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Controllable synthesis of a hollow Cr2O3 electrocatalyst for enhanced nitrogen reduction toward ammonia synthesis

Chinese Journal of Chemical Engineering 2022年第1期35卷 358-365页

作者： Lei Shi Yu Yin Hong Wu Rajan Arjan Kalyan Hirani Xinyuan Xu Jinqiang Zhang nasir rafique Abdul Hannan Asif Shu Zhang Hongqi Sun School of Engineering Edith Cowan UniversityJoondalupWA 6027Australia College of Materials Science and Engineering Nanjing Forestry UniversityNanjing 210037China School of Environmental and Chemical Engineering Jiangsu University of Science and TechnologyZhenjiang 212003China

As a fascinating alternative to the energy-intensive Haber-Bosch process,the electrochemically-driven N_(2) reduction reaction(NRR)utilizing the N_(2) and H_(2)O for the production of NH3 has received enormous *** development and preparation of promising electrocatalysts are requisite to realize an efficient N_(2) conversion for NH3 *** this research,we propose a template-assisted strategy to construct the hollow electrocatalyst with controllable *** a paradigm,the hollow Cr_(2)O_(3) nanocatalyst with a uniform size(~170 nm),small cavity and ultrathin shell(~15 nm)is successfully fabricated with this *** promising hollow structure is favourable to trap N_(2) into the cavity,provides abundant active sites to accelerate the three-phase interactions,and facilitates the reactant transfer across the *** to these synergetic effects,the designed catalyst displays an outstanding behaviour in N_(2) fixation for NH3 production in ambient *** the neutral electrolyte of 0.1 mol·L^(-1) Na_(2)SO_(4),an impressive electrocatalytic performance with the NH3 generation rate of 2.72μg·h^(-1)·cm^(-2) and a high FE of 5.31%is acquired respectively at-0.85 V with the hollow Cr_(2)O_(3) *** by this work,it is highly expected that this approach could be applied as a universal strategy and extended to fabricating other promising electrocatalysts for realizing highly efficient nitrogen reduction reaction(NRR).

关键词： Hollow structure Electrocatalytic N_(2)fixation NH_(3)synthesis Template-assisted strategy Ambient condition

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Mass-Casualty Distribution for Emergency Healthcare:A Simulation Analysis

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International Journal of Disaster Risk Science 2020年第3期11卷 364-377页

作者： Mohsin nasir Jat Raza Ali rafique Edwards School of Business University of SaskatchewanSaskatoonSK S7N5A7Canada School of Management and Marketing Kean UniversityUnionNJ 07083USA

This study focuses on the casualty-load distribution problem that arises when a mass casualty incident(MCI)necessitates the engagement of multiple medical *** discrete event simulations,the study analyzed different MCI response regimes in Lahore,Pakistan,that vary in terms of the level of casualty-load distribution and the required coordination between the incident site and the responding *** terrorist attacks in this major metropolitan area were considered to set up experiments for comparing delays in treatment under the modeled *** analysis highlights that the number of casualties that are allowed to queue up at the nearest hospital before diverting the casualty traffic to an alternate hospital can be an important factor in reducing the overall treatment *** diverting the casualty traffic from the incident site to an alternate hospital can increase the travel time,while a delay in diversion can overload the nearest hospital,which can lead to overall longer waiting times in the *** casualty distribution mechanisms based only on the responding hospitals’available capacity and current load can perform inefficiently because they overlook the trade-off between the times casualties spend in traveling and in queues.

关键词： Casualty distribution Emergency response Mass casualty incidents Pakistan Urban terrorism

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