Bifunctional sulfur-doped cobalt phosphide electrocatalyst outperforms all-noble-metal electrocatalysts in alkaline electrolyzer for overall water splitting

被引：211

作者：

Anjum, Mohsin Ali Raza ^{[1
,2
]}

Okyay, Mahmut Sait ^{[3
]}

Kim, Minkyung ^{[1
]}

Lee, Min Hee ^{[1
]}

Park, Noejung ^{[4
]}

Lee, Jae Sung ^{[1
]}

机构：

[1] Ulsan Natl Inst Sci & Technol UNIST, Sch Energy & Chem Engn, Dept Energy Engn, 50 UNIST Gil, Ulsan 44919, South Korea

[2] Pakistan Inst Nucl Sci & Technol PINSTECH, Div Chem, Directorate Sci, PO Nilore, Islamabad 45650, Pakistan

[3] Ulsan Natl Inst Sci & Technol UNIST, Phys, 50 UNIST Gil, Ulsan 44919, South Korea

[4] Ulsan Natl Inst Sci & Technol UNIST, Interdisciplinary Sch Green Energy, 50 UNIST Gil, Ulsan 44919, South Korea

来源：

NANO ENERGY | 2018年 / 53卷

关键词：

Cobalt phosphide; S-doping; Bifunctional water-splitting electrocatalysts; DFT calculations; Urea-phosphate route; MOLYBDENUM CARBIDE; HIGH-PERFORMANCE; BCN NETWORK; EFFICIENT; HYDROGEN; CATALYSTS; ARRAYS;

D O I：

10.1016/j.nanoen.2018.08.064

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：

Sulfur-doped CoP (S:CoP) nanoparticles are synthesized as a noble metal-free electrocatalyst via a novel and eco-friendly thiourea-phosphate-assisted solvothermal route. When used as a bifunctional electrocatalyst for the hydrogen and oxygen evolution reactions from water splitting in an alkaline solution, the electrode exhibits excellent activity and stability outperforming noble mental-based Pt/C, IrO2, and reported non-noble metal-based electrocatalysts. Density functional theory calculations indicate that the excellent performance is attributable to the improved charge-transfer characteristics of the S:CoP nanoparticles owing to their modified electronic structure. It also increases the number of exposed active sites especially on the conductive substrates. A bifunctional S:CoP catalyst-based alkaline electrolyzer for overall water splitting exhibits a stable current density of 100 mA/cm(2) at an overvoltage of 0.55 V during a long-term operation; this performance is superior to that obtained from all-noble metal electrolyzer with a Pt/C cathode and an IrO2 anode.

引用

页码：286 / 295

页数：10

共 37 条

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