Highly selective oxygen reduction to hydrogen peroxide on transition metal single atom coordination
By Kun Jiang, Seoin Back, A. Akey, Chuan Xia, Yongfeng Hu, Wentao Liang, D. Schaak, Eli Stavitski, Jens K. Nørskov, Samira Siahrostami and 1 more. Nature Communications, 2019
607 citations recorded by the source corpus.
Shifting electrochemical oxygen reduction towards 2e– pathway to hydrogen peroxide (H2O2), instead of the traditional 4e– to water, becomes increasingly important as a green method for H2O2 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 H2O2 catalyst, with an unprecedented onset of 0.822 V versus reversible hydrogen electrode in 0.1 M KOH to deliver 0.1 mA cm−2 H2O2 current, and a high H2O2 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 H2O2 pathway. This iron single atom catalyst demonstrated an effective water disinfection as a representative application. Hydrogen peroxide can be produced alternatively using green inputs such as air, water, and sunlight but this requires a selective catalyst. Here the authors report an iron single atom catalyst that can convert oxygen into hydrogen peroxide with a selectivity of above 95% in both alkaline and neutral pH.
Subfields: Electrical and Electronic Engineering, Electrochemistry, Renewable Energy, Sustainability and the Environment
View Paper: https://www.semanticscholar.org/paper/73081a8a4180c1cedcabe306f48170b81b16fedf
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Citations in the corpus
- Insights into Practical-Scale Electrochemical H2O2 Synthesis (2020, background): “Recently, Wang and colleagues demonstrated that single atoms guide the ORR pathways with a full range control from the 2e pathway to H2O2 toward the 4e – pathway to H2O [73].”