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Widitha Samarakoon
Researcher at Oregon State University
Publications - 14
Citations - 926
Widitha Samarakoon is an academic researcher from Oregon State University. The author has contributed to research in topics: Epitaxy & Perovskite (structure). The author has an hindex of 7, co-authored 10 publications receiving 415 citations.
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Journal ArticleDOI
Thermally Driven Structure and Performance Evolution of Atomically Dispersed FeN4 Sites for Oxygen Reduction
Jiazhan Li,Jiazhan Li,Hanguang Zhang,Widitha Samarakoon,Weitao Shan,David A. Cullen,Stavros Karakalos,Mengjie Chen,Daming Gu,Karren L. More,Guofeng Wang,Zhenxing Feng,Zhen-Bo Wang,Gang Wu +13 more
TL;DR: This approach is able to deconvolute Fe-N bond formation from complex carbonization and nitrogen doping, which correlates Fe-n bond properties with activity and stability of FeN 4 sites as a function of thermal activation temperatures.
Journal ArticleDOI
3D porous graphitic nanocarbon for enhancing the performance and durability of Pt catalysts: a balance between graphitization and hierarchical porosity
Zhi Qiao,Sooyeon Hwang,Xing Li,Xing Li,Chenyu Wang,Widitha Samarakoon,Stavros Karakalos,Dongguo Li,Mengjie Chen,Yanghua He,Maoyu Wang,Zhenyu Liu,Guofeng Wang,Hua Zhou,Zhenxing Feng,Dong Su,Jacob S. Spendelow,Gang Wu +17 more
TL;DR: In this paper, a porous graphitic carbon (PGC) was used in a proton exchange membrane fuel cells (PEMFCs) to provide high porosity at multiple scales, which is favorable for uniform Pt nanoparticle dispersion and enhanced corrosion resistance.
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Atomically Dispersed Single Ni Site Catalysts for Nitrogen Reduction toward Electrochemical Ammonia Synthesis Using N2 and H2O
Shreya Mukherjee,Xiaoxuan Yang,Weitao Shan,Widitha Samarakoon,Stavros Karakalos,David A. Cullen,Karren L. More,Maoyu Wang,Zhenxing Feng,Guofeng Wang,Gang Wu +10 more
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Engineering Atomically Dispersed FeN4 Active Sites for CO2 Electroreduction
Nadia Mohd Adli,Weitao Shan,Sooyeon Hwang,Widitha Samarakoon,Stavros Karakalos,Yi Li,David A. Cullen,Dong Su,Zhenxing Feng,Guofeng Wang,Gang Wu +10 more
TL;DR: Using a Fe-N-C model catalyst derived from the ZIF-8, three key morphological and structural elements of FeN 4 sites are deconvoluted, including particle sizes of catalysts, Fe content, andFe-N bond structures, which elucidated the origin of intrinsic activity improvement associated with the optimal local strain on the Fe- N bond.
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Stabilizing atomic Pt with trapped interstitial F in alloyed PtCo nanosheets for high-performance zinc-air batteries
Zhao Li,Wenhan Niu,Zhenzhong Yang,Nusaiba Zaman,Widitha Samarakoon,Maoyu Wang,Abdelkader Kara,Marcos Lucero,Manasi V. Vyas,Hui Cao,Hua Zhou,George E. Sterbinsky,Zhenxing Feng,Yingge Du,Yang Yang +14 more
TL;DR: In this paper, a novel strategy to stabilize atomic Pt catalysts in alloyed platinum cobalt nanosheets with trapped interstitial fluorine (SA-PtCoF) for ZABs was proposed.