Institution
Kent State University
Education•Kent, Ohio, United States•
About: Kent State University is a education organization based out in Kent, Ohio, United States. It is known for research contribution in the topics: Liquid crystal & Population. The organization has 10897 authors who have published 24607 publications receiving 720309 citations. The organization is also known as: Kent State & KSU.
Papers published on a yearly basis
Papers
More filters
••
TL;DR: In this article, the authors designed and synthesized nitrogen and phosphorus dual-doped graphene as a non-metallic electrocatalyst for sustainable and efficient hydrogen production, which showed higher electrocatalytic hydrogen evolution reaction (HER) activity than single-dope ones and comparable performance to some traditional metallic catalysts.
Abstract: Replacement of precious Pt catalyst with cost-effective alternatives would be significantly beneficial for hydrogen production via electrocatalytic hydrogen evolution reaction (HER). All candidates thus far are exclusively metallic catalysts, which suffer inherent corrosion and oxidation susceptibility during acidic proton-exchange membrane electrolysis. Herein, based on theoretical predictions, we designed and synthesized nitrogen (N) and phosphorus (P) dual-doped graphene as a nonmetallic electrocatalyst for sustainable and efficient hydrogen production. The N and P heteroatoms could coactivate the adjacent C atom in the graphene matrix by affecting its valence orbital energy levels to induce a synergistically enhanced reactivity toward HER. As a result, the dual-doped graphene showed higher electrocatalytic HER activity than single-doped ones and comparable performance to some of the traditional metallic catalysts.
899 citations
••
TL;DR: All the developed CO2 -reduction cocatalysts for semiconductor-based photocatalytic CO2 conversion are summarized, and their functions and mechanisms are discussed.
Abstract: Ever-increasing fossil-fuel combustion along with massive CO2 emissions has aroused a global energy crisis and climate change. Photocatalytic CO2 reduction represents a promising strategy for clean, cost-effective, and environmentally friendly conversion of CO2 into hydrocarbon fuels by utilizing solar energy. This strategy combines the reductive half-reaction of CO2 conversion with an oxidative half reaction, e.g., H2 O oxidation, to create a carbon-neutral cycle, presenting a viable solution to global energy and environmental problems. There are three pivotal processes in photocatalytic CO2 conversion: (i) solar-light absorption, (ii) charge separation/migration, and (iii) catalytic CO2 reduction and H2 O oxidation. While significant progress is made in optimizing the first two processes, much less research is conducted toward enhancing the efficiency of the third step, which requires the presence of cocatalysts. In general, cocatalysts play four important roles: (i) boosting charge separation/transfer, (ii) improving the activity and selectivity of CO2 reduction, (iii) enhancing the stability of photocatalysts, and (iv) suppressing side or back reactions. Herein, for the first time, all the developed CO2 -reduction cocatalysts for semiconductor-based photocatalytic CO2 conversion are summarized, and their functions and mechanisms are discussed. Finally, perspectives in this emerging area are provided.
894 citations
••
TL;DR: This study may stimulate the development of metal-free electrocatalysts for other key energy conversion processes including hydrogen evolution and oxygen evolution reactions and largely expand the spectrum of catalysts for energy-related electrocatalysis reactions.
Abstract: The mutually corroborated electrochemical measurements and density functional theory (DFT) calculations were used to uncover the origin of electrocatalytic activity of graphene-based electrocatalysts for oxygen reduction reaction (ORR). A series of graphenes doped with nonmetal elements was designed and synthesized, and their ORR performance was evaluated in terms of four electrochemical descriptors: exchange current density, on-set potential, reaction pathway selectivity and kinetic current density. It is shown that these descriptors are in good agreement with DFT calculations, allowing derivation of a volcano plot between the ORR activity and the adsorption free energy of intermediates on metal-free materials, similarly as in the case of metallic catalysts. The molecular orbital concept was used to justify this volcano plot, and to theoretically predict the ORR performance of an ideal graphene-based catalyst, the ORR activity of which is comparable to the state-of-the-art Pt catalyst. Moreover, this study may stimulate the development of metal-free electrocatalysts for other key energy conversion processes including hydrogen evolution and oxygen evolution reactions and largely expand the spectrum of catalysts for energy-related electrocatalysis reactions.
890 citations
••
TL;DR: This secondary analysis of television viewing motivations and patterns located two television user types: users of the television medium for time consumption and entertainment; and users of television content for nonescapist, information seeking.
Abstract: This secondary analysis of television viewing motivations and patterns located two television user types: (1) users of the television medium for time consumption and entertainment; and (2) users of television content for nonescapist, information seeking.
869 citations
•
TL;DR: The article examines issues involved in comparing groups and measuring change with pretest and posttest data and the reliability of gain scores in pretest-posttest measurement in the context of rehabilitation research and practice.
Abstract: The article examines issues involved in comparing groups and measuring change with pretest and posttest data. Different pretest-posttest designs are presented in a manner that can help rehabilitation professionals to better understand and determine effects resulting from selected interventions. The reliability of gain scores in pretest-posttest measurement is also discussed in the context of rehabilitation research and practice.
868 citations
Authors
Showing all 11015 results
Name | H-index | Papers | Citations |
---|---|---|---|
Russel J. Reiter | 169 | 1646 | 121010 |
Marco Costa | 146 | 1458 | 105096 |
Jong-Sung Yu | 124 | 1051 | 72637 |
Mietek Jaroniec | 123 | 571 | 79561 |
M. Cherney | 118 | 572 | 49933 |
Qiang Xu | 117 | 585 | 50151 |
Lee Stuart Barnby | 116 | 494 | 43490 |
Martin Knapp | 106 | 1067 | 48518 |
Christopher Shaw | 97 | 771 | 52181 |
B. V.K.S. Potukuchi | 96 | 190 | 30763 |
Vahram Haroutunian | 94 | 424 | 38954 |
W. E. Moerner | 92 | 478 | 35121 |
Luciano Rezzolla | 90 | 394 | 26159 |
Bruce A. Roe | 89 | 295 | 76365 |
Susan L. Brantley | 88 | 358 | 25582 |