Preparation of mesoporous microspheres of NiO with high surface area and analysis on their pseudocapacitive behavior

Abbas, Syed Asad,Jung, Kwang-Deog Elsevier 2016 ELECTROCHIMICA ACTA Vol.193 No.-

<P><B>Abstract</B></P> <P>Nickel oxide with a high surface area showing high capacitance is reported here. Mesoporous microspheres (MMS) of 250NiO, 300NiO, 350NiO, 400NiO and 500NiO are synthesized by calcining mesoporous α-Ni(OH)<SUB>2</SUB> at 250°C, 300°C, 350°C, 400°C, and 500°C, respectively. The mesoporous α-Ni(OH)<SUB>2</SUB> was prepared by a hydrothermal method. 250NiO has the highest specific surface area of 295m<SUP>2</SUP>/g, and a high specific capacitance of 1,140Fg<SUP>⿿1</SUP> at a current density of 10Ag<SUP>⿿1</SUP> from galvanostatic discharge measurements. The cyclic voltammetry, galvanostatic discharge measurement and electrochemical impedance analysis exhibited that the pseudocapacitive behavior is more clarified for NiO prepared at higher calcination temperature. Apparently, the high specific capacitance of 250NiO results from the mesoporous pores and high specific surface area enhancing the transportation of ions during the charging and discharging process to store high energy. The power density and energy density of the 250NiO are 2.5kWkg<SUP>⿿1</SUP> and 59W h kg<SUP>⿿1</SUP> respectively at the current density of 10Ag<SUP>⿿1</SUP>.</P>

Application of Spiky Nickel Nanoparticles to Hydrogen Evolution Reaction

Syed Asad Abbas,Ahyeon Ma,Dongho Seo,Yun Ji Lim,Kwang-Deog Jung,Ki Min Nam 대한화학회 2020 Bulletin of the Korean Chemical Society Vol.41 No.11

The development of an efficient water splitting catalyst is a requirement for sustainable hydrogen production. Ni catalysts with different shapes were prepared using a solvothermal method for hydrogen evolution reaction (HER). The growth of the Ni particles was manipulated by controlling the reaction temperature and surfactant during the solvothermal reaction. The HER activity of the herein obtained Ni catalysts, namely semi-spherical, dendritic, and spiky nanoparticles were evaluated in alkaline conditions. Spiky Ni nanoparticles exhibited superior HER catalytic activity compared to that of spherical and dendritic Ni nanoparticles. The effect of morphology and electrochemical active sites has been fully investigated.

Facile and large-scale production of Ag nanoparticles for selective electrochemical CO2 reduction reaction

Abbas Syed Asad,Ma Ahyeon,Seo Dongho,Lim Yun Ji,Park Joon Yong,Lee Gaehang,Nam Ki Min 대한화학회 2021 Bulletin of the Korean Chemical Society Vol.42 No.11

Electrochemical CO2 reduction to carbon monoxide (CO) is immensely important for sustainable CO2 recycling. In this study, we established a facile synthetic method for large-scale production of Ag nanoparticles, which can be used for the selective electrochemical reduction of CO2 to CO. Thermal decomposition and reduction of AgNO3 produced Ag nanoparticles on a gram-scale in high yield (over 90%) with a homogeneous size distribution. The oleylaminecapped Ag nanoparticles were quasi-spherical with diameters of 9 2 nm. Ag nanoparticles are capable of electrochemical CO2 reduction to CO with high activity and stability. The CO selectivity of the catalyst was in the vicinity of 90% over a wide potential range and reached 94.2% at 1.4 V vs. RHE. The Ag nanoparticles showed good stability over 24 h. Different surface functional groups, for example, thiol and citrate were investigated to understand their influence on the variation in CO selectivity.

