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配合基氧氧进化催化剂为有效的阳离子交换膜水电解

Jinse Woo¹, Sanghwi Han¹, Jeyong Yoon¹

¹School of Chemical and Biological Engineering, Institute of Chemical Processes, Seoul National University (SNU), Seoul 08826, Republic of Korea.

ACS applied materials & interfaces

|April 25, 2024

概括

开发用于氧化演化反应的化基催化剂可通过离子交换膜水电解显著增加绿色的生产. 这些持久催化剂提高了效率,降低了可持续能源的成本.

科学领域:

材料科学材料科学材料科学
电化学电化学电化学
催化剂是一种催化剂.

背景情况:

高性能和持久的氧化演化反应 (OER) 催化剂对于使用离子交换膜水电解 (AEMWE) 的高效绿色生产至关重要.
寻求非贵金属催化剂以降低水电解的成本.

研究的目的:

在AEMWE中设计和合成支持FeO (((OH)) (FCM) 的新型Mn-doped Co-based OER催化剂,以提高AEMWE中的活性和耐用性.
调查胺兴奋剂对基于CO的OER催化剂结构和电化学性能的影响.

主要方法:

一系列在FeO(OH) 支持的Mn-doped Co-based催化剂的合成.
电化学表征包括半电池条件下的OER活性,超电位和Tafel斜率测量.
在现场拉曼光谱检查以确认在OER期间的结构转换.
在单细胞离子交换膜水电解 (AEMWE) 系统中评估催化剂性能.

主要成果:

胺兴奋剂有效地降低了氧化颗粒的大小,增加了活性表面积.
胺兴奋剂诱导氧气空缺,在OER期间促进高效的结构转换,由现场拉曼光谱学证实.
最佳的催化剂在10 mA cm−2时达到234.4 mV的超电位,Tafel斜率为37.2 mV dec−1.
在AEMWE单细胞系统中,催化剂的电流密度为1.560mAcm-2在60°C的1.8V时.
观察到异常耐用性,降解率为0.4 mV h−1在500小时内在500mA cm−2.2下降解速度为0.4 mV h−1.

结论:

支持FeO(OH) 的Co基催化剂代表了非贵金属OER催化剂的重大进步.
开发的催化剂具有高活性,优异的耐用性,并有可能通过AEMWE实现经济高效的绿色生产.

关键词:

离子交换膜水电解水的电解.科巴尔特是什么意思科巴尔特是什么意思的兴奋剂的兴奋剂氧气进化反应反应氧气进化反应氧气空缺的地方.顺序式的电极位置.

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