内核含Pd的Pt基核壳结构电催化剂

发布时间：2018-09-12 11:05

【摘要】：燃料电池汽车已被确立为我国的战略性新兴产业,目前正处于大规模商业化的前夜,铂基电催化剂作为质子交换膜燃料电池的核心材料之一,其活性、耐久性和成本制约着这一洁净能源技术的进一步发展。高性能低铂核壳电催化剂被广泛认为有望解决这一瓶颈问题,虽然国内外在这一领域的研究取得了诸多重要的进展,但是仍存在着制备过程复杂、非铂贵金属内核尺寸较大及核壳结构宏观表征困难等问题。本文介绍两种相对简单、易放大的制备方法,即一锅法和液相合成结合区域选择原子层气相沉积法,均获得了性能优良的Pd3Au@Pt/C核壳结构电催化剂,Pd3Au内核尺寸控制在约5 nm,并利用循环伏安测试和甲酸氧化反应从宏观角度研究了铂层在内核表面的覆盖情况,探索了含钯核壳结构电催化剂的新型宏观表征方法。
[Abstract]:Fuel cell vehicles (FCVs) have been established as a strategic emerging industry in China and are now on the eve of large-scale commercialization. Platinum based electrocatalyst is one of the core materials of proton exchange membrane fuel cells (PEMFC). Durability and cost constrain the further development of this clean energy technology. High performance low platinum core-shell electrocatalysts are widely considered to be promising to solve this bottleneck problem. Although many important progress has been made in this field at home and abroad, the preparation process is still complex. The size of non-platinum noble metal core is large and the macroscopical characterization of core-shell structure is difficult. In this paper, two relatively simple and easy to amplify preparation methods, one pot method and liquid phase synthesis combined region selective atomic layer vapor deposition method are introduced. The core size of Pd3Au was controlled at about 5 nm, and the coating of platinum layer on the surface of the core was studied by cyclic voltammetry and formic acid oxidation reaction. A new macroscopical characterization method for palladium-containing core-shell electrocatalysts was investigated.
【作者单位】：大连理工大学化工学院精细化工国家重点实验室;中国科学院大连化学物理研究所;中国科学院大学;
【基金】：国家重点研发计划(2016YFB0101307) 国家重点基础研究发展计划(973)(2012CB215502) 国家自然科学基金(21003114,21103163,21306188,21373211,21306187) 辽宁省百千万人才工程(201519) 辽宁省高校优秀人才计划(LR2015014) 大连市优秀青年科技人才(2015R006) 中央高校基本科研基金(DUT15RC(3)001,DUT15ZD225)资助项目~~
【分类号】：O643.36

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