Zobrazeno 1 - 10
of 20
pro vyhledávání: '"Keshab Dahal"'
Autor:
Keshab Dahal, Nawa Raj Pokhrel, Ramchandra Rimal, Hum Nath Bhandari, Rajendra K. C. Khatri, Binod Rimal
Publikováno v:
SSRN Electronic Journal.
Autor:
Jingying Sun, Ran He, Zhifeng Ren, Keshab Dahal, Zhensong Ren, Haiqing Zhou, Shuo Chen, Ishwar Kumar Mishra
Publikováno v:
Materials Today Physics. 4:1-6
Hydrogen evolution electrocatalyst made from earth-abundant elements for electrocatalytic water splitting is essential for sustainable and clean hydrogen economy. At present, how to make efficient catalysts with superior catalytic activity from cheap
Autor:
Jiawei Zhou, Keshab Dahal, Gang Chen, Shuo Chen, Xinyu Wang, Qichen Song, Jun Mao, Qing Zhu, Feng Cao, Jingying Sun, Xi Lin, Qian Zhang, Zhifeng Ren
Publikováno v:
Energy & Environmental Science. 11:933-940
Thermoelectric properties are heavily dependent on the carrier concentration, and therefore the optimization of carrier concentration plays a central role in achieving high thermoelectric performance. The optimized carrier concentration is highly tem
Autor:
Fan Qin, Shuo Chen, Keshab Dahal, Ishwar Kumar Mishra, Jiming Bao, Jingying Sun, Haiqing Zhou, Zhifeng Ren
Publikováno v:
Energy & Environmental Science. 11:2246-2252
Highly active catalysts composed of earth-abundant materials, performing as efficiently as Pt catalysts, are crucial for sustainable hydrogen production through water splitting. However, most efficient catalysts consist of nanostructures made via com
Autor:
Shaowei Song, Zhifeng Ren, Hao Zhang, Weishu Liu, Keshab Dahal, Jun Mao, Udara Saparamadu, Fei Tian
Publikováno v:
Acta Materialia. 124:528-535
Mg2Sn0.75Ge0.25 has been recently demonstrated to be a promising thermoelectric material for power generation in the temperature range from room temperature to 723 K because of the high power factor of ∼54 μW cm−1 K−2 upon Sb doping to the Sn
Publikováno v:
RSC Advances. 7:33775-33781
Since the cold start of the internal combustion engine is not fuel efficient for vehicles, a warm start is desired. In this work, we propose to use thermal switching materials to warm-up the engine quickly at the cold start. We found that the V–VO2
Publikováno v:
Acta Materialia. 120:273-280
Solid solutions with chemical formula Mg 2 (Si,Ge,Sn) are promising thermoelectric materials with very good properties for the n-type material but significantly worse for the p-type. For power generation applications good n- and p-type materials are
Autor:
Keshab Dahal, Qing Jie, Kenneth W. White, Tulashi Dahal, Yucheng Lan, Weishu Liu, Sonika Gahlawat, Hee Seok Kim, Zhifeng Ren
Publikováno v:
Acta Materialia. 117:13-22
Till date, the dimensionless figure of merit (ZT) of p-type skutterudites lags its n-type counterpart. In this work, we report improved thermoelectric performance of La/Ce double filled p-type skutterudites. The samples were synthesized by hot pressi
Publikováno v:
Acta Materialia. 113:41-47
A series of Nb doped (Hf 0.25 Zr 0.75 ) 1– x Nb x NiSn ( x = 0–0.03) samples were synthesized and studied by arc-melting the elements to first form ingots, then ball-milling the ingots to obtain fine powders, and finally hot-pressing the fine pow
Publikováno v:
Journal of Materials Chemistry A. 4:1848-1854
SnSe has attracted some attention due to the recent report of record high thermoelectric figure-of-merit (ZT) of ∼2.6 at about 923 K in single crystals. Even though the ZT is high in single crystal SnSe, it was very low in its polycrystalline form