atomic interface
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2021 ◽  
Vol 39 (6) ◽  
pp. 063209
Author(s):  
Khan Alam ◽  
Rodrigo Ponce-Pérez ◽  
Kai Sun ◽  
Andrew Foley ◽  
Noboru Takeuchi ◽  
...  

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Ashwani Kumar ◽  
Viet Q. Bui ◽  
Jinsun Lee ◽  
Lingling Wang ◽  
Amol R. Jadhav ◽  
...  

AbstractSingle-atom-catalysts (SACs) afford a fascinating activity with respect to other nanomaterials for hydrogen evolution reaction (HER), yet the simplicity of single-atom center limits its further modification and utilization. Obtaining bimetallic single-atom-dimer (SAD) structures can reform the electronic structure of SACs with added atomic-level synergistic effect, further improving HER kinetics beyond SACs. However, the synthesis and identification of such SAD structure remains conceptually challenging. Herein, systematic first-principle screening reveals that the synergistic interaction at the NiCo-SAD atomic interface can upshift the d-band center, thereby, facilitate rapid water-dissociation and optimal proton adsorption, accelerating alkaline/acidic HER kinetics. Inspired by theoretical predictions, we develop a facile strategy to obtain NiCo-SAD on N-doped carbon (NiCo-SAD-NC) via in-situ trapping of metal ions followed by pyrolysis with precisely controlled N-moieties. X-ray absorption spectroscopy indicates the emergence of Ni-Co coordination at the atomic-level. The obtained NiCo-SAD-NC exhibits exceptional pH-universal HER-activity, demanding only 54.7 and 61 mV overpotentials at −10 mA cm−2 in acidic and alkaline media, respectively. This work provides a facile synthetic strategy for SAD catalysts and sheds light on the fundamentals of structure-activity relationships for future applications.


2021 ◽  
pp. 2110223
Author(s):  
Da Xu ◽  
Ling Chen ◽  
Xiaozhi Su ◽  
Hongliang Jiang ◽  
Cheng Lian ◽  
...  

Nano Research ◽  
2021 ◽  
Author(s):  
Zhijun Li ◽  
Mingyang Zhang ◽  
Lili Zhang ◽  
Xiuli Dong ◽  
Leipeng Leng ◽  
...  
Keyword(s):  

Author(s):  
Danni Zhou ◽  
Zhaoming Xia ◽  
Huishan Shang ◽  
Hai Xiao ◽  
Zhuoli Jiang ◽  
...  

Interface engineering has been demonstrated to have great effect on designing high performance catalysts. Especially, the interface design at the atomic scale is always a big challenge. Herein, we propose...


Nano Research ◽  
2020 ◽  
Vol 13 (11) ◽  
pp. 3068-3074 ◽  
Author(s):  
Kaian Sun ◽  
Lei Zhao ◽  
Lingyou Zeng ◽  
Shoujie Liu ◽  
Houyu Zhu ◽  
...  

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