Journal
JOURNAL OF ALLOYS AND COMPOUNDS
Volume 899, Issue -, Pages -Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2021.163346
Keywords
Ni-Mo-S microstructure; Electrodeposition; HER; UOR
Categories
Funding
- National Natural Science Foundation of China [21571005]
- Natural Science Foundation of Education Department, Anhui Province [KJ2020A0090]
- Recruitment Program for Leading Talent Team of Anhui Province
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The study presents a simple and feasible approach of electrochemical deposition to construct robust and highly-active electrocatalysts for hydrogen production. The as-deposited honeycomb-like nickel-molybdenum-sulfur amorphous microstructures demonstrated excellent electrocatalytic activity for hydrogen evolution reaction and urea oxidation reaction.
It is still a challenge to prepare highly-efficient electrocatalysts through a facile and controllable technology for hydrogen production. Herein, a simple electrochemical deposition method was designed for the pre-paration of honeycomb-like nickel-molybdenum-sulfur amorphous microstructures on the nickel foam (labeled as NiMoS/NF), which exhibited excellent electrocatalytic activity for hydrogen evolution reaction (HER) and urea oxidation reaction (UOR). The as-deposited NiMoS/NF electrode merely required overpotential of 37 mV to reach the current density of 10 mA cm(-2) for HER in 1.0 M KOH solution, and presented ultralong durability above 310 h at 10 mA cm(-2). In a mixed solution of 1.0 M KOH and 0.5 M urea, simultaneously, 1.015 V of overpotential was needed to generate the current density of 100 mA cm(-2) for UOR. In a two-electrode cell with the electrolyte of 1.0 M KOH and 0.5 M urea, a voltage of 1.377 V was demanded to deliver the current density of 10 mA cm(-2). The present work shows that the electrodeposition technology is a simple and feasible approach to construct robust and highly-active electrocatalysts for H-2 production. (C) 2021 Elsevier B.V. All rights reserved.
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