Electrocatalytic water splitting is a viable technique for generating hydrogen but is precluded from the sluggish kinetics of oxygen evolution reac-tions(OER).Small molecule oxidation reactions with lower working potentials,such as methanol oxidation reactions,are good alternatives to OER with faster kinetics.However,the typically employed Ni-based electrocatalysts have poor activity and stability.Herein,a novel three-dimensional(3D)-networking Mo-doped Ni(OH)2 with ultralow Ni-Ni coordination is synthesized,which exhibits a high MOR activity of 100 mA cm-2 at 1.39 V,delivering 28 mV dec-1 for the Tafel slope.Meanwhile,hydrogen evolution with value-added formate co-generation is boosted with a current density of more than 500 mA cm-2 at a cell voltage of 2.00 V for 50 h,showing excellent stability in an industrial alkaline concentration(6 M KOH).Mechanistic studies based on density functional the-ory and X-ray absorption spectroscopy showed that the improved performance is mainly attributed to the ultralow Ni-Ni coordination,3D-networking struc-tures and Mo dopants,which improve the catalytic activity,increase the active site density and strengthen the Ni(OH)2 3D-networking structures,respectively.This study paves a new way for designing electrocatalysts with enhanced activity and durability for industrial energy-saving hydrogen production.

Guodong Fu;Xiaomin Kang;Yan Zhang;Xiaoqiang Yang;Lei Wang;Xian-Zhu Fu;Jiujun Zhang;Jing-Li Luo;Jianwen Liu

Shenzhen Key Laboratory of Polymer Science and Technology,Guangdong Research Center for Interfacial Engineering of Functional Materials,College of Materials Science and Engineering,Shenzhen University,Shenzhen 518060,People's Republic of China;School of Mechanical Engineering,University of South China,Hengyang 421001,Hunan Province,People's Republic of China;Institute for Sustainable Energy,College of Sciences,Shanghai University,Shanghai 200444,People's Republic of China

纳微快报（英文）

[1]Guodong Fu;Xiaomin Kang;Yan Zhang;Xiaoqiang Yang;Lei Wang;Xian-Zhu Fu;Jiujun Zhang;Jing-Li Luo;Jianwen Liu-.Coordination Effect-Promoted Durable Ni(OH)2 for Energy-Saving Hydrogen Evolution from Water/Methanol Co-Electrocatalysis)[J].纳微快报（英文）,2022(12):176-194

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Coordination,Effect,Promoted,Durable,Energy,Saving,Hydrogen,Evolution,from,Water,Methanol,Electrocatalysis,Electrocatalytic,water,splitting,viable,technique,generating,hydrogen,sluggish,kinetics,oxygen,evolution,OER,Small,molecule,oxidation,reactions,lower,potentials,such,methanol,are,good,alternatives,faster,However,typically,employed,electrocatalysts,have,poor,activity,stability,Herein,novel,three,dimensional,networking,Mo,doped,ultralow,coordination,synthesized,which,exhibits,high,MOR,mA,delivering,mV,dec,Tafel,slope,Meanwhile,value,added,formate,generation,boosted,current,density,more,voltage,showing,excellent,industrial,alkaline,concentration,KOH,Mechanistic,studies,functional,ory,ray,absorption,spectroscopy,showed,that,improved,performance,mainly,attributed,dopants,increase,active,site,strengthen,structures,respectively,This,study,paves,new,way,designing,enhanced,durability,energy,saving,production

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