Sulfide interlayered cobalt-based oxynitrides for efficient oxygen evolution reaction in neutral pH water and seawater

被引：30

作者：

Badreldin, Ahmed ^{[1
]}

Abed, Jehad ^{[2
,3
]}

Hassan, Noor ^{[1
]}

El-Ghenymy, Abdellatif ^{[1
]}

Suwaileh, Wafa ^{[1
]}

Wubulikasimu, Yiming ^{[1
]}

Ghouri, Zafar Khan ^{[5
]}

Youssef, Karim ^{[4
]}

Kumar, Dharmesh ^{[4
]}

Elsaid, Khaled ^{[1
]}

Sargent, Edward H. ^{[2
]}

Abdel-Wahab, Ahmed ^{[1
]}

机构：

[1] Texas A&M Univ Qatar, Chem Engn Program, Doha 23874, Qatar

[2] Univ Toronto, Dept Elect & Comp Engn, Toronto, ON M5S 3G4, Canada

[3] Univ Toronto, Dept Mat Sci & Engn, Toronto, ON M5S 3E4, Canada

[4] Qatar Shell Res & Technol Ctr, PO 3747, Doha, Qatar

[5] Univ Karachi, HEJ Res Inst Chem, Int Ctr Chem & Biol Sci, Karachi 75270, Pakistan

来源：

APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY | 2023年 / 330卷

关键词：

Impure water electrolysis; Electrochemical water oxidation; Oxygen evolution reaction; Neutral pH water electrolysis; Seawater electrolysis; ELECTROLYSIS; METAL; ELECTROCATALYSTS; DESIGN; OXIDATION; ALKALINE; KINETICS; HYDROGEN; LAYER;

D O I：

10.1016/j.apcatb.2023.122599

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：

Sluggish kinetics of the anodic oxygen evolution reaction (OER) and minor upstream upsets in feed water quality remain bottlenecks for efficient water electrolysis, which is exacerbated under near-neutral pH environments due to H2O dissociation. In this work, we report the introduction of a NiSx interlayer in a Co-(NiFe) oxide/nitride catalyst on nickel foam substrate. Postmortem OER characterization in neutral pH synthetic seawater (SSW) shows that stable cationic [Co-(NiFe)]& delta;+ and anionic [O-N]& delta;- surface species coupled with the NiSx interlayer accelerate H2O dissociation, thereby enhancing activity and kinetics. The electrocatalysts exhibit stable performance at 100 mA cm-2 for 50 h in alkaline and neutral pH SSW with 350 and 425 mV of overpotential, respectively. The faradaic efficiency of the NiSx interlayer catalysts is enhanced by 10.3% and 8.5% achieving 94.5% and 87.4% under alkaline and neutral pH SSW, respectively, during chronoamperometry tests at a high applied voltage of 1.75 V (vs. RHE).

引用

页数：14

共 58 条

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