TY - JOUR
T1 - Electrodeposition of dense spherical Ni3P on nickel foam cathode enhance nitrate electrochemical reduction via promoting nitrate adsorption
AU - Fu, Wenzhao
AU - Meng, Guangyuan
AU - Yin, Di
AU - Zhang, Xinwan
AU - Shi, Yaqi
AU - Yang, Zhengwu
AU - Chang, Dingming
AU - Chen, Peng
AU - Zhang, Lehua
PY - 2024/12
Y1 - 2024/12
N2 - Electrochemical nitrate reduction to nitrogen gas is considered as an alternative strategy to address water pollution problem, but the high cost and poor product selectivity of electrode limit its application. Here, Ni3P loaded nickel foam was fabricated via one-step eletrodeposition as cathode for electrochemical nitrate reduction. Due to the improvement of electron transfer rate and electrochemically active surface area, current efficiency and reaction rate constant enhanced 20.4-flod and 40-fold, respectively. Batch experiments revealed the remarkable nitrate reduction performance (∼97.53 %) after the optimization of potential, initial NO3- concentration and pH. Presence of chlorine induced electrochlorination will tune N2 (selectivity up to ∼100 %) to become the dominant products. Mechanism study suggested that the atomic H*-mediated indirect reduction, meanwhile properties of Ni3P to strengthen NO3- adsorption and prevent desorption of NO and NO2 are responsible for the enhancement of nitrate reduction. This work is meaningful for water environment protection and energy sustainable development. © 2024
AB - Electrochemical nitrate reduction to nitrogen gas is considered as an alternative strategy to address water pollution problem, but the high cost and poor product selectivity of electrode limit its application. Here, Ni3P loaded nickel foam was fabricated via one-step eletrodeposition as cathode for electrochemical nitrate reduction. Due to the improvement of electron transfer rate and electrochemically active surface area, current efficiency and reaction rate constant enhanced 20.4-flod and 40-fold, respectively. Batch experiments revealed the remarkable nitrate reduction performance (∼97.53 %) after the optimization of potential, initial NO3- concentration and pH. Presence of chlorine induced electrochlorination will tune N2 (selectivity up to ∼100 %) to become the dominant products. Mechanism study suggested that the atomic H*-mediated indirect reduction, meanwhile properties of Ni3P to strengthen NO3- adsorption and prevent desorption of NO and NO2 are responsible for the enhancement of nitrate reduction. This work is meaningful for water environment protection and energy sustainable development. © 2024
KW - Electrocatalysis
KW - Nickel foam
KW - Nickel phosphide
KW - Nitrate electroreduction
KW - Transition metal phosphide
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UR - https://www.scopus.com/record/pubmetrics.uri?eid=2-s2.0-85209103177&origin=recordpage
U2 - 10.1016/j.jece.2024.114815
DO - 10.1016/j.jece.2024.114815
M3 - RGC 21 - Publication in refereed journal
SN - 2213-2929
VL - 12
JO - Journal of Environmental Chemical Engineering
JF - Journal of Environmental Chemical Engineering
IS - 6
M1 - 114815
ER -