This work was supported by the National Natural Science Foundation of China (21175129) and the National Basic Research Program of China (2011CB935800).
Carbon Nanotubes Decorated with CoP Nanocrystals: A Highly Active Non-Noble-Metal Nanohybrid Electrocatalyst for Hydrogen Evolution†
Article first published online: 20 MAY 2014
© 2014 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
Volume 126, Issue 26, pages 6828–6832, June 23, 2014
How to Cite
Liu, Q., Tian, J., Cui, W., Jiang, P., Cheng, N., Asiri, A. M. and Sun, X. (2014), Carbon Nanotubes Decorated with CoP Nanocrystals: A Highly Active Non-Noble-Metal Nanohybrid Electrocatalyst for Hydrogen Evolution. Angew. Chem., 126: 6828–6832. doi: 10.1002/ange.201404161
- Issue published online: 20 JUN 2014
- Article first published online: 20 MAY 2014
- Manuscript Received: 10 APR 2014
- National Natural Science Foundation of China. Grant Number: 21175129
- National Basic Research Program of China. Grant Number: 2011CB935800
- Heterogene Katalyse;
The development of effective and inexpensive hydrogen evolution reaction (HER) electrocatalysts for future renewable energy systems is highly desired. The strongly acidic conditions in proton exchange membranes create a need for acid-stable HER catalysts. A nanohybrid that consists of carbon nanotubes decorated with CoP nanocrystals (CoP/CNT) was prepared by the low-temperature phosphidation of a Co3O4/CNT precursor. As a novel non-noble-metal HER catalyst operating in acidic electrolytes, the nanohybrid exhibits an onset overpotential of as low as 40 mV, a Tafel slope of 54 mV dec−1, an exchange current density of 0.13 mA cm−2, and a Faradaic efficiency of nearly 100 %. This catalyst maintains its catalytic activity for at least 18 hours and only requires overpotentials of 70 and 122 mV to attain current densities of 2 and 10 mA cm−2, respectively.