Results 251 to 260 of about 87,352 (306)

High-efficiency multilayer grating for enhanced tender x-ray photoelectron spectroscopy. [PDF]

Sci Rep
Tan WJ, Majhi A, Singhapong W, Walters AC, van Spronsen MA, Held G, Karagoz B, Grinter DC, Ferrer P, Venkat G, Huang Q, Zhang Z, Wang Z, Wang PY, Sokolov A, Wang H, Sawhney K.   +16 more
europepmc   +1 more source

The PGM-index [PDF]

Proceedings of the VLDB Endowment, 2020
We present the first learned index that supports predecessor, range queries and updates within provably efficient time and space bounds in the worst case.
Ferragina, Paolo, Vinciguerra, Giorgio
semanticscholar   +3 more sources

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Immobilizing Low‐Cost Metal Nitrides in Electrochemically Reconstructed Platinum Group Metal (PGM)‐Free Oxy‐(Hydroxides) Surface for Exceptional OER Kinetics in Anion Exchange Membrane Water Electrolysis

Advanced Energy Materials, 2022
A highly efficient and platinum group metal (PGM)‐free oxygen evolution reaction (OER) electrode is developed by immobilizing Ni3N particles on the electrochemically reconstructed amorphous oxy‐hydroxides surface, resulting in a twofold higher industrial
P. Thangavel, Hojeong Lee, Tae-Hoon Kong, S. Kwon, A. Tayyebi, Jihyeon Janel Lee, S. Choi, Youngkook Kwon   +7 more
semanticscholar   +1 more source

Low‐PGM and PGM‐Free Catalysts for Proton Exchange Membrane Fuel Cells: Stability Challenges and Material Solutions

Advances in Materials, 2020
Fuel cells as an attractive clean energy technology have recently regained popularity in academia, government, and industry. In a mainstream proton exchange membrane (PEM) fuel cell, platinum‐group‐metal (PGM)‐based catalysts account for ≈50% of the ...
L. Du, V. Prabhakaran, Xiaohong Xie, Sehkyu Park, Yong Wang, Yuyan Shao   +5 more
semanticscholar   +1 more source

PGM Recovery: Maximizing PGM Dissolution through Minimizing Ostwald Ripening

ECS Meeting Abstracts, 2023
Efficient recovery of platinum group metals (PGMs) through electrochemical means using mild conditions is of significant impact from both the industrial and the environmental points of view. Owing to their large surface-to-volume ratio, fast dissolution of PGM nanoparticles is possible through potential cycling between oxidizing and reducing ...
Shuang Ma Andersen, Raghunandan Sharma
openaire   +1 more source

Acid Stability and Demetalation of PGM-Free ORR Electrocatalyst Structures from Density Functional Theory: A Model for “Single-Atom Catalyst” Dissolution

, 2020
Platinum group metal-free (PGM-free) materials based on pyrolyzed M–N–C precursors offer a promising approach to replacing rare and expensive platinum group metal-based oxygen reduction reaction (O...
Edward F. Holby, Guofeng Wang, P. Zelenay   +2 more
semanticscholar   +1 more source

Strategies for Engineering High‐Performance PGM‐Free Catalysts toward Oxygen Reduction and Evolution Reactions

, 2020
The worldwide fossil fuel shortage and resultant environmental issues urgently require renewable and clean energy technologies. Electrocatalytic oxygen reduction/evolution reactions (ORR/OER) are the cornerstone for renewable energy conversion and ...
L. Du, Lixin Xing, Gaixia Zhang, M. Dubois, Shuhui Sun   +4 more
semanticscholar   +1 more source