ELECTROCHIMICA ACTA
·
2019
·
IF 5.383
Juan Xia,Qi Wang,Miaomiao Chen,Wenwen Li,Jie Liu,Jitang Chen,Hai Wu,Suhua Fan
To avoid the evaporation and leakage of the liquid electrolyte and increase the long-term stability of the cell, a strategy was developed to construct bifacial dye-sensitized solar cells employing quasi-solid-state electrolyte (BQDSSCs). Two metal selenides with different morphologies, Co 0.85 Se, which has a foliate structure like the structure of graphene, and Ni 0.85 Se, which has uniform nanoparticle , were synthesized by a facile one-step hydrothermal method . The proposed BQDSSCs were then constructed using the TiO 2 photoanode, polyvinylidene fluoride gel electrolyte, and Co 0.85 Se or Ni 0.85 Se as the counter electrode (CE) electrocatalysts . Cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS), and Tafel polarization measurements were performed to investigate the electrochemical behavior of the Co 0.85 Se, Ni 0.85 Se, and Pt CEs. The results showed that the graphene-like Co 0.85 Se material exhibited better operational stability, greater charge-transfer ability, and higher electrocatalytic activity for the reduction of I 3 − than the Ni 0.85 Se nanoparticles. Furthermore, for the BQDSSCs, Co 0.85 Se yielded the highest power conversion efficiencies (PCE) of 8.33% and 4.79% under front and rear irradiations, respectively, in comparison with the front and rear efficiencies of 7.44% and 4.05% for Pt and 7.23% and 4.16% for Ni 0.85 Se CEs, respectively. The BQDSSC device based on the Co 0.85 Se CE exhibited good long-term stability with only a 5% drop in power conversion efficiency after 1000 h of one-sun soaking. Consequently, graphene-like Co 0.85 Se was considered to be an ideal material for constructing cost-effective BQDSSCs.
研究领域:
材料科学
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能源科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2022
·
IF 5.518
Yuelong Xu,Na Li,Ran Wang,Pengfei Bian,Jing Wang,Tifeng Jiao,Zhenfa Liu
Developing robust and efficient non noble catalysts for water splitting is needed in the energy storage and application field. Constructing electronic structures to enhance the catalytic activity is always interesting and meaningful. Herein, electronic structures are simply synthesized through a rational design of Co-Co 0.85 Se heterostructures anchoring on the defective N-doped carbon matrix. Co anchoring on the defective N-doped carbon matrix is obtained from hydrothermal-carbonization process of pectin, melamine and cobalt chloride. Rational design of partial selenization can construct electronic structures to form Co-Co 0.85 Se heterostructures anchoring on the defective N-doped carbon matrix (Co-Co 0.85 Se-CN). The introduction of Co atoms induces the electron cloud redistribution of Co 0.85 Se, enhancing the electrocatalytic activity for water splitting. The defective N-doped carbon matrix provides plenty of catalytic sites and good conductivity for ions transition. Co-Co 0.85 Se-CN exhibits outstanding catalytic performance for hydrogen evolution reaction and oxygen evolution reaction . The Operando Raman spectroscopy demonstrates that the dual active centers of Co and Se atom, facilitating the catalytic process for water splitting. DFT calculation results reveal that the constructed electronic structures from Co and Co 0.85 Se-CN is good for the H* adsorption for HER. This work provides a facile synthetic strategy to construct electronic structures for water splitting.