신생기업 임직원들의 조직문화와 조직몰입의 상관관계에 관한 연구

시에드아사드압바스보카리 ( Syed Asad Abbas Bokhari ),무하마드아프탑 ( Muhammad Aftab ),만주르샤히드 ( Manzoor Shahid ) 산업진흥원 2021 산업진흥연구 Vol.6 No.4

신생 기업은 선진국과 개발도상국에서 동시에 놀라운 속도로 확장하고 있다. 조직 및 인적 자원 관리 측면에서 청년 창업가들이 겪는 어려움이 많다. 결과적으로 과학계에서 거의 주목을 받지 못한 신생 기업을 조사하는 것이 중요하다. 본 연구에서는 개발도상국(파키스탄)의 중소기업(SME) 수준에서 운영되는 신생 기업만을 고려했다. 정보는 대도시 라호르에 위치한 10개 업체를 대상으로 설문조사를 통해 수집했다. 연구변수 간의 가설관계가 사실인지 여부를 확인하기 위해 상관분석을 수행하였다. 본 연구에서는 제안된 모든 가설 사이에 긍정적이고 통계적으로 유의한 연관성을 발견했다. 본 연구의 결과는 산업계, 학계 및 정책 입안자에게 중요한 의미를 갖는다. Startup enterprises are expanding at an alarming rate in both industrialized and developing countries simultaneously. Many difficulties confront young entrepreneurs in terms of organizational and human resource management. As a result, it is critical to research startup enterprises because they have received little attention from the scientific community. In this study, we solely considered new startup enterprises operating at the small and medium-sized enterprise (SME) level in a developing country (Pakistan). The information was gathered through a survey method from ten businesses located in the metropolitan metropolis of Lahore. The correlation analysis was conducted to determine whether or not the hypothesized relationship between research variables was true. We discovered a positive and statistically significant association between all of the proposed hypotheses. The findings of this study have significant implications for industry, academics, and policymakers.

정치적 불안정과 외국인 직접 투자: 신흥국 정부부패의 관점

시에드아사드압바스보카리 ( Syed Asad Abbas Bokhari ),무하마드아프탑 ( Muhammad Aftab ),만주르샤히드 ( Manzoor Shahid ) 산업진흥원 2021 산업진흥연구 Vol.6 No.4

파키스탄은 남아시아의 상서로운 개발도상국이다. 국제투명성기구(Transparency International)의 2020년 부패인식지수 보고서에 따르면 파키스탄은 0(최저)에서 100(최고)까지의 정치적 안정성 측면에서 전 세계적으로 총 31점으로 124위, -2.25점으로 188위를 기록했다. 더 결정적으로, 파키스탄에 대한 외국인 직접 투자의 유입은 2008년과 2019년 사이에 감소했다. 정치적 불안정과 정부 부패는 외국인 직접 투자와 양의 선형 관계와 음의 선형 관계를 모두 가지고 있지만, 본 연구에서는 시간이 지남에 따라 정치적 불안정과 외국인 직접 투자 사이의 정부 부패의 완화된 영향을 테스트했다. 또한 같은 국가의 여러 정치 체제에서 정치적 불안정과 외국인 직접 투자 사이의 관계를 테스트했다. 따라서, 본 연구의 결과는 권위주의 정권이 민주적 정부 기간보다 더 많은 외국인 직접 투자를 유치했음을 시사하였다. 더욱이, 우리는 그 나라에서 정부의 부패가 심할 때 외국인 직접 투자가 적다는 것을 발견했다. 그러나 정부의 부패는 정치적 불안정과 외국인 직접 투자(FDI) 사이의 긍정적인 관계를 약화시켰다. Pakistan is a South Asian auspicious developing country. Based on the corruption perception index report 2020 by transparency international, Pakistan has ranked 124 with total scores of 31 globally and 188 ranks with a score of -2.25 in terms of political stability ranging from 0 (lowest) to 100 (highest). More crucially, the inflow of foreign direct investment toward Pakistan has declined between 2008 and 2019. Though political instability and government corruption have both positive and negative linear relationships with foreign direct investment, we tested the moderating impact of government corruption between political instability and inward foreign direct investment over time. We also tested the relationship between political instability and inward foreign direct investment in different phases of political regimes in the same country. Our results suggested that authoritarian regimes attracted more inward foreign direct investment than that during democratic periods of government. Furthermore, we found that there was low inward foreign direct investment when government corruption was high in the country. However, government corruption weakened the positive relationship between political instability and inward foreign direct investment (FDI).

