A novel nitrogen-containing electrocatalyst for oxygen reduction reaction from blood protein pyrolysis
A novel nitrogen-containing electrocatalyst for oxygen reduction reaction from blood protein pyrolysis
复制标题
DOI：
10.1016/j.jpowsour.2013.07.037
复制
发表时间：
2014-01-01
影响因子：
9.2
通讯作者：
Luo, Zhong-Li
中科院分区：
文献类型：
--
作者：
Guo, Chao-Zhong;Chen, Chang-Guo;Luo, Zhong-Li
我们报道了一种新的策略，通过血液蛋白和炭黑载体的共热解来设计含氮的碳基电催化剂。结果表明，电催化剂中的氮主要以吡啶型和吡咯型氮物种的形式存在。高温热解过程可以将大量的吡啶-N转化为吡咯-N。在起始电位、半波电位和极限电流密度方面，含有较高量的吡咯-N构型的电催化剂对氧还原反应表现出更好的电催化活性。这表明，吡咯-N构型可能是电催化活性位点，并可能是负责在碱性介质中增强的ORR性能。炭黑载体在热解过程中也起着重要作用，提高了ORR催化活性。(C)2013爱思唯尔有限公司版权所有。
We report a new strategy to design carbon-based electrocatalysts containing nitrogen through the co-pyrolysis of blood protein and carbon black support. The results show that the nitrogen in electrocatalysts is primarily in the form of pyridinic- and pyrrolic-type nitrogen species. High-temperature pyrolysis processes can transfer a significant amount of pyridinic-N to pyrrolic-N. The electrocatalyst containing a higher amount of the pyrrolic-N configuration exhibits better electrocatalytic activity towards oxygen reduction reaction in terms of onset potential, half-wave potential, and limited current density. It is suggested that the pyrrolic-N configuration may be the electrocatalytically active site and may be responsible for the enhanced ORR performance in alkaline media. The carbon black support also plays an important role in the pyrolysis process, improving the ORR catalytic activity. (C) 2013 Elsevier B.V. All rights reserved.