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Chemically Deposited Amorphous Zn-Doped NiFeOxHy for Enhanced Water Oxidation
ACS Catalysis ( IF 11.3 ) Pub Date : 2019-12-06 , DOI: 10.1021/acscatal.9b03544
Sung Yul Lim 1, 2 , Sunghak Park 1 , Sang Won Im 1 , Heonjin Ha 1 , Hongmin Seo 1 , Ki Tae Nam 1
ACS Catalysis ( IF 11.3 ) Pub Date : 2019-12-06 , DOI: 10.1021/acscatal.9b03544
Sung Yul Lim 1, 2 , Sunghak Park 1 , Sang Won Im 1 , Heonjin Ha 1 , Hongmin Seo 1 , Ki Tae Nam 1
Affiliation
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Although NiFeOxHy has attracted enormous attention as an alkaline water electrolyzer owing to its high performance in the oxygen evolution reaction (OER), it still requires further improvement in terms of catalytic activity, durability, and an underlying understanding of the mechanism. Here we report the fabrication of Zn-doped NiFeOxHy (Zn;NiFeOxHy) that has advanced electrocatalytic activity and stability in comparison to pure NiFeOxHy in the OER via simple chemical bath deposition and electrochemical activation. The improvement with Zn;NiFeOxHy is due to the Zn2+ dopant, a strong Lewis acid that modulates its electronic property for better intermediate binding for the electrochemical process, resulting in the stabilization of the OER-active phase. This work opens up an opportunity to elucidate the detailed mechanism of NiFeOxHy-based electrocatalysts and improves our understanding of redox tuning through inductive effects, thereby leading to advanced OER catalyst developments.
中文翻译:
化学沉积的非晶态掺杂Zn的NiFeO x H y可增强水的氧化作用
尽管NiFeO x H y由于其在氧气释放反应(OER)中的高性能而作为碱性水电解槽备受瞩目,但它仍需要在催化活性,耐久性和对机理的基本理解方面进行进一步的改进。在这里,我们报告了通过简单的化学浴沉积和电化学活化,与在OER中的纯NiFeO x H y相比,具有先进的电催化活性和稳定性的掺杂Zn的NiFeO x H y(Zn; NiFeO x H y)的制造。Zn; NiFeO x H y的改善归因于Zn 2+掺杂剂,一种强路易斯酸,可调节其电子性能,以实现电化学过程中更好的中间键合,从而使OER活性相稳定。这项工作为阐明基于NiFeO x H y的电催化剂的详细机理开辟了机会,并增进了我们对通过感应效应进行氧化还原调节的理解,从而促进了先进的OER催化剂的发展。
更新日期:2019-12-06
中文翻译:
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化学沉积的非晶态掺杂Zn的NiFeO x H y可增强水的氧化作用
尽管NiFeO x H y由于其在氧气释放反应(OER)中的高性能而作为碱性水电解槽备受瞩目,但它仍需要在催化活性,耐久性和对机理的基本理解方面进行进一步的改进。在这里,我们报告了通过简单的化学浴沉积和电化学活化,与在OER中的纯NiFeO x H y相比,具有先进的电催化活性和稳定性的掺杂Zn的NiFeO x H y(Zn; NiFeO x H y)的制造。Zn; NiFeO x H y的改善归因于Zn 2+掺杂剂,一种强路易斯酸,可调节其电子性能,以实现电化学过程中更好的中间键合,从而使OER活性相稳定。这项工作为阐明基于NiFeO x H y的电催化剂的详细机理开辟了机会,并增进了我们对通过感应效应进行氧化还原调节的理解,从而促进了先进的OER催化剂的发展。