title: An efficient ternary CoP2xSe2(1-x)nanowire array for overall water splitting.
abstract: Developing earth-abundant and efficient bifunctional electrocatalysts for realizing the hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) under alkaline conditions is an intriguing challenge. Here, ternary necklace-like CoP2xSe2(1-x)nanowire arrays are synthesized via simultaneously phosphorizing and selenizing Co(OH)2nanowires. Owing to the substitution of the P atom in the ternary system, the optimal electronic structure of CoP2xSe2(1-x)can be obtained and the stability can also be enhanced for hydrogen evolution. Thus, the ternary CoP2xSe2(1-x)NWs are highly active for electrochemical hydrogen evolution in both acidic and alkaline media, achieving a current density of 10 mA cm-2at overpotentials of 70 mV and 98 mV, respectively. To realize the overall water splitting, we further performed the experiment using the CoP2xSe2(1-x)NWs as a cathode and Co(OH)2NWs as an anode, which requires a cell voltage of 1.65 V to afford a water splitting current density of 10 mA cm-2in strong alkaline media (1.0 M KOH).
authors.affiliation: CAS Center for Excellence in Nanoscience, CAS Key Laboratory of Nanosystem and Hierarchical Fabrication National Center for Nanoscience and Technology, Beijing 100190, China. hej@nanoctr.cn and University of Chinese Academy of Science, No. 19A Yuquan Road, Beijing 100049, China and Sino-Danish Center for Education and Research, Beijing, 100190, China.
authors.forename: Kaili
authors.initials: K
authors.lastname: Liu
authors.affiliation: CAS Center for Excellence in Nanoscience, CAS Key Laboratory of Nanosystem and Hierarchical Fabrication National Center for Nanoscience and Technology, Beijing 100190, China. hej@nanoctr.cn and University of Chinese Academy of Science, No. 19A Yuquan Road, Beijing 100049, China.
authors.forename: Fengmei
authors.initials: F
authors.lastname: Wang
authors.affiliation: CAS Center for Excellence in Nanoscience, CAS Key Laboratory of Nanosystem and Hierarchical Fabrication National Center for Nanoscience and Technology, Beijing 100190, China. hej@nanoctr.cn and University of Chinese Academy of Science, No. 19A Yuquan Road, Beijing 100049, China.
authors.forename: Tofik Ahmed
authors.initials: TA
authors.lastname: Shifa
authors.affiliation: CAS Center for Excellence in Nanoscience, CAS Key Laboratory of Nanosystem and Hierarchical Fabrication National Center for Nanoscience and Technology, Beijing 100190, China. hej@nanoctr.cn.
authors.forename: Zhenxing
authors.initials: Z
authors.lastname: Wang
authors.affiliation: CAS Center for Excellence in Nanoscience, CAS Key Laboratory of Nanosystem and Hierarchical Fabrication National Center for Nanoscience and Technology, Beijing 100190, China. hej@nanoctr.cn and University of Chinese Academy of Science, No. 19A Yuquan Road, Beijing 100049, China.
authors.forename: Kai
authors.initials: K
authors.lastname: Xu
authors.affiliation: CAS Center for Excellence in Nanoscience, CAS Key Laboratory of Nanosystem and Hierarchical Fabrication National Center for Nanoscience and Technology, Beijing 100190, China. hej@nanoctr.cn.
authors.forename: Yu
authors.initials: Y
authors.lastname: Zhang
authors.affiliation: CAS Center for Excellence in Nanoscience, CAS Key Laboratory of Nanosystem and Hierarchical Fabrication National Center for Nanoscience and Technology, Beijing 100190, China. hej@nanoctr.cn and School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China.
authors.forename: Zhongzhou
authors.initials: Z
authors.lastname: Cheng
authors.affiliation: CAS Center for Excellence in Nanoscience, CAS Key Laboratory of Nanosystem and Hierarchical Fabrication National Center for Nanoscience and Technology, Beijing 100190, China. hej@nanoctr.cn.
authors.forename: Xueying
authors.initials: X
authors.lastname: Zhan
authors.affiliation: CAS Center for Excellence in Nanoscience, CAS Key Laboratory of Nanosystem and Hierarchical Fabrication National Center for Nanoscience and Technology, Beijing 100190, China. hej@nanoctr.cn.
authors.forename: Jun
authors.initials: J
authors.lastname: He