阴极
原位
纳米颗粒
膜
材料科学
嵌入
化学工程
碳化
纳米技术
化学
有机化学
复合材料
物理化学
计算机科学
工程类
扫描电子显微镜
人工智能
生物化学
作者
Fang Wang,Wanan Deng,Yanan Li,Shixiong Min,Zhengguo Zhang
出处
期刊:Dalton Transactions
[The Royal Society of Chemistry]
日期:2020-01-01
卷期号:49 (25): 8557-8565
被引量:17
摘要
A rational design of active, stable, and pH-compatible electrocatalysts is crucial to produce high-purity H2via an electrocatalytic water splitting reaction. Herein, we report a carbonized wood membrane (CWM) embedded with Mo2C/MoO3-x nanoparticles (denoted as MCWM) as an efficient and stable self-supported H2 evolution cathode in both acidic and alkaline solutions. The CWM features a high surface area with numerous aligned and open channels and abundant porosity, greatly facilitating electrolyte transport and gas release. The in situ embedded Mo2C/MoO3-x nanoparticles are uniformly dispersed throughout the entire framework of the CWM, providing abundant active sites. These structural synergies endow the as-fabricated MCWM electrodes with excellent electrocatalytic H2 evolution activity, and the optimal MCWM electrode requires overpotentials of 187 and 275 mV to achieve a current density of 10 mA cm-2 in 0.5 M H2SO4 and 1.0 M KOH, respectively. Moreover, the MCWM electrode exhibits superior H2 evolution stability at a high current density of 80 mA cm-2 in both solutions with nearly 100% faradaic efficiencies. This work provides a promising nature-inspired strategy for the development of self-supported and pH-compatible electrodes for large-scale electrocatalytic H2 evolution reactions.
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