One-step electrodeposited nickel phosphide electrode for pH-universal electrochemical hydrogen production

Author(s)

Silva, A. B. ; Medina, M. ; Goulart, L. A. ; Mascaro, L. H.

• Document type: Journal article
• Source: Electrochimica Acta; v. 475, p. 9-pg., 2023-12-20.

Abstract

Herein, we describe the development and study of the relationship between the Ni molar ratio of amorphous nickel phosphide (Ni-P) electrodes synthesized via electrodeposition on Ni foam (NF) applied as a non-precious electrocatalyst for the Hydrogen Evolution Reaction (HER) in a pH-universal. The 3-Ni-P electrode displayed outstanding HER performance in alkaline, neutral, and acidic conditions with an overpotential of 69, 165, and 56 mV at -10 mA cm-2. Furthermore, the Ni-P films showed excellent stability under the different conditions studied. The optimized 3-Ni-P electrode performance was attributed to its granular structure with a large surface area, enabling good interaction with the electrolyte, which endorses the HER kinetics. These results are relevant concerning an adequate choice of stable catalyst material, easy to synthesize and capable of operating in a wide range of pH with high efficiency for HER. (AU)

• FAPESP's process: 17/12794-2 - Synthesis, characterization and application of MoS2 and WS2 films in photoelectrocatalysis for hydrogen production
• Grantee: Marina Medina da Silva
• Support Opportunities: Scholarships in Brazil - Doctorate (Direct)
• FAPESP's process: 13/07296-2 - CDMF - Center for the Development of Functional Materials
• Grantee: Elson Longo da Silva
• Support Opportunities: Research Grants - Research, Innovation and Dissemination Centers - RIDC
• FAPESP's process: 17/11986-5 - Generation and storage of New Energy: bringing technological development for the country
• Grantee: Ana Flávia Nogueira
• Support Opportunities: Research Grants - Research Centers in Engineering Program
• FAPESP's process: 20/11756-2 - Synthesis, characterization, and application of metal phosphide films for CO2 reduction
• Grantee: Anelisse Brunca da Silva
• Support Opportunities: Scholarships in Brazil - Doctorate