Influence of the MnO2 Phase on Oxygen Evolution Reaction Performance for Low‐Loading Iridium Electrocatalysts,ChemElectroChem

当前位置： X-MOL 学术 › ChemElectroChem › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

Influence of the MnO2 Phase on Oxygen Evolution Reaction Performance for Low‐Loading Iridium Electrocatalysts
ChemElectroChem ( IF 3.5 ) Pub Date : 2021-01-11 , DOI: 10.1002/celc.202001513
Zheyuan Wang ₁ , Wenluan Gao ₁ , Qingli Xu ₁ , Xiaona Ren ₁ , Shuang Xu ₁ , Shuaikang Zhu ₁ , Xiaopo Niu ₁ , Xiaoxue Li ₁ , Rong Zhao ₁ , Yunxi Han ₁ , Guozhu Li ₁ , QingFa Wang ₂

Affiliation

Developing high‐performance, low‐loading, Ir‐based electrocatalysts for the oxygen evolution reaction (OER) in acidic media is still a great challenge. Herein, we fabricated an iridium manganese catalyst with only 5 % iridium. The influence of the manganese dioxide phase states (α‐, β‐, γ‐ and δ‐MnO₂) on the OER performance of IrO₂/MnO₂ catalysts was investigated. α‐MnO₂, as the substrate, can generate smaller iridium particles and more high‐valence‐state iridium to promote OER performance. Therefore, the 5 % IrO₂/α‐MnO₂ electrocatalyst exhibits excellent electrocatalytic OER performance with a high mass activity of 216.67 A/g_Ir and 655.33 A/g_Ir at 1.53 V in acidic and alkaline media, respectively, significantly outperforming commercial IrO₂.

中文翻译：

MnO2相对低负荷铱电催化剂析氧反应性能的影响

为酸性介质中的氧释放反应（OER）开发高性能，低负荷，基于Ir的电催化剂仍然是一个巨大的挑战。本文中，我们制备了仅含5％铱的铱锰催化剂。二氧化锰相位状态的影响（α-，β-，γ-和δ-的MnO ₂上的IrO的OER性能）₂ / MnO的_2种进行了研究催化剂。α-MnO的₂，作为基板，可以产生更小的颗粒铱和更高价态的铱促进OER性能。因此，5％的IrO ₂ /α-MnO的_2个电展品与216.67 A / g的高质量活性良好的电性能OER_的Ir和655.33 A /克分别在酸性和碱性介质中处于1.53 V电压下的_Ir明显优于商用IrO ₂。

更新日期：2021-01-28

点击分享查看原文

点击收藏

阅读更多本刊新发论文本刊介绍/投稿指南