磷化物
钨
材料科学
异质结
电催化剂
氮化物
阳极
纳米技术
催化作用
电子转移
化学工程
电化学
电极
化学
光电子学
光化学
冶金
镍
图层(电子)
物理化学
工程类
生物化学
作者
Peng Wei,Zhuge Xiangqun,Quan Li,Xueping Sun,Li Chen,Kang Liang,Jiantao Han,Yurong Ren,Yunhui Huang
标识
DOI:10.1016/j.jcis.2024.02.045
摘要
As a potential catalyst for hydrogen evolution reaction (HER), tungsten nitride (W2N) has attracted extensive attention, due to its Pt-like characteristic. Nevertheless, insufficient active sites, slow electron transfer, and lack of scale-up nano-synthesis methods significantly limit its practical application. Constructing multi-component active centers and interface-rich heterojunctions to increase exposed active sites and modulate interface electrons is a very effective modification strategy. Therefore, a nano-heterostructure formed from tungsten nitride, tungsten phosphide and tungsten encapsulated in N, P co-doped carbon nanofiber (W2N/WP/W@NPC) was synthesized by a flexible and scalable electrospinning technology. Experimental results reveal that abundant heterojunctions are formed, electron transfer occurs between tungsten nitride and tungsten phosphide, and carbon nanofibers play a confinement role. The optimized W2N/WP/W@NPC-3 electrocatalyst demonstrates excellent HER catalytic activity and robust stability in both acidic and base media. Furthermore, the overall water splitting performance is tested using W2N/WP/W@NPC as the cathode through a two-electrode electrolyzer, which also exhibits impressive electrochemical performance.
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