Experimental and Theoretical Insights into Transition-Metal (Mo, Fe) Codoping in a Bifunctional Nickel Phosphide Microsphere Catalyst for Enhanced Overall Water Splitting
- Title
- Experimental and Theoretical Insights into Transition-Metal (Mo, Fe) Codoping in a Bifunctional Nickel Phosphide Microsphere Catalyst for Enhanced Overall Water Splitting
- Author
- 이상욱
- Keywords
- transition-metal-codoped nickel phosphide; electrodeposition; oxygen evolution reaction; hydrogen evolution reaction; overall water splitting
- Issue Date
- 2021-12
- Publisher
- AMER CHEMICAL SOC
- Citation
- ACS APPLIED ENERGY MATERIALS, v. 4, NO 12, Page. 14169-14179
- Abstract
- The facile synthesis of efficient non-precious-metal-based bifunctional catalysts for overall water splitting is highly desirable from both industrial and environmental perspectives. This study reports the electrodeposition and characterization of a transition-metal (Mo, Fe)-codoped nickel phosphide (Ni3P:FeMo) bifunctional catalyst for enhanced overall water splitting in an alkaline medium. The Ni3P:FeMo catalyst exhibited outstanding electrocatalytic performance for both the hydrogen evolution reaction and oxygen evolution reaction with low overpotentials of -103 and 290 mV, respectively, at a high current density of 100 mA/cm(2) along with fast electrocatalytic kinetics. A full water-splitting electrolyzer consisting of a bifunctional Ni3P:FeMo catalyst required a low cell voltage of 1.48 V to attain a current density of 10 mA/cm(2) with excellent stability for more than 50 h. Density functional theory calculations provided insights into the microscopic mechanism of the effective modulation of the p- and d-band centers of the P and Ni active sites by the Mo and Fe codoping of Ni3P, thereby enhancing the bifunctional catalytic activity of Ni3P.
- URI
- https://pubs.acs.org/doi/10.1021/acsaem.1c02930https://repository.hanyang.ac.kr/handle/20.500.11754/172335
- ISSN
- 25740962
- DOI
- 10.1021/acsaem.1c02930
- Appears in Collections:
- COLLEGE OF SCIENCE AND CONVERGENCE TECHNOLOGY[E](과학기술융합대학) > CHEMICAL AND MOLECULAR ENGINEERING(화학분자공학과) > Articles
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