| 查看: 298 | 回复: 0 | |||
[交流]
share one recent important paper published in ACS Catalysis
|
|
Enhancement of Stability and Activity of MnOx/Au Electrocatalysts for Oxygen Evolution through Adequate Electrolyte Composition Qiang Gao†, Chinmoy Ranjan*†, Zoran Pavlovic†, Raoul Blume‡, and Robert Schlögl† † Max Planck Institute for Chemical Energy Conversion, Stiftstrasse 34-36, 45470 Mülheim an der Ruhr, Germany ‡ Fritz Haber Institute of the Max Planck Society, Faradayweg 4-6, 14195 Berlin, Germany ACS Catal., 2015, 5, pp 7265–7275 DOI: 10.1021/acscatal.5b01632 Publication Date (Web): October 27, 2015 Copyright © 2015 American Chemical Society Oxygen evolution and catalyst corrosion were studied side by side for electrodeposited MnOx catalysts. Measurements using a combination of electrochemical flow cell, atomic absorption spectroscopy, and rotating ring disk electrode reveal a high sensitivity of oxygen evolution and of manganese oxide corrosion toward the presence of ions (alkali-metal cations and anions) in the electrolyte. The charge to radius ratio of alkali-metal ions affected the reactivity of the oxides and was seen to influence the reaction under both potentiostatic and potentiodynamic conditions, with Li+- and (K+,Cs+)-containing electrolytes showing the lowest and highest activities, respectively. Thermogravimetry in combination with mass spectrometry showed significant differences between samples treated in different electrolytes. Raman spectroscopy showed that the material transformed during the oxygen evolution reaction, with multiple phases α-MnO2 and birnessite-MnO2 being present in the catalyst during oxygen evolution reaction. Electronic structure (XANES) studies revealed the significant influence of alkali-metal ions on the oxidation state of Mn, with the OER-inactive Mn2+ oxidation state being stabilized with the Li+ ion. It was found that selected combinations of anions and cations in the electrolyte and suitable potential can significantly stabilize the electrode during OER application. |
回复此楼» 本帖附件资源列表
-
欢迎监督和反馈：小木虫仅提供交流平台，不对该内容负责。
本内容由用户自主发布，如果其内容涉及到知识产权问题，其责任在于用户本人，如对版权有异议，请联系邮箱：xiaomuchong@tal.com - 附件 1 : final_version_of_our_first_masterpiece.pdf
2015-11-11 23:15:14, 583.6 K
» 猜你喜欢
请问谁有2025最新影响因子Excel表？金币求助！
已经有53人回复
-
氯化钠与有机磺酸分离
已经有1人回复
-
物理化学论文润色/翻译怎么收费?
已经有255人回复
-
瑞典-博后-固态电池-粘结剂-锂离子电池方向
已经有53人回复
-
广东省面上有什么动态么，啥时候公布呀？
已经有1人回复
-
高盐废水电催化氧化，氯离子存在下活性氯副产物、阳极选型的工程困惑
已经有0人回复
-
固相反应中颗粒形貌变化计算模拟学习求助
已经有0人回复
-
电催化氧化技术处理高盐难降解废水具备独特优势
已经有0人回复
30