Supported core@shell electrocatalysts for fuel cells: close encounter with reality.
Supported core@shell electrocatalysts for fuel cells: close encounter with reality.
复制标题
DOI：
10.1038/srep01309
复制
发表时间：
2013
影响因子：
4.6
通讯作者：
Kim, Soo-Kil
中科院分区：
文献类型：
--
作者：
Hwang, Seung Jun;Yoo, Sung Jong;Shin, Jungho;Cho, Yong-Hun;Jang, Jong Hyun;Cho, Eunae;Sung, Yung-Eun;Nam, Suk Woo;Lim, Tae-Hoon;Lee, Seung-Cheol;Kim, Soo-Kil
核壳型燃料电池电催化剂具有铂利用率高、电子结构可修饰以提高活性等优点。在这项研究中，我们提出了设计高活性和稳定的核@Shell/C的理论背景和一种新的简便的合成策略。在氧吸附能和空位形成能的指导下，采用密度泛函理论计算了Pd3Cu1@Pt/C催化剂的氧还原活性和稳定性。这些预测得到了Pd3Cu1/C核的无表面活性剂合成和以Hantzsch酯为还原剂的选择性铂壳形成的实验验证。以同样的方式设计合成了用于氢氧化反应的Pd@Pd4Ir6/C催化剂。所开发的催化剂表现出高活性、高选择性和在单电池水平上的4,000 h的长期寿命。
Core@shell electrocatalysts for fuel cells have the advantages of a high utilization of Pt and the modification of its electronic structures toward enhancement of the activities. In this study, we suggest both a theoretical background for the design of highly active and stable core@shell/C and a novel facile synthetic strategy for their preparation. Using density functional theory calculations guided by the oxygen adsorption energy and vacancy formation energy, Pd3Cu1@Pt/C was selected as the most suitable candidate for the oxygen reduction reaction in terms of its activity and stability. These predictions were experimentally verified by the surfactant-free synthesis of Pd3Cu1/C cores and the selective Pt shell formation using a Hantzsch ester as a reducing agent. In a similar fashion, Pd@Pd4Ir6/C catalyst was also designed and synthesized for the hydrogen oxidation reaction. The developed catalysts exhibited high activity, high selectivity, and 4,000 h of long-term durability at the single-cell level.
登录
查看更多内容
影响因子：
15
作者：
Gong, Kuanping;Su, Dong;Adzic, Radoslav R.
通讯作者：
Adzic, Radoslav R.
影响因子：
15
作者：
Mazumder, Vismadeb;Chi, Miaofang;Sun, Shouheng
通讯作者：
Sun, Shouheng
影响因子：
15
作者：
Chen, Shuo;Ferreira, Paulo J.;Shao-Horn, Yang
通讯作者：
Shao-Horn, Yang
影响因子：
3.3
作者：
Norskov, JK;Rossmeisl, J;Jónsson, H
通讯作者：
Jónsson, H
影响因子：
21.8
作者：
Greeley, J.;Stephens, I. E. L.;Norskov, J. K.
通讯作者：
Norskov, J. K.