Generating highly active oxide-phosphide heterostructure through interfacial engineering to break the energy scaling relation toward urea-assisted natural seawater electrolysis  

作　　者：Ngoc Quang Tran Nam Hoang Vu Jianmin Yu Khanh Vy Pham Nguyen Thuy Tien Nguyen Tran Thuy-Kieu Truong Lishan Peng Thi Anh Le Yoshiyuki Kawazoe 

机构地区：[1]Center for Innovative Materials and Architectures,Ho Chi Minh City 700000,Vietnam [2]Vietnam National University,Ho Chi Minh City 700000,Vietnam [3]Faculty of Materials Science and Technology,University of Science,Ho Chi Minh City 700000,Vietnam [4]Department of Mechanical Engineering,Hanbat National University(HBNU),Daejeon 34158,Republic of Korea [5]Key Laboratory of Rare Earths,Ganjiang Innovation Academy,Chinese Academy of Sciences,Ganzhou 341119,Jiangxi,China [6]School of Chemical Engineering-Hanoi University of Science and Technology,Hanoi 10000,Vietnam [7]New Industry Creation Hatchery Center,Tohoku University,Sendai 980-8579,Japan

出　　处：《Journal of Energy Chemistry》2024年第10期687-699,I0014,共14页能源化学（英文版）

基　　金：supported by the Vietnam National University,Ho Chi Minh City (Grant No.TX2024-50-01);partial supported by National Natural Science Foundation of China (Grant No.22209186)。

摘　　要：Urea-assisted natural seawater electrolysis is an emerging technology that is effective for grid-scale carbon-neutral hydrogen mass production yet challenging.Circumventing scaling relations is an effective strategy to break through the bottleneck of natural seawater splitting.Herein,by DFT calculation,we demonstrated that the interface boundaries between Ni_(2)P and MoO_(2) play an essential role in the selfrelaxation of the Ni-O interfacial bond,effectively modulating a coordination number of intermediates to control independently their adsorption-free energy,thus circumventing the adsorption-energy scaling relation.Following this conceptual model,a well-defined 3D F-doped Ni_(2)P-MoO_(2) heterostructure microrod array was rationally designed via an interfacial engineering strategy toward urea-assisted natural seawater electrolysis.As a result,the F-Ni_(2)P-MoO_(2) exhibits eminently active and durable bifunctional catalysts for both HER and OER in acid,alkaline,and alkaline sea water-based electrolytes.By in-situ analysis,we found that a thin amorphous layer of NiOOH,which is evolved from the Ni_(2)P during anodic reaction,is real catalytic active sites for the OER and UOR processes.Remarkable,such electrode-assembled urea-assisted natural seawater electrolyzer requires low voltages of 1.29 and 1.75 V to drive 10 and600 mA cm^(-2)and demonstrates superior durability by operating continuously for 100 h at 100 mA cm^(-2),beyond commercial Pt/C||RuO_(2) and most previous reports.

关 键 词：Interfacial engineering Break scaling relationships Doping Natural seawater splitting Urea electrolysis 

分 类 号：TQ116.2[化学工程—无机化工]