研究领域:
材料科学
·
能源化学
✓ 已验证
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2014
·
IF 3.065
Ji-Ming Song,Cheng-Cheng Liu,Song-Song Zhang,He-Lin Niu,Chang-Jie Mao,Sheng-Yi Zhang,Yu-Hua Shen
Adsorption is an effective method of removing contaminants from water, however, desorption often becomes more difficult after adsorption process, due to the strong binding force between the adsorbent and pollutants, so that the desorbent cannot be reused. In this paper, Co 0.85 Se nanosheets prepared through a hydrothermal reaction have been used to remove cationic dye methylene blue from aqueous solution in the presence of sodium borohydride. The results show that adsorption/desorption properties of the Co 0.85 Se nanosheets to MB can be greatly changed in the presence/absence of sodium borohydride (NaBH 4 ), and the equilibration time of the adsorption/desorption depends on the amount of NaBH 4 . When NaBH 4 or Co 0.85 Se nanosheets existed together, the residual quantity of MB in solution was less than one-twentieth of that in the system alone using either NaBH 4 or Co 0.85 Se nanosheets; while a large number of MB (ca.90%) was released once again into the solution after NaBH 4 was decomposed because of catalysis of Co 0.85 Se. The zeta potential and pH tests have been elucidated the mechanism for the adsorption of MB onto Co 0.85 Se nanosheets. The efficient adsorption and recovery of dyes indicate that the prepared Co 0.85 Se nanosheets have potential application in wastewater treatment under the assistance of NaBH 4 .
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
International Journal of Electrochemical Science
·
2023
·
IF 1.5
Xiang Li,Miaomiao Chen,Rong Rui,Zhigui Wan,Feng Chen,Xiaoshuang Zuo,Chang Wang,Hai Wu
Foliate cobalt selenide (Co0.85Se) was synthesized by the hydrothermal method and was combined with trace platinum (Pt) to form a Pt/Co0.85Se material, which was modified on the surface of a glassy carbon electrode (GCE) to fabricate a novel nonenzymatic electrochemical sensor (Pt/Co0.85Se/GCE) for the selective determination of dopamine (DA). On the Pt/Co0.85Se interface, well-separated oxidation peaks of DA, ascorbic acid (AA), and uric acid (UA) were observed due to the superior conductivity of Co0.85Se and the excellent catalytic activity of Pt. With the synergistic effect of Pt and Co0.85Se, the linear range for DA detection was found to be 0.50-22.0 pM with a detection limit of 0.39 pM (S/N=3) and a high sensitivity of 2306 pA mM -1 cm -2 . Furthermore, the proposed sensor exhibited high selectivity for the determination of DA in the presence of UA, AA, and other potential interferences, which indicated that the sensor showed great potential for practical and reliable DA analysis of serum samples.
研究领域:
分析化学
·
生物医学工程
✓ 已验证
DOI
高影响因子
Nano Research
·
2020
·Vol. 13
·期 11
·2950-2957
·
IF 8.183
Qin Rong,Hou Jiagang,Xu Caixia,Yang Hongxiao,Zhou Qiuxia,Chen Zizhong,Liu Hong
Electrocatalytic water splitting via hydrogen evolution reaction (HER) represents one of promising strategies to gain hydrogen energy. In current work, self-supporting Co 0.85 Se nanosheets network anchored on Co plate (Co 0.85 Se NSs@Co) is fabricated by employing easily tailorable Co metal plate as the source conductive substrate. The scalable dealloying and hydrothermal selenization strategy was employed to build one layer of three dimensional interlinking Co 0.85 Se nanosheets network on the surface of Co plate. Benefiting from bulky integrated architecture and rich active sites, the as-made Co 0.85 Se NSs@Co exhibits superior electrocatalytic activity and long-term catalytic durability toward HER. It only requires lower overpotentials of 121 and 162 mV to drive the current density of 10 mA·cm −2 for hydrogen evolution in 0.5 M H 2 SO 4 and 1 M KOH solution. Especially, no evident activity decay occurs upon 1,500 cycles or continuous test for 20 h at 10 mA·cm −2 in both acidic and alkaline electrolytes. With the merits of exceptional performances, scalable production, and low cost, the self-supporting Co 0.85 Se NSs@Co holds prospective application potential as stable and binder-free electrocatalysts for hydrogen generation in a wide range of electrolyte.
