Abstract
Developing integrated non-noble metal electrocatalysts with mass activity comparable to noble metal is a significant challenge for overall water splitting. Herein, we constructed an integrated amorphous cobalt phosphoselenide (a-CoPSe) electrode via amorphization and dual anion-mediated strategy, achieving a significant improvement in the electrochemical active surface area (ECSA) and turnover frequency (TOF). The a-CoPSe offers large ECSA (65.9 m2 g−1) and high TOF values of 35.7 s−1 for hydrogen evolution reaction (HER) and 31.9 s−1 for oxygen evolution reaction (OER) at 300 mV. The mass activities of a-CoPSe are 890.4 A g−1Co for HER at 300 mV and 677.4 A g−1Co for OER at 250 mV, which are comparable to commercial Pt/C (10014.6 A g−1) and RuO2 (232.6 A g−1). Theoretical calculation reveals amorphous cobalt with balanced charges regulated by phosphorus and selenium atoms simultaneously facilitate H2O* , H* , OH* and OOH* adsorption, which greatly promotes the HER and OER kinetics.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
