Polyoxometalate and Resin‐Derived P‐Doped Mo2C@N‐Doped Carbon as a Highly Efficient Hydrogen‐Evolution Reaction Catalyst at All pH Values |
| |
Authors: | Dr Gang Yan Dr Xiaojia Feng Dr Shifa Ullah Khan Dr Liguang Xiao Wenguang Xi Dr Huaqiao Tan Dr Yuanyuan Ma Dr Lunan Zhang Prof Yangguang Li |
| |
Institution: | 1. Key Laboratory of Polyoxometalate Science of Ministry of Education, Faculty of Chemistry, Northeast Normal University, Changchun, P.?R. China;2. College of Material Science and Engineering, Jilin Jianzhu University, P.?R. China;3. College of Science, Shenyang Agricultural University, P.?R. China |
| |
Abstract: | A new type of P‐doped Mo2C coated by N‐doped carbon (P‐Mo2C@NC) has been successfully prepared by calcining a mixture of H3PMo12O40] polyoxometalates (POMs) and urea‐formaldehyde resin under an N2 atmosphere. Urea‐formaldehyde resin not only serves as the carbon source to ensure carbonization but also facilitates the uniform distribution of POM precursors, which efficiently avoid the aggregation of Mo2C particles at high temperatures. TEM analysis revealed that the average diameter of the Mo2C particles was about 10 nm, which is coated by a few‐layer N‐doped carbon sheet. The as‐prepared P‐Mo2C@NC displayed excellent hydrogen‐evolution reaction (HER) performance and long‐term stability in all pH environments. To reach a current density of 10 mA cm?2, only 109, 159, and 83 mV were needed for P‐Mo2C@NC in 0.5 m H2SO4 (pH 0), 0.1 m phosphate buffer (pH 7), and 1 m KOH (pH 14), respectively. This could provide a high‐yield and low‐cost method to prepare uniform nanosized molybdenum carbides with highly efficient and stable HER performance. |
| |
Keywords: | carbides electrochemistry hydrogen evolution molybdenum polyoxometalates |
|
|