能够通过电催化减少水分的高效且富含地球的元素,对燃料的可持续生产具有吸引力。在地球上富含金属的金属中,由于其过高的电压,铜是析氢反应(HER)的最便宜但通常最被忽略的选择之一。在此,我们首次通过两种不同的方法对铜进行过电位调节,以调节铜的过电位。水热和湿化学方法,形成碲化铜纳米链和聚集体。碲化铜作为HER的电催化剂的应用在活性和稳定性方面都取得了丰硕的成果。水热合成催化剂Cu 2– x Te / hyd在10 mA cm –2处显示出低过电位(347 mV)对她。此外,该催化剂表现出非常低的电荷转移阻力(ř克拉24.4Ω)和,如所预期,铜2- X的Te /水合表现出降低188毫伏/癸的塔菲尔斜率值相比于铜2- X碲/湿(280 mV / dec)。计时电流法研究表明,两种催化剂甚至在长达12小时的长期稳定性。计算得出Cu 2– x Te / hyd的法拉第效率,通过气相色谱(GC)研究发现为95
Cleavage∕cross-coupling strategy for converting β-O-4 linkage lignin model compounds into high valued benzyl amines via dual C–O bond cleavage
作者:Le Jia、Chao-Jun Li、Huiying Zeng
DOI:10.1016/j.cclet.2021.08.125
日期:2022.3
Lignin is the most recalcitrant of the three components of lignocellulosic biomass. The strength and stability of the linkages have long been a great challenge for the degradation and valorization of lignin biomass to obtain bio-fuels and commercial chemicals. Up to now, the selectivecleavage of C–O linkages of lignin to afford chemicals contains only C, H and O atoms. Our group has developed a c
Intervening Bismuth Tungstate with DNA Chain Assemblies: A Perception toward Feedstock Conversion via Photoelectrocatalytic Water Splitting
作者:Sangeetha Kumaravel、M. Praveen Kumar、Prabaharan Thiruvengetam、Nischala Bandla、Selvasundarasekar Sam Sankar、Subbiah Ravichandran、Subrata Kundu
DOI:10.1021/acs.inorgchem.0c02296
日期:2020.10.5
An advanced approach with DNA-mediated bismuth tungstate (Bi2WO6) one-dimensional (1-D) nanochain assemblies for hydrogen production with 5-fold enhanced photoelectrochemical (PEC) water splitting reaction is presented. The creation of new surface states upon DNA modification mediates the electron transfer in a facile manner for a better PEC process. The UV-Vis-DRS analysis results a red shift in the optical absorption phenomenon with the interference of DNA modification on Bi2WO6, and, thus, the band gap was tuned from 3.05 eV to 2.71 eV. The applied bias photon-to-current efficiency (ABPE) was calculated and shows a maximum for the Bi2WO6@ DNA-2 (25.22 x 10(-4)%), compared to pristine Bi2WO6 (7.76 x 10-4%). Furthermore, the idea of practical utility of produced hydrogen from PEC is established for the first time with photocatalytic feedstock conversion to platform chemicals using cinnamaldehyde, 2-hydroxy-1-phenylethanone, and 2-(3-methoxyphenoxy)-1-phenylethanone in large scale by hydrogenation and/ or hydrogenolysis reactions under eco-friendly green conditions with external hydrogen pressure in an aqueous mixture. Also, the recyclability experiment delivered good yields, which further confirm the robustness of the developed catalyst.