Design of macrocycles mono- and multinuclear nickel complexes based 1,4,7,10-tetraazacyclododecane and electrocatalytic activities for hydrogen evolution

作者：Zhang, Yan; Qi, Xiao-Fang; Guan, Sheng-Qiao; Zhan, Shu-Zhong^*

来源：Inorganic Chemistry Communication, 2023, 156: 111150.

DOI：10.1016/j.inoche.2023.111150

• Multinuclear nickel complexes
• Electrocatalysis
• Hydrogen evolution

Mono-, bi- and tetranuclear nickel complexes, [Ni(cyclen)Cl]Cl, <bold>(NiL1)</bold>, [Ni(cyclen)Cl2Ni(cyclen)]Cl-2, (<bold>Ni(2)L2)</bold> and [Ni(cyclen)(SCN)(3)Ni-2(SCN)(3)Ni(cyclen)], (<bold>Ni(4)L3)</bold> have been designed, synthesized and characterized, respectively. All of them can serve as catalysts for electrochemically driven hydrogen evolution. Under an overpotential (OP) of 837.6 mV, <bold>NiL1, Ni(2)L2</bold> and <bold>Ni(4)L3</bold> can electrocatalyze hydrogen evolution from a neutral water with a turnover frequency (TOF) of 956.44, 1989.45 and 2675.25 mol of hydrogen per mole of catalyst per hour (mol H-2/mol catalyst/h), respectively. The results show that tetranuclear nickel complex <bold>Ni(4)L3</bold> shows a more efficient activity for H-2 generation than mono- and binuclear nickel complexes <bold>Ni(2)L2</bold> and <bold>NiL1</bold>. Several electrochemical measurements and analysis are carried out to study catalytic mechanism for H-2 production.

• 单位
  东莞理工学院