Performance of Electrochemical Cell to Produce Acid and Alkali for nCaCO₃ Production Using Waste Inorganics

Iqbal, Muhammad Ibrahim,Abbas, Syed Asad,Mehmood, Asad,Kim, Seong-Hoon,Ha, Heung Yong,Jung, Kwang-Deog Electrochemical Society 2017 Journal of the Electrochemical Society Vol.164 No.13

<P>If an electrolysis system can produce both HCl for Ca extraction and NaOH for carbonation with low energy consumption, mineralization of waste inorganics becomes an economically feasible approach to mitigate environmental CO2 emissions. For this purpose, NaCl electrolysis system with three compartments was fabricated: 1) an anode compartment for hydrogen oxidation, 2) a cathode compartment for hydrogen evolution, and (3) a central compartment between the anionic and cationic exchange membrane where the NaCl solution is introduced. Both 1 M NaOH and HCl were successfully co-produced with a caustic efficiency of 83.6% in the three-compartment cell from a 25 wt% NaCl solution at 1.5 V. Under those conditions, the equilibrium cell potential was 0.83 V. The current density under the optimized operating conditions was 40 mA cm(geo)(-2), and the overpotentials of the cathode (1.0 mg Pt cm(-2)) and anode (0.2 mg Pt cm(-2)) were 0.09 V and 0.05 V, respectively. (c) 2017 The Electrochemical Society. All rights reserved.</P>

Genome-wide identififi cation and characterization of a plant-specifific Dof transcription factor gene family in olive (Olea europaea) and its comparison with Arabidopsis

Mariyam,Muhammad Shafiq,Muhammad Haseeb,Rana Muhammad Atif,Syed Agha Armaghan Asad Abbas Naqvi,Numan Ali,Muhammad Arshad Javed,Fizza Gillani,Muhammad Saleem Haider 한국원예학회 2021 Horticulture, Environment, and Biotechnology Vol.62 No.6

DNA binding with one fi nger (Dof) proteins are encoded by a ubiquitous plant-specifi c transcription factor gene family thatplays a critical role in various biological processes including fruit ripening and organogenesis. The wild olive ( Olea europaeavar. sylvestris v1.0 ) genome was used to identify Dof gene family members using a set of bioinformatics tools. Gene structure,chromosome locations, phylogeny, protein motifs, miRNA targets and tissue-specifi c expression patterns were analyzed. Here, we identifi ed 51 potential Dof genes unevenly distributed on all chromosomes and a few scaff olds. Dof proteins in oliveclustered into eight subgroups (D1, B2, C3, C2.2, C1, C2.1, B1, and A) based on the established Arabidopsis classifi cation. The prevalence of segmental duplication was observed as compared to tandem duplication, and this was the main factorunderlying the expansion of the Dof gene family in olive. Tissue-specifi c expression profi ling of Oeu Dof genes revealed thatthe majority of Oeu Dof genes were highly expressed in fl owers, stem and meristem tissues. In seed and meristem tissues,cis-regulatory element (CRE) analysis revealed the presence of elements that are specifi cally responsive to light, circadian,auxin, and ABA. In addition, a comparative analysis between Dof genes in olive and Arabidopsis revealed eight groups orsub-families, although the C3 group of Arabidopsis was not represented in olive. This extensive genome evaluation of theDof gene family in olive presents a reference for cloning and functional analysis of the members of this gene family.