Amorphous Mo-doped NiS0.5Se0.5 Nanosheets@Crystalline NiS0.5Se0.5 Nanorods for High Current-density Electrocatalytic Water Splitting in Neutral Media

被引：188

作者：

Wang, Yang ^{[1
]}

Li, Xiaopeng ^{[5
]}

Huang, Zhong ^{[4
]}

Wang, Haozhi ^{[1
]}

Chen, Zelin ^{[1
]}

Zhang, Jinfeng ^{[2
,3
]}

Zheng, Xuerong ^{[1
]}

Deng, Yida ^{[1
,2
,3
]}

Hu, Wenbin ^{[2
,3
]}

机构：

[1] Hainan Univ, Sch Mat Sci & Engn, State Key Lab Marine Resource Utilizat South China, Haikou 570228, Peoples R China

[2] Tianjin Univ, Sch Mat Sci & Engn, Tianjin Key Lab Composite & Funct Mat, Tianjin 300072, Peoples R China

[3] Tianjin Univ, Key Lab Adv Ceram & Machining Technol, Minist Educ, Tianjin 300072, Peoples R China

[4] Hainan Univ, Coll Informat & Commun Engn, State Key Lab Marine Resource Utilizat South China, Haikou 570228, Peoples R China

[5] Tianjin Chengjian Univ, Sch Mat Sci & Engn, Tianjin Key Lab Bldg Green Funct Mat, Tianjin 300384, Peoples R China

来源：

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION | 2023年 / 62卷 / 06期

基金：

中国国家自然科学基金;

关键词：

Amorphous; Crystalline; High-Current-Density; Neutral Environment; Water Splitting; OXYGEN EVOLUTION; HYDROGEN EVOLUTION; AMORPHIZATION; NANOPARTICLES; PERFORMANCE; CATALYST; FOAM;

D O I：

10.1002/anie.202215256

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

It is vitally important to develop highly active, robust and low-cost transition metal-based electrocatalysts for overall water splitting in neutral solution especially at large current density. In this work, amorphous Mo-doped NiS0.5Se0.5 nanosheets@crystalline NiS0.5Se0.5 nanorods (Am-Mo-NiS0.5Se0.5) was synthesized using a facil one-step strategy. In phosphate buffer saline solution, the Am-Mo-NiS0.5Se0.5 shows tiny overpotentials of 48 and 209 mV for hydrogen evolution reaction (HER), 238 and 514 mV for oxygen evolution reaction (OER) at 10 and 1000 mA cm(-2), respectively. Moreover, Am-Mo-NiS0.5Se0.5 delivers excellent stability for at least 300 h without obvious degradation. Theoretical calculations revealed that the Ni sites in the defect-rich amorphous structure of Am-Mo-NiS0.5Se0.5 owns higher electron state density and strengthened the binding energy of H2O, which will optimize H adsorption/desorption energy barriers and reduce the adsorption energy of OER determining step.

引用

页数：11

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