101. Porous β-Mo2C nanoparticle clusters supported on walnut shell powders derived carbon matrix for hydrogen evolution reaction.
- Author
-
Yan, Qing, Yang, Xueying, Wei, Tong, Zhou, Chunliang, Wu, Wei, Zeng, Lingzi, Zhu, Ruijie, Cheng, Kui, Ye, Ke, Zhu, Kai, Yan, Jun, Cao, Dianxue, and Wang, Guiling
- Subjects
- *
HYDROGEN evolution reactions , *PLATINUM nanoparticles , *POWDERS , *GAS flow , *CATALYST supports , *CHARGE exchange - Abstract
The Mo 2 C@C catalyst was prepared by the calcination method under the argon gas flow of the activated walnut shell-ammonium heptamolybdate hybrid powder mixture, enhancing the electrocatalytic hydrogen evolution process. • The waste walnut shell powder was chosen as the carbon source for HER catalysts. • The walnut shell powders derived carbon matrix can enhance the electron transfer. • The open pores can facilitate electrolyte permeation and hydrogen release. Herein, we choose the waste walnut shell as the carbon source, and ammonium heptamolybdate as the molybdenum source to prepare the β-Mo 2 C catalyst supported on carbon matrix (Mo 2 C@C) by the calcination method for hydrogen evolution reaction (HER). The open pores in the porous Mo 2 C nanoparticle clusters can facilitate electrolyte permeation and hydrogen molecules release as well as the carbon matrix can enhance the conductivity. As a result, the optimal Mo 2 C exhibits an efficient HER performance, with an overpotential of 140 mV at 10 mA cm−2 and a Tafel slope of 63 mV dec−1 as well as excellent electrochemical stability. The strategy changing waste walnut shell into the effective catalysts sets an example for the searching and designing rational energy materials. [ABSTRACT FROM AUTHOR]
- Published
- 2020
- Full Text
- View/download PDF