Interfacial Electronic Structure Modulation of NiTe Nanoarrays with NiS Nanodots Facilitates Electrocatalytic Oxygen Evolution

2019 ◽  
Vol 31 (21) ◽  
pp. 1900430 ◽  
Author(s):  
Ziqian Xue ◽  
Xia Li ◽  
Qinglin Liu ◽  
Mengke Cai ◽  
Kang Liu ◽  
...  
Keyword(s):  
Electronic Structure ◽  
Oxygen Evolution ◽  
Interfacial Electronic Structure ◽  
Structure Modulation

Interfacial Electronic Structure Modulation Enables CoMoOx/CoOx/RuOx an Advanced Oxygen Evolution Electrocatalysis

2021 ◽  
Author(s):  
Cheng Wang ◽  
Hongyuan Shang ◽  
Yuan Wang ◽  
Hui Xu ◽  
Jie Li ◽  
...  
Keyword(s):  
Electronic Structure ◽  
Electrochemical Properties ◽  
Oxygen Evolution ◽  
Oxygen Evolution Reaction ◽  
Interfacial Electronic Structure ◽  
Structure Modulation ◽  
Promising Avenue

Interface and electronic structure modulation are widely recognized as promising avenue for optimizing the physiochemical and electrochemical properties of nanomaterials, which are crucial to improving the electrocatalytic oxygen evolution reaction...

Electronic structure modulation of metal-free graphdiyne for acidic oxygen evolution reaction

2D Materials ◽  
2021 ◽  
Author(s):  
Zhiqiang Zheng ◽  
Yurui Xue ◽  
Yaqi Gao ◽  
Zhongqiang Wang ◽  
Shuya Zhao ◽  
...  
Keyword(s):  
Electronic Structure ◽  
Oxygen Evolution ◽  
Oxygen Evolution Reaction ◽  
High Performance ◽  
Carbon Materials ◽  
Metal Free ◽  
Catalytic Activities ◽  
Structure Modulation ◽  
Flexible Metal ◽  
Kinetics Of

Abstract Developing high-performance metal-free electrocatalysts for acidic oxygen evolution reaction (AOER) is highly desirable but remains great challenge. Here we report a rationally substituting sp-C strategy for the synthesis of methyl- and hydrogen-substituted graphdiyne (MGDY, HGDY) nanowires arrays as 3D porous flexible metal-free electrodes for AOER. Methyl group in MGDY with stronger electron-pushing effect makes electrons around the acetylenic carbon atoms more delocalized, resulting in more uneven distributed surface charge, and higher intrinsic catalytic activities for AOER than HGDY, with the smaller overpotential of 406 mV at 10 mA cm−2 than HGDY and previously reported metal-free electrocatalysts. Our results reveal that the modulation of the electronic structure of GDY by selectively substituting sp-C allows for facilitating charge transfer kinetics, improving adsorption of reaction intermediate, and thereby accelerating the sluggish kinetics of AOER. This work provides us an ideal opportunity for studying the exact HER/OER mechanisms of metal-free carbon materials.

Improving the oxygen evolution reaction using electronic structure modulation of sulfur-retaining nickel-based electrocatalysts

2021 ◽  
Author(s):  
Man Ho Han ◽  
Min-wook Pin ◽  
Jai Hyun Koh ◽  
Jong Hyeok Park ◽  
Jihyun Kim ◽  
...  
Keyword(s):  
Electronic Structure ◽  
Transition Metals ◽  
Oxygen Evolution ◽  
Oxygen Evolution Reaction ◽  
Experimental Studies ◽  
Promising Method ◽  
Catalytic Activities ◽  
Structure Modulation

The sulfurization of transition metals is a promising method for improving their catalytic activities in the oxygen evolution reaction (OER). However, experimental studies regarding the effects of undissolved, remaining S...

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