研究领域:
材料科学
·
能源化学
✓ 已验证
DOI
高影响因子
Materials Today Energy
·
2018
·
IF 0
Guangyao Ma,Chengjun Li,Fan Liu,Muhammad K. Majeed,Zhenyu Feng,Yanhua Cui,Jian Yang,Yitai Qian
Metal-organic frameworks (MOFs)-derived metal chalcogenides/carbon, has been developed as promising anode materials for lithium/sodium ion batteries. However, they are not explored for potassium-ion batteries yet. Here, ZIF-67 is employed as a self-sacrificed template to synthesize Co 0.85 Se nanoparticles in N-doped carbon as an anode material for potassium-ion batteries. In this composite, N-doped carbon enhances the electron conductivity, cushions the volume change and inhibits the aggregation of Co 0.85 Se upon cycling. Meanwhile, mesoporous structure shortens the diffusion distance of potassium ions , as well as increases the contact between electrolyte and electrode. These features endow this composite superior performances. It delivers a specific capacity of 114.7 mA h g −1 at 1000 mA g −1 after 250 cycles. At 2.0 A g −1 , the specific capacity still maintains at 110.7 mA h g −1 . The electrochemical performances of full cells based on Co 0.85 Se@NC as an anode material are also investigated. The result greatly spurs the exploration of metal chalcogenides as anode materials for potassium ion batteries .
研究领域:
材料科学
·
电化学
·
能源存储
·
纳米材料
·
电池技术
✓ 已验证
DOI
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2020
·
IF 7.489
Chunhui Wang,Bao Zhang,Xing Ou,Haifeng Xia,Liang Cao,Lei Ming,Jiafeng Zhang
Structure control is widely admitted as a feasible strategy to restrain volume change and enhance electrical conductivity for chalcogenide anode materials . Herein, three-dimensionally hierarchical structure Co 0.85 Se@N-doped graphene hybrid is well-designed and synthesized by a facile hydrothermal strategy and post-calcination. It is noted that, owing to the nanoscale Kirkendall effect, the Co 0.85 Se nanograins derived from uniform zeolitic imidazolate framework (ZIF-67) precursor are incorporated into a polyhedron-in-polyhedron structure, which is consisted of in-situ formed amorphous carbon and interconnected pliable graphene nanosheets with enormous N-doping atoms. This unique dual-carbon protecting layers are beneficial to mitigate the volume expansion with high integrity, and facilitate the fast Li/electron transport with improved conductivity simultaneously, thus resulting in the superior Li-storage performance. As expected, the framework-controlled Co 0.85 Se@N-doped rGO composite demonstrates an outstanding cycling stability (787.7 mA h g −1 after 1000 cycles at 2 A g −1 ) and remarkable rate capability (400.8 mA h g −1 at ultrahigh rate of 10 A g −1 ). This work presents an enlightened strategy to design chalcogenide anode with desired nano-/microstructure by structure control and kinetic increase.
研究领域:
材料科学
·
能源存储
✓ 已验证
DOI
PubMed
高影响因子
CARBON
·
2017
·
IF 6.337
Hong Yuan,Qingze Jiao,Jia Liu,Xiufeng Liu,Yongjian Li,Daxin Shi,Qin Wu,Yun Zhao,Hansheng Li
A novel nanocomposite of Co 0.85 Se nanotubes with reduced graphene oxide (Co 0.85 Se/RGO) is prepared by a facile hydrothermal approach coupled with in situ selenization, which is applied as counter electrode in dye-sensitized solar cells. Electrochemical analysis shows that the Co 0.85 Se/RGO composite displays a higher electrocatalytic activity for the reduction of triiodide respect to its single components due to the unique hollow structure of Co 0.85 Se as well as the synergistic effects of high catalytically active Co 0.85 Se and conductive RGO. As a consequence, the dye-sensitized solar cell (DSSC) fabricated with the Co 0.85 Se/RGO electrode presents a high photovoltaic conversion efficiency of 7.81%, exceeding the cell based on a Pt electrode (7.55%). Moreover, a considerable electrochemical stability is also achieved when the material was used as a counter electrode in a I − /I 3 − electrolyte. Therefore, the Co 0.85 Se/RGO exhibits a huge potential as efficient and low-cost Pt-free counter electrode material to replace Pt allowing for large-scale fabrication of DSSCs.
