Affiliation:
1. State Key Laboratory Base for Eco‐chemical Engineering College of Chemical Engineering Qingdao University of Science and Technology Qingdao 266042 China
2. Key Laboratory of Rubber‐Plastics Ministry of Education/Shandong Provincial Key Laboratory of Rubber‐plastics Qingdao University of Science & Technology Qingdao Shandong 266042 China
Abstract
AbstractConstructing I single‐atom (ISA) doped CoP electrocatalyst for HER is extremely challenging and has not been reported to date. Herein, an ISA doping‐phosphatization strategy is proposed to prepare a novel I single‐atom doped P‐rich CoPn nanocluster@CoP electrocatalyst (ISA‐CoPn/CoP) with enhanced HER performance first. ISA‐CoPn/CoP shows a low overpotential of only 44 and 81 mV in 0.5 m H2SO4 solution, to drive a current density of 10 and 100 mA cm−2. ISA and P‐rich CoPn nanocluster show unique synergies, which can optimize the H adsorption energy and accelerate the kinetics of HER in the CoP system. The intermediate I─H bond vibration peak is directly observed through in situ Raman testing, demonstrating that ISA doping helps accelerate the HER process. Additionally, the ΔGH of ISA‐CoPn/CoP is only 0.05 eV by density functional theory (DFT) calculation, which is conducive to H2 evolution.
Funder
Natural Science Foundation of Shandong Province
Joint Fund of the National Natural Science Foundation of China and the Karst Science Research Center of Guizhou Province