Phase‐Controlled Cobalt Phosphide Nanoparticles Coupled with N, P, S Co‐Doped Hollow Carbon Polyhedrons as Efficient Catalysts for Both Alkaline and Acidic Hydrogen Evolution. Issue 5 (5th April 2019)

• Record Type: Journal Article
• Authors: Li, Shuolin; Li, Hongmei; Huang, Shaowei; He, Qian; Hou, Linxi
• Is Part Of: Energy technology. Volume 7:Issue 5(2019:May)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2019-04-05
• Subjects: cobalt phosphide -- heteroatoms doping -- hollow polyhedrons -- hydrogen evolution reaction; Energy development -- Periodicals; Power resources -- Periodicals; 333.79
• DOI: 10.1002/ente.201800757
• Languages: English
• ISSNs: 2194-4288

Abstract

Abstract : Tailoring cobalt phosphide electrocatalysts with a tunable phase and morphology is of great importance for the advancement of hydrogen evolution reaction (HER). The synthesis of phase‐ and morphology‐modulated hollow cobalt phosphide nanoparticles coupled with N, P, S co‐doped carbon (Co‐P@NPS‐C) polyhedrons through a facile three‐step method is reported. Benefiting from the cooperation of structural features, heteroatoms doping, and catalytic components (Co x P, a mixture of CoP and Co2 P), the hollow Co x P@NPS‐C polyhedrons exhibit superior HER performance and long‐term stability in 1.0 m KOH solution, with a low onset potential value (18 mV), an overpotential of 80 mV at 10 mA cm −2, and a small Tafel slope of 57.6 mV dec −1 . In addition, the Co x P@NPS‐C electrodes exhibit good electrochemical properties and stability in 0.5 m H2 SO4 solution. These results suggest a novel and promising coating approach with poly(cyclotriphosphazene‐ co ‐4, 4′‐sulfonyldiphenol (PZS) to fabricate other heterogeneous catalysts for various applications. Abstract : Hollow Co‐P@NPS‐C polyhedrons are synthesized by a facile three‐step method. Their morphologies and crystal phases can be easily adjusted by altering the number of monomers. Typically, the Co x P@NPS‐C electrode exhibits superior electrocatalytic hydrogen evolution reaction activity and durability under acidic and alkaline conditions. The result suggests a novel and promising coating approach with poly(cyclotriphosphazene‐ co ‐4, 4′‐sulfonyldiphenol to fabricate other heterogeneous catalysts for various applications.