Advanced Materials Institute of BIN Convergence Technology (BK21 Plus Global), Department of BIN Convergence Technology, and ‡Carbon Composite Research Centre, Department of Polymer & Nanoscience and Technology, Chonbuk National University , Jeonju, Jeonbuk 54896, Republic of Korea.
ACS Appl Mater Interfaces. 2018 Feb 7;10(5):4672-4681. doi: 10.1021/acsami.7b16294. Epub 2018 Jan 25.
Development of a robust, cost-effective, and efficient catalyst is extremely necessary for oxygen reduction reaction (ORR) in fuel cell applications. Herein, we reported a well-defined nanostructured catalyst of highly dispersed CuAg@Ag core-shell nanoparticle (NP)-encapsulated nitrogen-doped graphene nanosheets (CuAg@Ag/N-GNS) exhibiting a superior catalytic activity toward ORR in alkaline medium. The synergistic effects produced from the unique properties of CuAg@Ag core-shell NPs and N-GNS made such a novel nanohybrid display a catalytic behavior comparable to that of the commercial Pt/C product. In particular, it demonstrated a much better stability and methanol tolerance than Pt/C under the same conditions. Because of its outstanding electrochemical performance and ease of synthesis, CuAg@Ag/N-GNS material was expected to be a promising low-cost catalyst for ORR in alkaline fuel cell applications.
在燃料电池应用中，开发一种稳健、经济高效的催化剂对于氧还原反应（ORR）是极其必要的。在此，我们报道了一种高度分散的 CuAg@Ag 核壳纳米颗粒（NP）封装氮掺杂石墨烯纳米片（CuAg@Ag/N-GNS）的明确定义的纳米结构催化剂，在碱性介质中对 ORR 表现出优异的催化活性。CuAg@Ag 核壳 NPs 和 N-GNS 的独特性质产生的协同效应使得这种新型纳米杂化物表现出与商业 Pt/C 产品相当的催化行为。特别是，在相同条件下，它显示出比 Pt/C 更好的稳定性和甲醇耐受性。由于其出色的电化学性能和易于合成，CuAg@Ag/N-GNS 材料有望成为碱性燃料电池应用中 ORR 的一种有前途的低成本催化剂。
