One-pot synthesis of in situ carbon-decorated Cu 3 P particles with enhanced electrocatalytic hydrogen evolution perform
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Tao Yang College of Chemical Engineering, Chongqing University, Chongqing 401331, China
Shuxia Wang and Shijian Chena) College of Physics, Chongqing University, Chongqing 401331, China (Received 5 August 2017; accepted 19 September 2017)
Developing highly efficient and low-cost electrocatalysts with robust stability for hydrogen evolution reaction (HER) is a significant but challenging work for energy conversion and storage in recent years. In the present work, in situ carbon-decorated Cu3P particles (Cu3P@C) were facially synthesized by a one-pot rapid reaction with the precursors of copper acetylacetonate [Cu(acac)2] and triphenylphosphine (PPh3) at 425 °C for 1 h via a vacuum encapsulation technique. Compared with pure Cu3P particles, the Cu3P@C hybrid catalyst exhibits an enhanced electrocatalytic water-splitting performance for hydrogen evolution with excellent stability. The investigation shows that the hybridization with carbon efficiently facilities the charge transport for the electrochemical reaction. Such results of our study make the present Cu3P@C-based hybrid a promising catalyst for practical applications toward energy conversion and pave way for designing and fast fabricating in situ carbon-decorated HER catalysts from the organometallic precursors.
I. INTRODUCTION
With the rapid consumption of fossil fuels for energy demands and increasing environment crisis, an urgent demand for clean energy sources have attracted a wide horizon of research interest over the past few years. Hydrogen has been considered an ideal and sustainable alternative source for fossil fuels for the human society owing to the highest possible energy density, renewable, and zero greenhouse gases emission properties.1–3 Among the clean-energy developing methods, electrochemical splitting of water to produce hydrogen is a promising strategy due to its low energy consumption, short reaction period, high-purity product, and environmentally friendly process. However, such methods need to seek highly efficient hydrogen evolution reaction (HER) electrocatalysts that can provide a large mediation for the reaction at a low overpotential,4–6 which represents a vital step to accelerate the development of hydrogen economy but remains challenging for now.7 Over the recent years, great efforts have been made to explore the high efficiency, low cost, and strong durability of nonprecious metal substitutes.8–10 As yet, many nonprecious metals,11,12 transition metal alloys,13–16 Contributing Editor: Xiaobo Chen a) Address all correspondence to this author. e-mail: [email protected] DOI: 10.1557/jmr.2017.401
transition-metal carbides,17–19 chalcogenides,20–24 25–27 28–30 31 nitride, oxide and borides have been widely investigated for their electrocatalytic HER properties. Even though a great deal of research work has been put in during the past few decades, the HER catalysts still face several challenging problems: (i) the catalytic performance of the most reported HER electrocatalysts are much lower than the Pt/C catalysts and need to be further
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