title: Energy-Saving Electrolytic Hydrogen Generation: Ni2P Nanoarray as a High-Performance Non-Noble-Metal Electrocatalyst.
abstract: It is highly attractive but challenging to develop earth-abundant electrocatalysts for energy-saving electrolytic hydrogen generation. Herein, we report that Ni2P nanoarrays grown in situ on nickel foam (Ni2P/NF) behave as a durable high-performance non-noble-metal electrocatalyst for hydrazine oxidation reaction (HzOR) in alkaline media. The replacement of the sluggish anodic oxygen evolution reaction with such the more thermodynamically favorable HzOR enables energy-saving electrochemical hydrogen production with the use of Ni2P/NF as a bifunctional catalyst for anodic HzOR and cathodic hydrogen evolution reaction. When operated at room temperature, this two-electrode electrolytic system drives 500 mA cm-2at a cell voltage as low as 1.0 V with strong long-term electrochemical durability and 100 % Faradaic efficiency for hydrogen evolution in 1.0 m KOH aqueous solution with 0.5 m hydrazine.
authors.affiliation: College of Chemistry, Sichuan University, Chengdu, 610064, Sichuan, China.
authors.forename: Chun
authors.initials: C
authors.lastname: Tang
authors.affiliation: College of Chemistry, Sichuan University, Chengdu, 610064, Sichuan, China.
authors.forename: Rong
authors.initials: R
authors.lastname: Zhang
authors.affiliation: College of Chemistry, Sichuan University, Chengdu, 610064, Sichuan, China.
authors.forename: Wenbo
authors.initials: W
authors.lastname: Lu
authors.affiliation: College of Chemistry, Sichuan University, Chengdu, 610064, Sichuan, China.
authors.forename: Zao
authors.initials: Z
authors.lastname: Wang
authors.affiliation: College of Chemistry, Sichuan University, Chengdu, 610064, Sichuan, China.
authors.forename: Danni
authors.initials: D
authors.lastname: Liu
authors.affiliation: College of Chemistry, Sichuan University, Chengdu, 610064, Sichuan, China.
authors.forename: Shuai
authors.initials: S
authors.lastname: Hao
authors.affiliation: Chengdu Institute of Geology and Mineral Resources, Chengdu, 610081, Sichuan, China.
authors.forename: Gu
authors.initials: G
authors.lastname: Du
authors.affiliation: Chemistry Department, King Abdulaziz University, Jeddah, 21589, Saudi Arabia.
authors.forename: Abdullah M
authors.initials: AM
authors.lastname: Asiri
authors.affiliation: College of Chemistry, Sichuan University, Chengdu, 610064, Sichuan, China.
authors.forename: Xuping
authors.initials: X
authors.lastname: Sun
keywords: Ni2P nanoarrays; electrolysis; energy-saving; hydrazine oxidation; hydrogen evolution