title: Electrodeposited cobalt-phosphorous-derived films as competent bifunctional catalysts for overall water splitting.
abstract: One of the challenges to realize large-scale water splitting is the lack of active and low-cost electrocatalysts for its two half reactions: H2 and O2 evolution reactions (HER and OER). Herein, we report that cobalt-phosphorous-derived films (Co-P) can act as bifunctional catalysts for overall water splitting. The as-prepared Co-P films exhibited remarkable catalytic performance for both HER and OER in alkaline media, with a current density of 10 mA cm(-2) at overpotentials of -94 mV for HER and 345 mV for OER and Tafel slopes of 42 and 47 mV/dec, respectively. They can be employed as catalysts on both anode and cathode for overall water splitting with 100% Faradaic efficiency, rivalling the integrated performance of Pt and IrO2. The major composition of the as-prepared and post-HER films are metallic cobalt and cobalt phosphide, which partially evolved to cobalt oxide during OER.
authors.affiliation: Department of Chemistry and Biochemistry, Utah State University, 0300 Old Main Hill, Logan, UT 84322 (USA) http://www.yujiesun.org.
authors.forename: Nan
authors.initials: N
authors.lastname: Jiang
authors.affiliation: Department of Chemistry and Biochemistry, Utah State University, 0300 Old Main Hill, Logan, UT 84322 (USA) http://www.yujiesun.org.
authors.forename: Bo
authors.initials: B
authors.lastname: You
authors.affiliation: Department of Chemistry and Biochemistry, Utah State University, 0300 Old Main Hill, Logan, UT 84322 (USA) http://www.yujiesun.org.
authors.forename: Meili
authors.initials: M
authors.lastname: Sheng
authors.affiliation: Department of Chemistry and Biochemistry, Utah State University, 0300 Old Main Hill, Logan, UT 84322 (USA) http://www.yujiesun.org. yujie.sun@usu.edu.
authors.forename: Yujie
authors.initials: Y
authors.lastname: Sun
keywords: electrocatalysts; nonprecious metal catalysts; overall water splitting; potentiodynamic deposition