1D Composite Nanorods of Cobalt Phosphide‐Cobalt Sulfide with Improved Electrocatalyst Performance

Abstract

Efficient electrocatalysts of cobalt phosphide-cobalt sulfide 1D composite nanorods for hydrogen evolution reaction (HER) are synthesized by heat-treatment of cobalt phosphide nanorod under CS 2 flow. The reaction of cobalt phosphide with CS 2 molecule leads to the formation of CoPÀ CoS composite with the maintenance of original 1D nanorod morphology. In comparison with the pristine CoP nanorod, the CoPÀ CoS composite nanorod shows much higher HER electrocatalytic activity with much lower overpotential, highlighting the beneficial effect of composite formation with metal sulfide on electrocatalyst performance of metal phosphide. The composite formation with CoS domain results in the remarkable enhancement of HER kinetics, electrochemical active surface area, and charge transfer kinetics, which is mainly responsible for the enhanced electrocatalytic activity of composite nanorod. The present study underscores that hybridization with metal sulfide can provide an efficient methodology to improve the electrocatalyst functionality of metal phosphide.[a] H.

Recyclable Endogenous H2S Activation of Self‐Assembled Nanoprobe with Controllable Biodegradation for Synergistically Enhanced Colon Cancer‐Specific Therapy

“…Moreover, the peaks of S element at 162.0 and 163.2 eV correspond to S 2p3/2 and S 2p1/2, respectively, indicating the formation of sulfide (Figure S4 , Supporting Information and Figure 1I ). [ 41 ] Besides, the peaks of S element at 168.5 and 169.6 eV can be attributed to the S—O bonds formed by the surface oxidation of POM‐CoS. [ 42 ] These characterizations further confirmed the phase and structure conversion of POM‐Co to POM‐CoS.…”

Innovative Catalyst Design of Sea-Urchin-like NiCoP Nanoneedle Arrays Supported on N-Doped Carbon Nanospheres for Enhanced HER Performance

“…22 Ni 0 Co 2 P@NCSs exhibit diffraction peaks at 31.6, 36.3, 46.2, 48.1, 48.4, and 56.8, matching the (011), ( 111), ( 112), ( 211), (202), and (301) lattice planes of CoP (JCPDS #29-0497). 23 The wide peaks around 26°in Ni 0.5 Co 1.5 P@NCSs and NCSs materials (Figure S3) correspond to the structures of C (JCPDS #75-0444). 24 The electrocatalytic potential of the material can be evaluated by taking into account its specific surface area, which is considered as a crucial parameter.…”

Singlet oxygen synergistic surface-adsorbed hydroxyl radicals for phenol degradation in CoP catalytic photo-Fenton

“…S7). The analysis results show that there was an oxide layer on the CoP surface [23,24]. Thereafter, the composition of the CoP surface was further analyzed via infrared and Raman spectra.…”