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康振辉教授课题组及其合作者在Adv. Mater.上发表论文
发布时间:2022-09-13 点击:10

题目:

Composition Engineering of Amorphous Nickel Boride Nanoarchitectures Enabling Highly Efficient Electrosynthesis of Hydrogen Peroxide

作者:

Jie Wu1,#, Meilin Hou2,#, Ziliang Chen1,3,*, Weiju Hao4, Xuelei Pan5, Hongyuan Yang3, Wanglai Cen5,6, Yang Liu1,*, Hui Huang1, Prashanth W. Menezes3,7,*, and Zhenhui Kang1,*

单位:

1Institute of Functional Nano and Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices, Soochow University, Suzhou 215123, P. R. China

2College of Engineering, Hebei Normal University, Shijiazhuang 050024, P. R. China

3Department of Chemistry: Metalorganics and Inorganic Materials, Technische Universit?t Berlin, Stra?e des 17 Juni 135, Sekr. C2, 10623 Berlin, Germany

4State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan, 430070 P. R. China

5Institute of New Energy and Low Carbon Technology, Sichuan University, Chengdu, 610065 P. R. China

6College of Science, University of Shanghai for Science and Technology, Shanghai, 200093 P. R. China

7Material Chemistry Group for Thin Film Catalysis–CatLab, Helmholtz-Zentrum Berlin für Materialien und Energie, Albert-Einstein-Str. 15, 12489 Berlin, Germany

摘要:

Developing advanced electrocatalysts with exceptional two electron (2e?) selectivity, activity, and stability is crucial for driving the oxygen reduction reaction (ORR) to produce hydrogen peroxide (H2O2). Herein, a composition engineering strategy is proposed to flexibly regulate the intrinsic activity of amorphous nickel boride nanoarchitectures for efficient 2e? ORR by oriented reduction of Ni2+ with different amounts of BH4?. Among borides,the amorphous NiB2 delivers the 2e? selectivity close to 99% at 0.4 V and over 93% in a wide potential range, together with a negligible activity decay under prolonged time. Notably, an ultrahigh H2O2 production rate of 4.753 mol gcat?1 h?1 is achieved upon assembling NiB2 in the practical gas diffusion electrode. The combination of X-ray absorption and in situ Raman spectroscopy, as well as transient photovoltage measurements with density functional theory, unequivocally reveal that the atomic ratio between Ni and B induces the local electronic structure diversity, allowing optimization of the adsorption energy of Ni toward *OOH and reducing of the interfacial charge transfer kinetics to preserve the O?O bond.

影响因子:

30.849

分区情况:

一区

链接:

https://onlinelibrary.wiley.com/doi/10.1002/adma.202202995

 

责任编辑:郭佳



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