Results 71 to 80 of about 3,763 (235)

Regio‐Selective Electrocatalysis in Single‐Wall Carbon Nanotubes: Platinum Inside for Hydrogen Evolution Reaction/Hydrogen Oxidation Reaction and Ruthenium Outside for Oxygen Evolution Reaction

Carbon Energy, EarlyView.
A Pt‐in/Ru‐out single‐wall carbon nanotube architecture spatially separates HER/HOR and OER active sites, enabling high HER/HOR currents at low overpotential, durable OER activity, and strong resistance to Fe3+ poisoning, offering a promising bifunctional platform for unitized regenerative fuel cells.
Manoj Shanmugasundaram, Samuel Itziksohn, David Zitoun   +2 more
wiley   +1 more source

Microscopic Thermal Behavior of Iron-Mediated Platinum Group Metal Capture from Spent Automotive Catalysts

Journal of Manufacturing and Materials Processing
This research investigates the micro-mechanisms and process control associated with the recovery of platinum group metals (PGMs) from spent automotive catalysts (SACs) through iron capturing. High-temperature smelting experiments, complemented by SEM-EDS
Xiaoping Zhu, Ke Shi, Chuan Liu, Yige Yang, Jinrong Zhao, Xiaolong Sai, Shaobo Wen, Shuchen Sun   +7 more
doaj   +1 more source

Well‐Defined Nickel Precatalysts: Form, Function, and Application

Chemistry – A European Journal, EarlyView.
This review provides guidance on which nickel precatalysts to choose for a given application or which properties to prioritize in reaction development. A summary of the ease of synthesis, stability, diversity, accessibility, modularity, and general applicability is provided along with a related infographic.
Morgan E. John, George A. Koutsantonis, Reto Dorta, Scott G. Stewart   +3 more
wiley   +1 more source

Synthesis and Verification of Constraints in the PGM Protocol [PDF]

, 2003
Specifications of protocols usually involve several parameters, for example the number of retransmissions or the timeout delays. The properties satisfied by the protocol depend often on the relation between these parameters. Automatic synthesis of such relations becomes a difficult problem when the constraints are too complex, e.g., non-linear ...
Boyer, Marc, Sighireanu, Mihaela
openaire   +3 more sources

A novel, energy efficient, two stage heap leach process for the extraction and recovery of PGMs

, 2014
The platinum group metals (PGMs) and associated minerals are particularly refractory to most traditional direct leach processes. However, the remoteness of many new ore deposits, socio-political risks, the scarcity of skilled labor and constraints on the
G. Akdogan (23305411), S. Bradshaw (23337892), C. Snyders (23344180), Jacobus Eksteen (23291077), J. Mwase (23361145), N. Mpinga (23361148), J. Petersen (1276188)   +6 more
core   +1 more source

Advances in Design Strategy and Mechanism Insights for Alkaline Hydrogen Evolution Reaction: Multilevel Site Engineering and Structure–Activity Relationship

ENERGY &ENVIRONMENTAL MATERIALS, EarlyView.
This review is about material design based on engineering multilevel sites from theoretical calculation and synthetic routes to mechanism, structure–activity relationship, challenges and perspectives for boosting hydrogen production in alkaline electrolyte. Electrolytic water splitting is a clean, carbon‐free method for producing green hydrogen and has
Ke Zhang, Hongying Luo, Yudong Du, Kehao Yu, Huayu Wu, Shimin Chai, Yanyan Liu, Yongfeng Wang, Jianchun Jiang, Baojun Li   +9 more
wiley   +1 more source

Machine Learning Unveils Isolated‐Surrounded Pt Motifs in High‐Entropy Alloys for Superior Low‐Temperature Ammonia Oxidation

ENERGY &ENVIRONMENTAL MATERIALS, EarlyView.
A physics‐informed machine learning approach successfully decodes the complex catalytic activity of high‐entropy alloys for ammonia oxidation. By revealing a synergistic mechanism involving lattice and electronic couplings, the study identifies a superior “isolated‐surrounded” platinum motif.
Shangfeng Jiang, Ting Tao, Kexiang Guo, Xinyu Fan, Xu Zhang, Zhen Zhou   +5 more
wiley   +1 more source

Rational Design Strategies Toward Efficient and Stable Electrocatalysts for Hydrogen Production via Water Electrolysis: A Comprehensive Review

Small, EarlyView.
ABSTRACT Active and stable electrocatalysts are critical for sustainable hydrogen production, particularly for high‐current‐density water electrolysis and specialized applications like seawater splitting. However, most water‐splitting electrocatalysts show limited activity at high current densities and poor long‐term stability, making it difficult to ...
Nikhil Komalla, Nelson Y. Dzade
wiley   +1 more source

Geochemical assessment of platinum group metals for phytomining

REM: International Engineering Journal, 2019
Phytomining is suggested as a technology to obtain platinum group metals (PGMs) nanoparticles from plants grown on the mineralized soils or tailings.
Peipei Shi, Marcello Veiga, Christopher Anderson   +2 more
doaj   +1 more source

Recent advances in polymeric chemically amplified positive resists: Materials and design strategies

Smart Molecules, EarlyView.
This review summarizes recent advances in the molecular design of positive chemically amplified resists, focusing on photoacid generators and polymer architectures. Key strategies for enhancing sensitivity—including self‐amplification effects, copolymerization of sensitive monomers, controlled polymerization, and photosensitized chemically amplified ...
Litao Zhou, Haoyuan Li, Jianhua Zhang, Hanshen Xin   +3 more
wiley   +1 more source