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 - Funding Information:
Authors acknowledge the financial support from the National 1000-Plan program, the National Natural Science Foundation of China (grant nos. 21401148 and 51672229), the Science Technology and Innovation Committee of Shenzhen Municipality (grant no. JCYJ20160229165240684), and the Environment and Conservation Fund of Hong Kong SAR, China (ECF 2016-85). Y.Q. is also supported by the Cyrus Tang Foundation through Tang Scholar Program.
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
VL - 10
SP - 1728
EP - 1733
JO - ACS applied materials & interfaces
JF - ACS applied materials & interfaces
SN - 1944-8244
IS - 2
ER -