Three-dimensional(3D)porous boron-doped diamond(BDD)film is an attractive electrode material but tough to synthesize.Herein,the 3D porous BDD films were constructed in a facile and template-free way.The BDD/non-diamond carbon(NDC)composite films were firstly fabricated by hot filament chemical vapor deposition(HFCVD)technique,and then the porous BDD films with 3D interconnected porous mi-crostructure,different pore size and NDC-free diamond were achieved by selective removal of NDC.It is manifested that higher electrochemical response,large double layer capacitance(17.54 mF/cm2)in dia-mond electrodes,wide electrochemical window of 2.6 V and superior long-term stability were achieved for 3D porous BDD film.This derives from the synergistic effect of microstructure and phase composition of the porous films.3D interconnected structure possesses prominent improvement of effective surface area and accessible porous channel,significantly enhancing the species adsorption and mass transfer.The 3D porous BDD films,composed of NDC-free diamond,exhibit excellent structural stability and corrosion resistance,which favor the enhancement of long-term stability and water splitting overpotential.The facile fabricating approach and excellent structure/electrochemical character demonstrate the appealing application in many electrochemical fields for 3D porous BDD films,such as energy storage and conver-sion,wastewater treatment and purification.

Zhigang Lu;Nan Huang;Zhaofeng Zhai;Bin Chen;Lusheng Liu;Haozhe Song;Ziyao Yuan;Chuyan Zhang;Bing Yang;Xin Jiang

Shenyang National Laboratory for Materials Science,Institute of Metal Research,Chinese Academy of Sciences,Shenyang 110016,China;School of Materials Science and Engineering,University of Science and Technology of China,Shenyang 110016,China;Institute of Materials Engineering,University of Siegen,No.9-11 Paul-Bonatz-Str.,Siegen 57076,Germany

材料科学技术（英文版）

[1]Zhigang Lu;Nan Huang;Zhaofeng Zhai;Bin Chen;Lusheng Liu;Haozhe Song;Ziyao Yuan;Chuyan Zhang;Bing Yang;Xin Jiang-.Integration of 3D interconnected porous microstructure and high electrochemical property for boron-doped diamond by facile strategy)[J].材料科学技术（英文版）,2022(10):26-35

crostructure

Integration,interconnected,porous,microstructure,electrochemical,property,boron,doped,diamond,by,facile,strategy,Three,dimensional,BDD,attractive,material,but,tough,synthesize,Herein,films,were,constructed,template,free,way,carbon,NDC,composite,firstly,fabricated,hot,filament,vapor,deposition,HFCVD,technique,then,different,pore,achieved,selective,removal,It,manifested,that,higher,response,large,double,layer,capacitance,mF,electrodes,wide,window,superior,long,term,stability,This,derives,from,synergistic,phase,composition,possesses,prominent,improvement,effective,surface,area,accessible,channel,significantly,enhancing,species,adsorption,mass,transfer,composed,exhibit,excellent,structural,corrosion,resistance,which,favor,enhancement,splitting,overpotential,fabricating,approach,character,demonstrate,appealing,application,many,fields,such,energy,storage,conver,wastewater,treatment,purification

0.527928