过电位
电催化剂
析氧
双功能
分解水
催化作用
磷化物
化学工程
双功能催化剂
材料科学
电解
锌
无机化学
制氢
纳米棒
化学
纳米技术
电化学
电极
冶金
光催化
物理化学
生物化学
工程类
电解质
作者
Kha Thuy Nhi Le,Van Hien Hoa,Huu Tuan Le,Duy Thanh Tran,Nam Hoon Kim,Joong Hee Lee
标识
DOI:10.1016/j.apsusc.2022.154206
摘要
Herein, a heterostructured electrocatalyst derived from ultrasmall iridium (3.85 wt%)-based clusters (IrOx) integrated zinc phosphide (Zn3P2)-zinc phosphate (ZnPi) nanosheets (NSs) is rationally fabricated by a facile approach. The IrOx/Zn3P2-ZnPi NSs catalyst possesses efficient catalytic activities and prospective stability due to its large electroactive surface area, excellent charge transfer, high mechanical properties of the structure, and good catalyst-substrate interactions. As a result, the IrOx/Zn3P2-ZnPi NSs catalyst exhibits an overpotential of 106 mV for hydrogen evolution reaction (HER) and 286 mV for oxygen evolution reaction (OER) to reach a current output of 10 mA cm−2 in 1.0 M KOH medium, which are significantly lower than those of the IrOx/Zn3P2-ZnPi nanorods (NRs) and previously reported bifunctional electrocatalysts. An electrolyzer derived from the IrOx/Zn3P2-ZnPi NSs(+,-) requires a small cell voltage of 1.62 V at 10 mA cm−2 and 1.84 V at 100 mA cm−2, surpassing behaviors of a commercial Pt/C(-)//IrO2(+) system. The results indicate that the IrOx/Zn3P2-ZnPi NSs is a potential bifunctional electrocatalyst for efficient water splitting application to produce green hydrogen fuel.
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