title: Efficient Water Splitting Catalyzed by Cobalt Phosphide-Based Nanoneedle Arrays Supported on Carbon Cloth.
abstract: Efficient and low-cost electrocatalysts for water splitting are essential for solar fuel production. Herein, we report that nanoarrays of CoP supported on carbon cloth are an efficient bifunctional catalyst for overall water splitting. The catalyst exhibits remarkable activity for both the oxygen evolution reaction (OER) and hydrogen evolution reaction (HER) in alkaline media, delivering a current density of 10 mA cm(-2) at an overpotential of 281 mV for OER and 95 mV for HER. During electrocatalysis, the surface of the CoP catalyst was covered with a layer of CoOx , which was the active species. However, the CoP core and the nanoarray morphology contributed significantly to the activity.
authors.affiliation: Laboratory of Inorganic Synthesis and Catalysis, Institute of Chemical Sciences and Engineering, École Polytechnique Fédérale de Lausanne (EPFL), ISIC-LSCI, BCH 3305, 1015, Lausanne, Switzerland.|Particles and Catalysis Research Group, School of Chemical Engineering, The University of New South Wales, Sydney, NSW, 2052, Australia.
authors.forename: Peng
authors.initials: P
authors.lastname: Wang
authors.affiliation: Laboratory of Inorganic Synthesis and Catalysis, Institute of Chemical Sciences and Engineering, École Polytechnique Fédérale de Lausanne (EPFL), ISIC-LSCI, BCH 3305, 1015, Lausanne, Switzerland. sofa0318@gmail.com.
authors.forename: Fang
authors.initials: F
authors.lastname: Song
authors.affiliation: Particles and Catalysis Research Group, School of Chemical Engineering, The University of New South Wales, Sydney, NSW, 2052, Australia.
authors.forename: Rose
authors.initials: R
authors.lastname: Amal
authors.affiliation: Particles and Catalysis Research Group, School of Chemical Engineering, The University of New South Wales, Sydney, NSW, 2052, Australia.
authors.forename: Yun Hau
authors.initials: YH
authors.lastname: Ng
authors.affiliation: Laboratory of Inorganic Synthesis and Catalysis, Institute of Chemical Sciences and Engineering, École Polytechnique Fédérale de Lausanne (EPFL), ISIC-LSCI, BCH 3305, 1015, Lausanne, Switzerland. xile.hu@epfl.ch.
authors.forename: Xile
authors.initials: X
authors.lastname: Hu
mesh_terms: D002244:Carbon / Q000737:chemistry*; D002384:Catalysis; D003035:Cobalt / Q000737:chemistry*; D008855:Microscopy, Electron, Scanning; D014867:Water / Q000737:chemistry*; D014961:X-Ray Diffraction
chemical_list: D014867:Water; D003035:Cobalt; D002244:Carbon
keywords: cobalt phosphide; electrocatalysts; hydrogen evolution; nanoarrays; oxygen evolution