纳米晶
材料科学
过电位
化学工程
兴奋剂
多孔性
碳纤维
纳米技术
钼
催化作用
杂原子
复合材料
冶金
化学
电化学
有机化学
复合数
光电子学
电极
物理化学
工程类
戒指(化学)
作者
Ye Xiong,Ping Zhang,Zhe Wang,Chunde Jin
出处
期刊:ACS applied energy materials
[American Chemical Society]
日期:2021-12-13
卷期号:4 (12): 14432-14439
被引量:5
标识
DOI:10.1021/acsaem.1c03107
摘要
Refining the size of nonprecious metal-based catalysts and restricting them in multiheteroatom-doped hierarchical porous carbon can achieve efficient electrical energy conversion. In this study, ultrasmall Mo2C nanocrystals with an average size of 4.9 nm are fitted to N and S double-doped hierarchical porous carbon (us-Mo2C/N,S-HPC) through a template strategy and used for efficient hydrogen production. First, the metal molybdenum salt is captured and fixed by natural bamboo leaf fibers which are pulverized by a ball mill. Meanwhile, the soluble sodium salt is largely filled in the bamboo leaf tissue. Subsequently, Mo2C nanocrystals formed by high-temperature reduction are uniformly anchored on the bamboo-derived N, S double-doped hierarchical porous carbon. As a result, the prepared us-Mo2C/N,S-HPC requires 150, 197, and 148 mV overpotential to drive a current density of 10 mA cm–1 at pH = 0, 7, and 14, respectively. This improvement is attributed to the synergistic effects of size controllable Mo2C, multidoped heteroatoms, and multiscale assembly structures. Significantly, this study is conducive to the construction of ultrafine nanocrystals and the high-value conversion of waste biomass.
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