Pyrolyzing cobalt diethylenetriamine chelate on carbon (CoDETA/C) as a family of non-precious metal oxygen reduction catalyst
Pyrolyzing cobalt diethylenetriamine chelate on carbon (CoDETA/C) as a family of non-precious metal oxygen reduction catalyst
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热解碳载钴二亚乙基三胺螯合物 (CoDETA/C) 作为非贵金属氧还原催化剂家族
DOI：
10.1016/j.ijhydene.2013.09.084
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发表时间：
2014-01
影响因子：
7.2
通讯作者：
Yang, Junhe
中科院分区：
文献类型：
--
作者：
Zhang, Hui-Juan;Li, Haoliang;Li, Xiangtai;Qiu, Hanxun;Yuan, Xianxia;Zhao, Bin;Ma, Zi-Feng;Yang, Junhe
使用二亚乙基三胺配体，通过在600至900 °C的高温下热解碳上的钴-二亚乙基三胺螯合物来合成一族非贵金属氧还原催化剂。循环伏安结果表明，热解温度对催化剂活性有重要影响，在800 °C时催化剂活性最高，峰电位为719 mV（SHE）。对于最好的催化剂HT 800，双环盘电极测量表明，在0.5 V的电势下，在100 - 1600 rpm的转速下，转移的电子数为3.80-3.85，催化剂负载量为648 μg cm-2。XRD分析表明，钴氮螯合物在600 °C以上发生分解，生成不同尺寸的纳米α-Co。拉曼光谱表明，N掺杂导致碳表面缺陷增多。结合XPS数据和电化学结果，表明较高的总N含量并不导致较高的ORR活性。
Using diethylenetriamine ligand, a family of non-precious metal oxygen reduction catalyst is synthesized by pyrolysis of cobalt-diethylenetriamine chelate on carbon at elevated temperature from 600 to 900 °C. Cyclic voltammetry results show that pyrolysis temperature plays an important impact on improving catalytic activity and the maximum activity is obtained at 800 °C with its peak potential of 719 mV (SHE). For the best catalyst HT800, rotating-ring disk electrode measurement indicates that the number of electrons transferred is 3.80–3.85 at potential of 0.5 V with rotating rates from 100 to 1600 rpm and the catalyst loading of 648 μg cm−2. XRD indicates that the cobalt-nitrogen chelate decomposes above 600 °C and nanometallic α-Co with different sizes is synthesized. Raman indicates that there are more defective sites on the carbon surfaces induced by N doping. Combined XPS data with electrochemical results, it indicates that a higher total N content does not lead to a higher ORR activity.
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影响因子：
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