cullen， R.V. Forest， J.A. Wittkopf，庄之，盛伟，陈金光，严勇，“铂-钌纳米管和铂-钌包覆铜纳米线在甲醇电氧化中的高效催化剂”，催化学报，5 (2015)1468-1474[3]J. Drnec，d.a Harrington和O.M. Magnussen，“Pt（111）在酸性溶液中的电氧化”，电化学学报4 (2017)69-75