<P><B>Abstract</B></P> <P>Sulfur-doped CoP (S:CoP) nanoparticles are synthesized as a noble metal-free electrocatalyst <I>via</I> a novel and eco-friendly thiourea-phosphate-assisted solvothermal route. When ...
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https://www.riss.kr/link?id=A107471320
2018
-
SCOPUS,SCIE
학술저널
286-295(10쪽)
0
상세조회0
다운로드다국어 초록 (Multilingual Abstract)
<P><B>Abstract</B></P> <P>Sulfur-doped CoP (S:CoP) nanoparticles are synthesized as a noble metal-free electrocatalyst <I>via</I> a novel and eco-friendly thiourea-phosphate-assisted solvothermal route. When ...
<P><B>Abstract</B></P> <P>Sulfur-doped CoP (S:CoP) nanoparticles are synthesized as a noble metal-free electrocatalyst <I>via</I> 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, IrO<SUB>2</SUB>, 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<SUP>2</SUP> 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 IrO<SUB>2</SUB> anode.</P> <P><B>Highlights</B></P> <P> <UL> <LI> S:CoP is synthesized by eco-friendly thiourea-phosphate-assisted solvothermal route. </LI> <LI> S:CoP/NF becomes an active and stable bifunctional water splitting electrocatalyst. </LI> <LI> S-doping improves charge transfer and increases density of active sites. </LI> <LI> An alkaline electrolyzer with bifunctional S:CoP outperforms all-noble-metal electrolyzer. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>The electronic properties of CoP are modulated by doping S into its structure through an environment-friendly thiourea-phosphate route, and produced S:CoP electrocatalysts efficiently catalyze both HER and OER in alkaline media.</P> <P>[DISPLAY OMISSION]</P>