ACS Nano
·
2021
·
IF 15.881
Shuhao Xiao,Xinyan Li,Wensi Zhang,Yong Xiang,Tingshuai Li,Xiaobin Niu,Jun Song Chen,Qingyu Yan
Metal selenides are considered as a group of promising candidates as the anode material for sodium-ion batteries due to their high theoretical capacity. However, the intrinsically low electrical and ionic conductivities as well as huge volume change during the charge-discharge process give rise to an inferior sodium storage capability, which severely hinders their practical application. Herein, we fabricated In2Se3/CoSe2 hollow nanorods composed of In2Se3/CoIn2/CoSe2 by growing cobalt-based zeolitic imidazolate framework ZIF-67 on the surface of indium-based metal–organic framework MIL-68, followed by in situ gaseous selenization. Because of the CoIn2 alloy phase in between In2Se3 and CoSe2, a heterostructure consisting of two alloy/selenide interfaces has been successfully constructed, offering synergistically enhanced electrical conductivity, Na diffusion process, and structural stability, in comparison to the single CoIn2-free interface with only two metal selenides. As expected, this nanoconstruction delivers a high reversible capacity of 297.5 and 205.5 mAh g–1 at 5 and 10 A g–1 after 2000 cycles, respectively, and a superior rate performance of 371.6 mAh g–1 at even 20 A g–1.
研究领域:
材料科学
·
能源存储
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2014
·
IF 2.726
Changbai Liu,Xiao Chi,Xingyi Liu,Shenglei Wang
Nano sized semiconductor oxide type gas sensor has been widely studied due to its high sensitivity. Therein, one-dimensional nanostructures have attracted a lot of interests. In this work, nanofiber and nanotube of one-dimensional nano sized cobalt–indium combined oxide were fabricated by single nozzle electrospinning. The ethanol gas sensing properties of Co–In oxide nanofiber and nanotube were investigated. The morphologies were observed by scanning electron microscopy (SEM). The elementary composition was characterized by powder X-ray diffraction (XRD), and energy-dispersive X-ray spectrometry (EDS). The BET surface area of the nanotube can be calculated to be 22 m 2 /g, which is larger than 18 m 2 /g of nanofiber. The results reveal that one-dimensional nanotubes have larger sensitivity to ethanol than that of one-dimensional nanofibers. Besides, the comparison of their response and recovery curves was tested. The selectivity was also investigated. Both nanofibers and nanotubes show a fast response and excellent selectivity.
研究领域:
材料科学
·
化学
✓ 已验证
产品关联
DOI
高影响因子
Nature Communications
·
2023
·Vol. 14
·期 1
·1-10
·
IF 16.6
Du Jiannan,Han Guokang,Zhang Wei,Li Lingfeng,Yan Yuqi,Shi Yaoxuan,Zhang Xue,Geng Lin,Wang Zhijiang,Xiong Yueping,Yin Geping,Du Chunyu
The two-electron oxygen reduction reaction in acid is highly attractive to produce H 2 O 2 , a commodity chemical vital in various industry and household scenarios, which is still hindered by the sluggish reaction kinetics. Herein, both density function theory calculation and in-situ characterization demonstrate that in dual-atom CoIn catalyst, O-affinitive In atom triggers the favorable and stable adsorption of hydroxyl, which effectively optimizes the adsorption of OOH on neighboring Co. As a result, the oxygen reduction on Co atoms shifts to two-electron pathway for efficient H 2 O 2 production in acid. The H 2 O 2 partial current density reaches 1.92 mA cm −2 at 0.65 V in the rotating ring-disk electrode test, while the H 2 O 2 production rate is as high as 9.68 mol g −1 h −1 in the three-phase flow cell. Additionally, the CoIn-N-C presents excellent stability during the long-term operation, verifying the practicability of the CoIn-N-C catalyst. This work provides inspiring insights into the rational design of active catalysts for H 2 O 2 production and other catalytic systems.
研究领域:
化学催化
·
材料科学
·
能源化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
MATERIALS RESEARCH BULLETIN
·
2018
·
IF 2.873
Wenjing Hou,Yaoming Xiao,Gaoyi Han
The ternary cobalt diindium sulfide (CoIn 2 S 4 ) counter electrode (CE) with interconnected nanosheet array structure is fabricated on the fluorine-doped tin oxide (FTO) substrate by in situ ethanol solvothermal synthesis. The ethanol solvent and In 2.77 S 4 intermediate play important roles on the formation of the interconnected nanosheet array structure. The dye-sensitized solar cell (DSSC) with the optimized ternary CoIn 2 S 4 CE gives an energy conversion efficiency of 8.83%, which is much higher than that of DSSCs based on the binary CoS 2 (6.47%), and In 2.77 S 4 (0.46%) CEs and can be comparable with that of Pt CE (8.19%) under full sunlight illumination (100 mW cm −2 , AM 1.5 G). Except for the intrinsically electrocatalytic activity from the CoIn 2 S 4 , the higher conversion efficiency of CoIn 2 S 4 based DSSC can be attributed to that the interconnected nanosheet array structure provides plentiful catalytic active sites, abundant electron transport channels, and fast electrolyte diffusion.
研究领域:
材料科学
·
能源科学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）