双功能
电催化剂
析氧
分解水
材料科学
催化作用
兴奋剂
化学工程
过渡金属
电解
纳米技术
无机化学
化学
物理化学
电化学
电极
光电子学
工程类
电解质
光催化
生物化学
作者
Guowei Wang,Guikai Zhang,Xiaoxing Ke,Xiangyu Chen,Chen Xu,Yueshuai Wang,Guoyu Huang,Juncai Dong,Shengqi Chu,Manling Sui
出处
期刊:Small
[Wiley]
日期:2022-03-15
卷期号:18 (16)
被引量:58
标识
DOI:10.1002/smll.202107238
摘要
Metallic MoS2 (i.e., 1T-MoS2 ) is considered as the most promising precious-metal-free electrocatalyst with outstanding hydrogen evolution reaction (HER) performance in acidic media comparable to Pt. However, sluggish kinematics of HER in alkaline media and its inability for the oxygen evolution reaction (OER), hamper its development as bifunctional catalysts. The instability of 1T-MoS2 further impedes its applications for scaling up, calling an urgent need for simple synthesis to produce stable 1T-MoS2 . In this work, the challenge of 1T-MoS2 synthesis is first addressed using a direct one-step hydrothermal method by adopting ascorbic acid. 1T-MoS2 with flower-like morphology is obtained, and transition metals (Ni, Co, Fe) are simultaneously doped into 1T-MoS2 . Ni-1T-MoS2 achieves an enhanced bifunctional catalytic activity for both HER and OER in alkaline media, where the key role of Ni doping as single atom is proved to be essential for boosting HER/OER activity. Finally, a Ni-1T-MoS2 ||Ni-1T-MoS2 electrolyzer is fabricated, reaching a current density of 10 mA cm-2 at an applied cell voltage of only 1.54 V for overall water splitting.
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