http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
- 中文 을 입력하시려면 zhongwen을 입력하시고 space를누르시면됩니다.
- 北京 을 입력하시려면 beijing을 입력하시고 space를 누르시면 됩니다.
RISS 인기검색어
- 검색키워드
- 저자 : Abhishek Meena (검색결과 4 건)
- 무료
- 기관 내 무료
- 유료
-
Pt-like hydrogen evolution on a V2O5/Ni(OH)2 electrocatalyst
Meena, Abhishek,Ha, Miran,Chandrasekaran, S. Selva,Sultan, Siraj,Thangavel, Pandiarajan,Harzandi, Ahmad M.,Singh, Bhupendra,Tiwari, Jitendra N.,Kim, Kwang S. The Royal Society of Chemistry 2019 Journal of materials chemistry. A, Materials for e Vol.7 No.26
<P>We report a highly efficient and cost-effective binder-free catalyst for the hydrogen evolution reaction (HER) using V2O5 particles on nickel foam (NF) (V2O5/Ni(OH)2@NF). This low-cost catalyst exhibits Pt-like activity with a low overpotential of 39 mV at 10 mA cm<SUP>−2</SUP> (lowest among V-based materials which are known to be generally non-explosive and safe) and long-term stability in a 1 M KOH solution. The overall performance is highly comparable to that of a commercial 20% Pt/C catalyst on NF. Furthermore, the V2O5/Ni(OH)2@NF outperforms the Pt/C catalyst at a higher current density (100 mA cm<SUP>−2</SUP>) which is more preferable for industrial applications. First principles calculations show that the remarkable HER activity is ascribed to the near-zero adsorption free energy (Δ<I>G</I>H*) on the Ni-site of Ni(OH)2@NF and the Ni- and O-sites of <I>in situ</I> generated V2O5@NF, due to the charge transfer arising from adsorbed O atoms on Ni(111), along with high conductivity of NF. O-adsorption on the Ni transition metal surface downshifts the d-band center of the transition metal, which helps in quick hydrogen desorption by weakening the hydrogen binding strength. As a result, most Ni fcc sites of V2O5/Ni(OH)2@NF are more active than pristine Ni fcc sites. The V2O5/Ni(OH)2@NF catalyst initiates overall water splitting at 1.53 V in a 6 M KOH solution for solar-to-hydrogen generation in a two-electrode set-up using a solar panel.</P>
-
KJP : Review Article; An Insight Into Neurophysiology of Pulpal Pain: Facts and Hypotheses
( Niharika Jain ),( Abhishek Gupta ),( Meena N ) 대한통증학회 2013 The Korean Journal of Pain Vol.26 No.4
Pain and pain control are important to the dental profession because the general perception of the public is that dental treatment and pain go hand in hand. Successful dental treatment requires that the source of pain be detected. If the origin of pain is not found, inappropriate dental care and, ultimately, extraction may result. Pain experienced before, during, or after endodontic therapy is a serious concern to both patients and endodontists, and the variability of discomfort presents a challenge in terms of diagnostic methods, endodontic therapy, and endodontic knowledge. This review will help clinicians understand the basic neurophysiology of pulpal pain and other painful conditions of the dental pulp that are not well understood. (Korean J Pain 2013; 26: 347-355)
-
Template free facile synthesis of mesoporous mordenite for bulky molecular catalytic reactions
Bhupendra Kumar Singh,김용선,백승빈,Abhishek Meena,Siraj Sultan,곽자훈,김광수 한국공업화학회 2018 Journal of Industrial and Engineering Chemistry Vol.57 No.-
The synthesis of highly stable mesoporous zeolites is one of the great challenges in materials science. Soft and hard templating methods have widely been applied to synthesize mesoporous zeolites having different pore diameters and structures. Here, we report a facile and template free hydrothermal synthesis of mesoporous mordenite (MOR) by controlling synthesis conditions. The small nanoparticles of ∼50–80 nm were self-assembled into 2–3 μm MOR. Intracrystalline mesopores of ∼3–5 nm were abundantly observed throughout the MOR nanoparticles. Synthesized mesoporous MOR demonstrated significantly improved catalytic efficiencies (∼100%), 3–5 times higher than its conventional counterparts (CBV 10A and CBV 21).
-
Template free facile synthesis of mesoporous mordenite for bulky molecular catalytic reactions
Singh, Bhupendra Kumar,Kim, Yongseon,Baek, Seung Bin,Meena, Abhishek,Sultan, Siraj,Kwak, Ja Hun,Kim, Kwang S. THE KOREAN SOCIETY OF INDUSTRIAL AND ENGINEERING 2018 Journal of Industrial and Engineering Chemistry Vol.57 No.-
<P><B>Abstract</B></P> <P>The synthesis of highly stable mesoporous zeolites is one of the great challenges in materials science. Soft and hard templating methods have widely been applied to synthesize mesoporous zeolites having different pore diameters and structures. Here, we report a facile and template free hydrothermal synthesis of mesoporous mordenite (MOR) by controlling synthesis conditions. The small nanoparticles of ∼50–80nm were self-assembled into 2–3μm MOR. Intracrystalline mesopores of ∼3–5nm were abundantly observed throughout the MOR nanoparticles. Synthesized mesoporous MOR demonstrated significantly improved catalytic efficiencies (∼100%), 3–5 times higher than its conventional counterparts (CBV 10A and CBV 21).</P> <P><B>Highlights</B></P> <P> <UL> <LI> Template free facile synthesis of mesoporous mordenite (syn MOR). </LI> <LI> The small nanoparticles of ∼50–80nm were self-assembled into a 2–3μm MOR. </LI> <LI> Intracrystalline mesoporous structure obtained without any acid/base treatment. </LI> <LI> ∼3–5nm mesopores were abundantly observed throughout the MOR nanoparticles. </LI> <LI> Syn MOR demonstrated 3–5 times higher efficiencies than conventional counterparts. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>A facile and template free hydrothermal synthesis of mesoporous mordenite (MOR) which demonstrated significantly enhanced catalytic efficiencies and selectivity due to large pore size (3–5nm).</P> <P>[DISPLAY OMISSION]</P>
KISS연관 검색어 추천
이 검색어로 많이 본 자료
활용도 높은 자료
