Nickel-based electrodes as catalysts for hydrogen evolution reaction in alkaline media
- 356 Downloads
This paper reports a systematical study on the microstructures and electrochemical properties of nickel-based electrodes as low-cost catalysts for hydrogen evolution reaction (HER) in alkaline media. The electrodeposited Ni-Sn alloy displays a hydrogen overpotential of 137 mV at cathodic polarization current of 200 mA cm−2, which is lower than that of Raney-Ni and nickel net electrodes. The Tafel results show that the Volmer reaction is the rate determining step of HER for nickel net and Raney-Ni, while the hydrogen evolution reaction is controlled by a peculiar model for deposited Ni-Sn alloy. The energy consumption of alkaline water electrolysis could be reduced from 4.63 to 4.26 kW h/m3H2 by using Ni-Sn alloy electrodes to replace Raney-Ni in electrolyzers, producing good economic and environmental benefits.
KeywordsHydrogen evolution reaction Ni-Sn alloy Raney-Ni Hydrogen overpotential Energy consumption
This work was supported by the National High Technology Development Plan (863) of China under grant no. 2014AA052501.
- 9.Pu ZH, Amiinu IS, Zhang CT, Wang M, Kou ZK, Mu SC (2017) Phytic acid-derivative transition metal phosphides encapsulated in N,P-codoped carbon: an efficient and durabale hydrogen evolution electrocatalyst in a wide pH range. Nano 9:3555–3560Google Scholar
- 26.Milan MJ (1990) Electrocatalysis of hydrogen evolution in the light of the brewer-engel valence-bond theory and d-d electronic correlation. Hydrogen Energy Prog VIII:437–459Google Scholar
- 32.Bagotsky VS (2005) Fundamentals of electrochemistry, 2nd edn. John Wiley & Sons, Inc., New Jersey, pp 139–143Google Scholar