Operando Monitoring and Deciphering the Structural Evolution in Oxygen Evolution Electrocatalysis

2022 ◽  
pp. 2103383
Author(s):  
Shouwei Zuo ◽  
Zhi‐Peng Wu ◽  
Huabin Zhang ◽  
Xiong Wen (David) Lou
2019 ◽  
Vol 7 (10) ◽  
pp. 5288-5294 ◽  
Author(s):  
Jihong Li ◽  
Hui Chen ◽  
Yipu Liu ◽  
Ruiqin Gao ◽  
Xiaoxin Zou

A boronized nickel plate shows surface structural evolution and activity enhancement during the OER due to synergistic geometric and electronic effects, and shows good catalytic stability for over 1500 hours.


2018 ◽  
Vol 11 (6) ◽  
pp. 5590-5594 ◽  
Author(s):  
Christian Dette ◽  
Michael R. Hurst ◽  
Jiang Deng ◽  
Michael R. Nellist ◽  
Shannon W. Boettcher

2021 ◽  
Vol 7 (2) ◽  
pp. eabc7323
Author(s):  
Gang Wan ◽  
John W. Freeland ◽  
Jan Kloppenburg ◽  
Guido Petretto ◽  
Jocienne N. Nelson ◽  
...  

The use of renewable electricity to prepare materials and fuels from abundant molecules offers a tantalizing opportunity to address concerns over energy and materials sustainability. The oxygen evolution reaction (OER) is integral to nearly all material and fuel electrosyntheses. However, very little is known about the structural evolution of the OER electrocatalyst, especially the amorphous layer that forms from the crystalline structure. Here, we investigate the interfacial transformation of the SrIrO3 OER electrocatalyst. The SrIrO3 amorphization is initiated by the lattice oxygen redox, a step that allows Sr2+ to diffuse and O2− to reorganize the SrIrO3 structure. This activation turns SrIrO3 into a highly disordered Ir octahedral network with Ir square-planar motif. The final SryIrOx exhibits a greater degree of disorder than IrOx made from other processing methods. Our results demonstrate that the structural reorganization facilitated by coupled ionic diffusions is essential to the disordered structure of the SrIrO3 electrocatalyst.


2020 ◽  
Vol 56 (56) ◽  
pp. 7722-7725 ◽  
Author(s):  
Qian Ren ◽  
Jin-Qi Wu ◽  
Jia-Wei Zhao ◽  
Cheng-Fei Li ◽  
Li Gong ◽  
...  

A porous fence-like MOF transforms into a dense pillared-layer coordination polymer, improving its chemical stability and exhibiting an excellent electrolytic OER performance.


2019 ◽  
Vol 442 ◽  
pp. 227252 ◽  
Author(s):  
Yao Zhang ◽  
Haoran Guo ◽  
Pengfei Yuan ◽  
Kanglei Pang ◽  
Baoxue Cao ◽  
...  

2020 ◽  
Vol 3 (12) ◽  
pp. 12407-12416
Author(s):  
Martin A. W. Schoen ◽  
Nicholas M. Randell ◽  
Oliver Calderon ◽  
Santiago Jimenez Villegas ◽  
Zachary Thomson ◽  
...  

Author(s):  
L.D. Schmidt ◽  
K. R. Krause ◽  
J. M. Schwartz ◽  
X. Chu

The evolution of microstructures of 10- to 100-Å diameter particles of Rh and Pt on SiO2 and Al2O3 following treatment in reducing, oxidizing, and reacting conditions have been characterized by TEM. We are able to transfer particles repeatedly between microscope and a reactor furnace so that the structural evolution of single particles can be examined following treatments in gases at atmospheric pressure. We are especially interested in the role of Ce additives on noble metals such as Pt and Rh. These systems are crucial in the automotive catalytic converter, and rare earths can significantly modify catalytic properties in many reactions. In particular, we are concerned with the oxidation state of Ce and its role in formation of mixed oxides with metals or with the support. For this we employ EELS in TEM, a technique uniquely suited to detect chemical shifts with ∼30Å resolution.


Nanoscale ◽  
2020 ◽  
Vol 12 (39) ◽  
pp. 20413-20424
Author(s):  
Riming Hu ◽  
Yongcheng Li ◽  
Fuhe Wang ◽  
Jiaxiang Shang

Bilayer single atom catalysts can serve as promising multifunctional electrocatalysts for the HER, ORR, and OER.


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