研究领域:
材料科学
·
能源技术
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2022
·
IF 7.336
Dengfeng Yu,Bo Yang,Huimin Liang,Gongyuan Zhao,Hong Zhang,Yuanlin Wang,Ye Sun,Miao Yu
Constructing hollow-structured materials is an efficient route to address the volume expansion of anode and enhance ion diffusion for sodium-ion battery (SIB). Superior to the single-walled products, multi-walled hollow-structured anode materials possess more storage sites, enhanced robustness, and higher volumetric capacity; nevertheless, synthesis of the multi-walled hollow structure often requires harsh synthesis conditionand complicated etching process. Herein, we report fabrication of Co 0.85 Se double-walled hollow cages coated by a nitrogen-doped carbon layer (Co 0.85 Se@CN) as high-performance anode materials for SIB. Using ZIF-67 as precursor, a facile ion exchange strategy is employed with no aid of high temperature treatment and complex etching process. The resultant Co 0.85 Se@CN exhibit distinct double-walled hollow structure with abundant lacunas on the walls, which increases the accessible area, shortens the ion transport path and most importantly provides appropriate buffer space against volume expansion. Moreover, the C protective layer on both sides of the inner- and outer-walls further benefits high conductivity, chemical stability, and robustness during charge/discharge process. As a result, the Co 0.85 Se@CN anode deliver a high reversible capacity of 402 mAh g –1 at 50 mA g –1 and 316 mAh g –1 at 100 mA g –1 after 100 cycles for SIB.
研究领域:
材料科学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
INORGANIC CHEMISTRY
·
2021
·
IF 5.165
Xiaoyan Li,Ransha Deng,Qingping Li,Dunmin Lin,Xijun Wei,Xiaoqin Liu,Na Jiang,Yu Huo,Fengyu Xie,Qiaoji Zheng
Transition-metal selenides have been considered as one of the most promising anode materials for sodium-ion batteries (SIBs) due to their high theoretical capacity and excellent rate performance. However, rapid capacity decay and poor cycling stability limit their practical application as the anode for SIBs. Carbon coating is one of the most effective ways to solve the above problems, but the thickness and uniformity of the coating layer are difficult to control. Herein, we successfully synthesize metal–organic framework (MOF)-derived porous N-doped carbon nanocubes homogeneously filled with ZnSe and Co0.85Se and interconnected by reduced graphene oxide (ZCS@NC@rGO). ZCS@NC@rGO with more active sites and the synergistic effect of the ZnSe and Co0.85Se heterojunction can enhance the sodium storage performance. The porous carbon nanocubes effectively prevent the agglomeration of active particles, and the rGO acting as a carbon network can significantly buffer the inevitable volume changes. At the same time, carbon nanocubes and the rGO are interconnecting to form a conductive network to accelerate electron transfer. Based on the aforementioned advantages, the ZCS@NC@rGO electrode shows an excellent sodium storage performance. Our investigation opens up a new horizon for the rational design of transition-metal selenide anodes for SIBs with a unique structure.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Energy Materials
·
2019
·
IF 0
Junxiang Zhang,Zhuanpei Wang,Xuelian Li,Jie Yang,Chenhui Song,Yongpeng Li,Jianli Cheng,Qun Guan,Bin Wang
The fiber-shaped dye sensitized solar cell represents a promising flexible power conversion system for next generation wearable electronics due to its facile preparation, lightweight, and good weavability. However, the use of fiber-shaped dye sensitized solar cells is largely limited by their low power conversion efficiency and flexibility. Herein, a flexible Pt-free fiber-shaped dye sensitized solar cell with a high power conversion efficiency of 10.28% is fabricated, by sequentially growing polyaniline layers and Co0.85Se nanosheets on the surface of carbon fibers as the counter electrodes and TiO2 nanotubes grown on the Ti wire as the photoanode. The polyaniline layer can not only work as the nucleation sites for the following deposition of the Co0.85Se nanosheets but also act as the catalytic sites with large specific surface area to further improve the catalytic activity and reduce the charge transfer resistance, while the Co0.85Se nanosheets can further improve the electrocatalytic activity for the transition of I–/I3–, leading to a remarkably enhanced photovoltaic performance of the cell. This result provides a new design strategy for high-performance flexible fiber-shaped dye sensitized solar cells.
研究领域:
材料科学
·
纳米技术
·
太阳能
·
可穿戴技术
✓ 已验证
DOI
危险品化学品经营许可证（带存储）