Details

Autor(en) / Beteiligte

• Jiang, Kun
• Back, Seoin
• Akey, Austin J
• Xia, Chuan
• Hu, Yongfeng
• Liang, Wentao
• Schaak, Diane
• Stavitski, Eli
• Nørskov, Jens K
• Siahrostami, Samira
• Wang, Haotian

Titel

Highly selective oxygen reduction to hydrogen peroxide on transition metal single atom coordination

Ist Teil von

• Nature communications, 2019-09, Vol.10 (1), p.3997-11, Article 3997

Ort / Verlag

England: Nature Publishing Group

Erscheinungsjahr

2019

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• Shifting electrochemical oxygen reduction towards 2e pathway to hydrogen peroxide (H O ), instead of the traditional 4e to water, becomes increasingly important as a green method for H O generation. Here, through a flexible control of oxygen reduction pathways on different transition metal single atom coordination in carbon nanotube, we discovered Fe-C-O as an efficient H O catalyst, with an unprecedented onset of 0.822 V versus reversible hydrogen electrode in 0.1 M KOH to deliver 0.1 mA cm H O current, and a high H O selectivity of above 95% in both alkaline and neutral pH. A wide range tuning of 2e /4e ORR pathways was achieved via different metal centers or neighboring metalloid coordination. Density functional theory calculations indicate that the Fe-C-O motifs, in a sharp contrast to the well-known Fe-C-N for 4e , are responsible for the H O pathway. This iron single atom catalyst demonstrated an effective water disinfection as a representative application.