过电位
塔菲尔方程
双功能催化剂
电化学
碳纤维
纳米片
钼
无机化学
制氢
作者
Jiangnan Xing,Yang Li,Siwei Guo,Ting Jin,Haixia Li,Yijing Wang,Lifang Jiao
标识
DOI:10.1016/j.electacta.2018.12.091
摘要
Abstract Developing low-cost and highly efficient electrocatalysts for hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) is attractive for overall water splitting. Herein, we firstly use the globally generated green cornstalks as the carbon source to prepare highly efficient bifunctional pure β-phase molybdenum carbide (β-Mo2C) electrocatalysts. Due to the highly intrinsic activity of β-Mo2C, high porosity of the resultant and synergistic effect between the Mo2C and carbon matrix, the as-prepared catalyst exhibits excellent electrocatalytic activities with low overpotentials of 130 mV and 274 mV to achieve a current density of 10 mA cm−2 for the HER and OER, respectively. As a bifunctional electrocatalyst for overall water splitting, the electrolyzer only needs a cell voltage of 1.65 V at 10 mA cm−2 in alkaline water, as well as long-term stability of 30 h. This intriguing preparation strategy will open up an exciting new avenue for the synthesis of other carbides.
科研通智能强力驱动
Strongly Powered by AbleSci AI