Evolution of interfacial coupling interaction of Ni-Ru species for pH-universal water splitting

被引:51
作者
Jin, Wei [1 ]
Wu, Hengbo [1 ]
Cai, Weiquan [3 ]
Jia, Baohua [4 ]
Batmunkh, Munkhbayar [5 ]
Wu, Zexing [2 ]
Ma, Tianyi [4 ]
机构
[1] Tongji Univ, Sch Environm Sci & Engn, State Key Lab Pollut Control & Resources Reuse, 1239 Siping Rd, Shanghai 200092, Peoples R China
[2] Qingdao Univ Sci & Technol, Coll Chem & Mol Engn, State Key Lab Base Ecochem Engn, Qingdao 266042, Peoples R China
[3] Guangzhou Univ, Sch Chem & Chem Engn, 230 Guangzhou Univ City Outer Ring Rd, Guangzhou 510006, Peoples R China
[4] Swinburne Univ Technol, Ctr Translat Atomat, Fac Sci Engn & Technol, John St, Hawthorn, Vic 3122, Australia
[5] Griffith Univ, Ctr Clean Environm & Energy, Gold Coast, Qld 4222, Australia
基金
中国博士后科学基金;
关键词
NiRu alloy; Electrocatalysis; Water-splitting; Wide pH value; Sustainable energy; BIMETALLIC ELECTROCATALYSTS; CONTROLLABLE SYNTHESIS; EFFICIENT; OXYGEN; MODULATION; CATALYST;
D O I
10.1016/j.cej.2021.130762
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
Designing highly-efficient and pH-universal electrocatalysts for overall water-splitting reactions is important for the sustainable production of hydrogen. Herein, NiRu nanoparticles encapsulated into N-doped carbon (NiRu@NC) are fabricated with the assistance of MOF for hydrogen evolution reaction (HER) and also evolved into core-shell structured nanomaterials with abundant interfaces for oxygen evolution reaction (OER, Ni/RuOx@C). Benefiting from optimized electronic structure, interfacial synergy effect and special core-shell structure (similar to 150 nm), the newly developed electrocatalysts present remarkable electrocatalytic activities with small over-potentials to drive 10 mA cm(-2) for the HER (19 mV in alkaline, 80 mV in neutral, 20 mV in acid) and OER (252 mV, 316 mV, 211 mV). Moreover, the obtained electrocatalysts exhibit outstanding catalytic performances for overall water-splitting in a two-electrode system with 1.53 V and 1.67 V to drive 10 mA cm(-2) in basic and neutral electrolyte, respectively. Remarkably, a small potential of 1.47 V is required to deliver 10 mA cm(-2) in acidic media and no significant decay of the activity is observed. This work paves the way for designing a novel class of electrocatalyst that can not only exhibit remarkable electrocatalytic water splitting performances in various conditions, but also possess excellent stabilities for future generation of clean energy.
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页数:11
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