Improve the electrocatalytic performance of non-precious metal CoDETA/C catalyst for oxygen reduction reaction by post-treatment
Improve the electrocatalytic performance of non-precious metal CoDETA/C catalyst for oxygen reduction reaction by post-treatment
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DOI：
10.1016/j.ijhydene.2017.04.105
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发表时间：
2017-05
影响因子：
7.2
通讯作者：
Hui-Juan Zhang;Xu Zhang;Haoliang Li;Weimin Zhang;Zifeng Ma;Junhe Yang
中科院分区：
文献类型：
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作者：
Hui-Juan Zhang;Xu Zhang;Haoliang Li;Weimin Zhang;Zifeng Ma;Junhe Yang
为了提高非贵金属CoDETA/C催化剂在酸性和碱性介质中氧还原反应（ORR）的电催化性能，本文对酸浸及其再热解、碱浸及其再热解四种后处理方式进行了研究。XRD分析表明，纳米金属Co在酸性电解液中浸出后溶解，在碱性电解液中形成Co(OH)2。Raman表明，后处理后缺陷程度减小。电化学结果表明，浸出后处理及其再热解对CoDETA/C催化剂在酸性和碱性电解质中的ORR电催化活性均有积极影响。其中，酸浸和酸浸结合重热解是提高CoDETA/C催化剂在酸性电解液和碱性电解液中电催化性能的较好方法。浸出及其重热解的应用有助于提高CoDETA/C催化剂的ORR电催化性能。
In an attempt to improve the electrocatalytic performance of non-precious metal CoDETA/C catalyst for the oxygen reduction reaction (ORR) both in acid and alkaline media, herein, four types of post-treatment, including acid leaching and its re-pyrolysis, alkaline leaching and its re-pyrolysis are investigated. XRD indicates that there is a dissolution of nanometal Co after leaching in acid electrolyte and the formation of Co(OH)2in alkaline electrolyte. Raman shows that the degree of defect decreases after post-treatment. Electrochemical results display that post-treatment of leaching and its re-pyrolysis have a positive influence on the ORR electrocatalytic activity of CoDETA/C catalyst both in acid and alkaline electrolytes. In special, acid leaching and acid leaching combined with re-pyrolysis is a wise way to increase the electrocatalytic performance of CoDETA/C catalyst in acid and alkaline electrolyte, respectively. Application of leaching and its re-pyrolysis is thus revealed to be useful for improving the ORR electrocatalytic performance of CoDETA/C catalyst.