TY - JOUR
T1 - Amine-Modulated/Engineered Interfaces of NiMo Electrocatalysts for Improved Hydrogen Evolution Reaction in Alkaline Solutions
AU - Gao, Wei
AU - Gou, Wangyan
AU - Zhou, Xuemei
AU - Ho, Johnny C.
AU - Ma, Yuanyuan
AU - Qu, Yongquan
N1 - Publisher Copyright:
© 2017 American Chemical Society.
PY - 2018/1/17
Y1 - 2018/1/17
N2 - The interface between electrolytes and electrocatalysts would largely determine their corresponding activity and stability. Herein, modulating the surface characteristics of NiMo nanoparticles by various adsorbed amines gives the tunability on their interfacial properties and subsequently improves their catalytic performance for hydrogen evolution reaction (HER) in alkaline solutions. Diamines can significantly improve their HER activity by decreasing the charge-transfer resistance and modulating the electronic structures of interfacial active sites. Importantly, among various amines, ethylenediamine facilitates the HER activity of NiMo with a remarkable decrease of 268 mV in the overpotential to reach 10 mA cm-2 as compared with that of the unmodified NiMo in 1.0 M KOH. This method provides a novel strategy of regulating the interfacial properties to strengthen the catalytic performance of electrocatalysts.
AB - The interface between electrolytes and electrocatalysts would largely determine their corresponding activity and stability. Herein, modulating the surface characteristics of NiMo nanoparticles by various adsorbed amines gives the tunability on their interfacial properties and subsequently improves their catalytic performance for hydrogen evolution reaction (HER) in alkaline solutions. Diamines can significantly improve their HER activity by decreasing the charge-transfer resistance and modulating the electronic structures of interfacial active sites. Importantly, among various amines, ethylenediamine facilitates the HER activity of NiMo with a remarkable decrease of 268 mV in the overpotential to reach 10 mA cm-2 as compared with that of the unmodified NiMo in 1.0 M KOH. This method provides a novel strategy of regulating the interfacial properties to strengthen the catalytic performance of electrocatalysts.
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U2 - 10.1021/acsami.7b16125
DO - 10.1021/acsami.7b16125
M3 - Article
C2 - 29282973
AN - SCOPUS:85040742786
SN - 1944-8244
VL - 10
SP - 1728
EP - 1733
JO - ACS Applied Materials and Interfaces
JF - ACS Applied Materials and Interfaces
IS - 2
ER -