Dual-doping NiMoO4 with multi-channel structure enable urea-assisted energy-saving H2 production at large current density in alkaline seawater

被引：187

作者：

Guo, Lili ^{[1
]}

Chi, Jingqi ^{[1
,2
]}

Zhu, Jiawei ^{[1
,2
]}

Cui, Tong ^{[1
]}

Lai, Jianping ^{[1
]}

Wang, Lei ^{[1
,3
]}

机构：

[1] Qingdao Univ Sci & Technol, Coll Chem & Mol Engn, Key Lab Ecochem Engn, Minist Educ,Int Sci & Technol Cooperat Base Ecoche, Qingdao 266042, Peoples R China

[2] Qingdao Univ Sci & Technol, Coll Chem Engn, Qingdao 266042, Peoples R China

[3] Qingdao Univ Sci & Technol, Coll Environm & Safety Engn, Qingdao 266042, Peoples R China

来源：

APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY | 2023年 / 320卷

基金：

中国国家自然科学基金;

关键词：

Ru; P-NiMoO 4 @NF multi -channel nanorods; Seawater splitting; Urea oxidation reaction; Energy -saving hydrogen production; HYDROGEN EVOLUTION; OXYGEN EVOLUTION; EFFICIENT; CATALYST; WATER; LDH;

D O I：

10.1016/j.apcatb.2022.121977

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Seawater electrolysis is an efficient method for producing carbon-neutral hydrogen; however, it is hindered by high energy cost and chlorine evolution reaction. In this study, we report Ru, P dual-doped NiMoO4 multichannel nanorods in-situ grown on nickel foam (Ru/P-NiMoO4 @NF), which can achieve chlorine-free hydrogen production by coupling seawater splitting with thermodynamically favorable urea oxidation. The Ru/P-NiMoO4 @NF exhibits bifunctional activity with working potentials of 0.23 V to deliver 3000 mA cm-2 for HER and 1.46 V to deliver 1000 mA cm-2 for UOR. The overall urea splitting system in the two-electrode electrolyzer require low voltage of 1.73 V to drive 500 mA cm-2, and demonstrate remarkable durability to keep above 100 mA cm-2 for 145 h. Density functional theory calculations reveal that dual-doping modulate the D-band center of catalyst, thus enhancing the adsorption of reactants and intermediates. This work provides information for designing catalysts for combing seawater splitting with urea purification.

引用

页数：10

共 63 条

[1] Tuning the Intermolecular Electron Transfer of Low-Dimensional and Metal-Free BCN/C60 Electrocatalysts via Interfacial Defects for Efficient Hydrogen and Oxygen Electrochemistry [J].