Different sizes of layered CoOOH were synthesized by the molten-salt-assisted method at different temperatures. X-ray diffraction and scanning electron microscope studies reveal that CoOOH grew...

Layered cobalt hydroxides are cost-efficient electrocatalysts for oxygen evolution reaction (OER) in the field of energy conversion. Herein, we developed a facile synthesis method of 3d...

2019年8月15日 · X-ray diffraction (XRD) analyses were implemented at room temperature on an 18 kW rotating target X-ray diffractometer. The surface morphologies and chemical compositions of the as-synthesized UiO-66-(COOH) 2 nanoparticles and prepared electrospun nanofibrous membranes were investigated by field emission scanning electron microscopy (FESEM ...

In this study, a facile synthesis of Cobalt oxyhydroxide (CoOOH) via the co-precipitation method at room temperature under vigorous stirring and compared the supercapacitor performance with that of...

2016年2月8日 · An X-ray diffractometer (XRD) on a BRUKER-D8 ADVANCE diffractometer was used while employing a graphite monochromatized Cu K α radiation flux at a scanning rate of 0.02° s −1 in...

2014年9月10日 · The structures of the films were probed through a high-resolution Philips X-Pert MRD X-ray diffractometer (XRD) with a CuKα 1 radiation source (λ = 1.54056 Å). The morphology of the films was revealed by a Hitachi S4700 field emission scanning electron microscope (SEM).

XRD、Raman、FTIR和XPS（图2）分析进一步表明异质结中Co3O4和Co(OH)2两相共存，且具有三明治结构（即外层为Co(OH)2，中间层为Co3O4）。 Co3O4/Co(OH)2异质结对应的拉曼光谱在589 cm-1处出现了一个新的特征峰，可能是由于Co3O4和Co(OH)2之间的相互作用引起的。

2020年1月8日 · The XRD and Raman techniques allowed confirming the effective conversion of α-Co(OH)2 to γ-CoOOH. The γ-CoOOH films are composed of hexagonal platelets on a steel plate substrate. The deposited films exhibit excellent electrochemical performance at different current densities, and good cycling stability of 95.1% after 2000 cycles of charge ...

2019年4月13日 · 部分研究指出，钴基化合物在碱性工作条件下会转化为羟基氧化钴（CoOOH）并作为活性物质参与反应，然而仍需要一种简单、能够大规模应用的合成手段，其在电化学条件下的转化过程需要进一步研究。 基于此，中科院上海高等研究院上海光源的研究人员尝试利用电化学方法制备出超薄CoOOH纳米片，其具有253 mV较低的过电势。 作者利用原位XAFS方法对其化学态演化过程进行了研究，观测到了CoOOH纳米片随外加电压的两个阶段转化过程。 研究人员首 …

2019年11月23日 · In this work, we have developed a polycarboxylic group MOF-UiO-66- (COOH) 2 used as both efficient enrichment material for phosphopeptides and efficient desorption/ionization matrix of laser desorption/ionization time-of-flight mass spectrometry (LDI-TOF MS) without elution. The crystal is spherical and the particle size is about 200 nm.